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Thread: VicCrownVic's 1998 Mercury Grand Marquis LS

  1. #21
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    That works for me, just need to order the intake when I find time to sit for more than 5 minutes.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  2. #22
    Member of the Orb Alliance packman's Avatar
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    Nice, very nice!

    My '05 has the analog cluster as well. Funny how my Mom's Explorer of the same year (2005) has the digital dash (message center too) and almost every option available; and yet my Merc remains so Spartan.

    What will become of The Scab and The Ice Car? FrankenMerc them?

  3. #23
    I'm an air-conditioned gypsy gadget73's Avatar
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    Underside does look pretty good. Never heard of Sentury tires but they're obviously pretty new so who cares.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  4. #24
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    The Scab will most likely be backup, and The Ice Car will most likely become a parts car. Well, the parts that haven't rotted off anyway.
    Not sure I'll have time this year to do much with either since I would like to get the engine I bought this past fall into the Yukon. I keep telling the wife we should have waited to find a place with a garage. She likes the Yukon and I could have had it done with my own garage.
    On the other hand, the new place (moved here last May) is really working well for the family so I'm ok with slow car progress. I can fix the cars when/if the time comes, family isn't going to do well on the back burner.

    With the Ice Car becoming the parts car, I'll likely send the '89 to the JY. After I get the windshield off, and maybe the passenger power seat track. I've taken everything else I wanted from that car over the last 8 years.

    I thought the same thing on the tires. I usually get about 3 years out of cheap Chinesium tires so I figure these should at least last me that long.

    https://senturytireusa.com/
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  5. #25
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Also, not disappointed with the performance. I drove my mom's '93 back in '07 or '08 when my '89 needed a trans. I did not like that car, it just felt lame compared to my box. Really liking this whale though.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  6. #26
    I post a lot...
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    Nice car! Enjoy it. Unfortunately many of the low mile well kept examples are found with Florida Edition cloth tops. At least it is black and goes well with the car.

    My 04 was white with a black top and interior.

    As others mentioned the accumulator was more of a problem on the later whales when they moved it lower in the engine bay. Even so my 04's lasted over 12 years before it popped so I wouldn't worry too much about it. Yours looks like it may have been replaced already.

    O-rings aren't too bad to do in the EATC. I did mine in about an hour all in. Bring it inside and do that surgery in a nice clean well lit area.
    2017 Buick Enclave 3.6 (Burgundy/Beige)
    2019 Volvo S60 Inscription (Crystal White / Blond)
    Past Panthers
    1989 Grand Marquis LS (Cabernet/Grey), 1989 Lincoln Town Car SS (White/Blue), 2004 Mercury Grand Marquis Ultimate (White/Black)

    Quote Originally Posted by Lincolnmania View Post
    if its got tits or tires it's bound to give you trouble

  7. #27
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    EATC o-rings are super easy on '03+. On '02- the assembly is slightly different, so the '97 EATC unit I put in the Ice Car was upgraded to the '03 vacuum actuator assembly. I didn't think I would be able to break the little spot weld and get it back together properly. That's the plan when I get around to it; retrofit the '03+ assembly into my stock '98 control head. So far it isn't bad enough to bug me though.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  8. #28
    I post a lot...
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    Mine was bad, stuck on full defrost no matter what the setting.
    2017 Buick Enclave 3.6 (Burgundy/Beige)
    2019 Volvo S60 Inscription (Crystal White / Blond)
    Past Panthers
    1989 Grand Marquis LS (Cabernet/Grey), 1989 Lincoln Town Car SS (White/Blue), 2004 Mercury Grand Marquis Ultimate (White/Black)

    Quote Originally Posted by Lincolnmania View Post
    if its got tits or tires it's bound to give you trouble

  9. #29
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    I gave the car a good wash yesterday which gave me a chance to closely look the car over. There has definitely been some paint work done which suggests that, at least, the driver side fender has been replace and possibly the hood.
    You can see it in the pictures if you take note of the missing pinstripe on the driver side fender and overspray that covers the pinstripe on the front half of the driver door. Not exactly a good pant job. Also while cleaning the front bumper much paint came off revealing a bumper that looks 22 years old (possibly not original to the car). This tells me that whoever did the paint job didn't do good prep work at the very least. Also, along the molding on the passenger door I can see where the new paint layer doesn't cover the original (right up against the molding, not noticable unless you really look. This actually has me a bit confused since the passenger side fender doesn't appear to have been painted.

    I'm not complaining, since it is nice to have rocker panels. I just find it strange and it also explains why there is an alignment issue between the front and rear driver side doors. The front of the rear door sticks out just a little past the rear of the front door.
    Last edited by VicCrownVic; 03-06-2020 at 11:49 PM.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  10. #30
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Default EATC O-ring Replacement with Vac Actuator Assy Retrofit

    I grabbed an EATC vacuum actuator assembly from a 2004 MGM today. Replaced the o-rings and retrofit it to my '98 EATC control head.
    The reason I prefer the '03+ vacuum actuator assembly is that servicing the o-rings is easier. The '02- units have a frame that gets in the way while the '03+ units are free of obstruction.
    Also, it's cheaper to get just the vacuum actuator assembly instead of the whole control head.

    '04 unit on the left, stock '98 unit on the right:
    Click image for larger version. 

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    For the retrofit the first thing to overcome is the '02- units having an eight pin connector while the '03+ unit has a 5 pin connector.
    Last time I did this I spliced the eight pin connector to the newer unit, but I found there is an even easier way. After verifying that each of the ground pins were in the same position on the connector and each went to the same actuator on both old and new units (the actuators are ground controlled, the newer units share positive while the older units unnecessarily have separate positive feeds to each actuator). It turns out that the only modification needed is to cut off a little tab on the new unit's electrical connector.
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    Once that is done, plug the new connector to the old board and you will have 3 unused pins on the board.
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    The other modification needed is making the new unit mount to the old EATC case. This requires drilling two 3/16 holes in the back of the control head case.
    To locate the new holes, position the new unit, then trace straight down from the mounting screw holes on the new unit, and straight over from the existing holes on the back of the case.
    If you put the new unit in place while drilling the new holes, be careful not to drill to far and ream out the new unit's mounting holes
    Click image for larger version. 

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    I didn't get it exact as you can tell but, once the screws were in, my new holes actually are positioned good enough.
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    I found a 2006 MGM but the vacuum actuator assembly looked the same as '02- units. I suspect that the car may have had the control head replaced since it was obvious someone had been in there (chewed up release tabs, missing screw) unlike my '98 where nothing was out of place and the electrical connectors didn't want to let go.

    I may have forgotten to plug the vacuum actuator electrical connector in. My system was on default and couldn't change modes. Took it back out, found my mistake and all was working as it should.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  11. #31
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Wiper motor on a box is about a million times easier. Even the last one that I did, which I modified the harness on the car to accept the single connector '95 part number motor.

    It turns out the closeout '95 part number motor doesn't line up exactly right on my '98. I swapped the mounting plate from my '98 motor onto the '95 motor, and with it installed the wipers parked up further than normal and the driver side wiper wiped the A-pillar. It didn't matter which motor arm I used. So apparently (I didn't make any measurements to confirm) the motor output shaft must be located slightly different in relation to the mounting plate-to-motor bolts. Swapped the new motor arm and what I assume is the parking mechanism onto the '98 mounting plate and onto the '98 motor. Wipers park in the correct spot and don't wipe the A-pillar. Time will tell if I actually did anything useful. Before all of this the wipers would park in the full up position, but not all the time. So far they have parked properly each time.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  12. #32
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Wipers haven't acted up yet, they park like they should so I think I can call it fixed. I think someone messed with the wipers in the past. likely when the driver side fender was replaced (and possibly the hood) and painted. The passenger side wiper seems to not aligned quite right, like the wiper arm is off by a tooth at the base of the arm.

    I ordered a crankshaft position tool and camshaft holder set. I don't immediately need them, but at some point in the future I'm sure I will. I'm currently at 64K miles and change, what is the typical lifespan of the original timing chains, guides, and tensioners? Since I still have the original intake would it be worth replacing timing chains, guides, and tensioners while I'm replacing the intake or not really worth the time at 64K miles? Still need to order the intake. I'm a fan of keeping things easy, but if I end up going with a PI intake do I only need to get the coolant tube and nipple thing that lives under the intake (from an '03-ish in the JY)?
    Click image for larger version. 

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    Also ordered a 1998 service manual and EVTM. Got a really good deal on them, and everything appears to be there and in decent shape.
    Click image for larger version. 

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    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  13. #33
    Riding on air! mercurygm88's Avatar
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    I think the '01-'03 timing chain guide and tensioner issue is more of an if than a when problem. I've heard multiple things. A. It's a 2001-2003 specific issue. B. It could happen with any 4.6 C. It's a 2003 only issue. I lean towards it's a lot like the self ejecting spark plug issue, it could happen but it's not necessarily ever going to happen to one particular engine. My '01 Town Car had 140k on it with original guides and tensioners and was perfectly quiet and running fine when I traded it in. I bought my '03 TC at 69k miles and it had already had them done, it had the x and three dashes on the valve covers. My current '02 LSE I don't know about. I have service records stating that the oil pan, intake, and valve cover gaskets were replace in May of 2019. Certainly it wasn't leaking from all those places? It hasn't burned or leaked any oil in the 6 weeks I've had it and I've put about 1200 miles on it already. So I'm thinking maybe that work was done with all the gaskets. I do have the intake with the aluminum crossover so that was done at some point. Either way it's at 98k miles and sounds and runs just fine.
    2002 Mercury Grand Marquis LSE - Purchased 02/19/20 at 96,500, current Daily Driver.
    2003 Lincoln Town Car Signature Series - Purchased 07/29/19 at 69,500, sold 2/14/20 at 85,500.
    2001 Lincoln Town Car Executive Series - Purchased 04/18/15 at 108,653, traded in 05/02/16 at 139,000.
    1995 Mercury Grand Marquis GS - Inherited 10/2009 at 105,000 totalled 4/30/10 at 120K, My dumbass fault.
    1988 Mercury Grand Marquis LS - Purchased 6/26/11 at 82,610 totalled 4/16/15 at 137,000, Not my fault.

  14. #34
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    I was leaning toward probably not worth the time to do timing chains and hardware since I don't have any funny noises or any reason to believe that they are warn, and I'm currently sitting at 64K miles.

    22 year old plastic on that intake is definitely a ticking time bomb, but hopefully it will be fine until I pre-emptively replace it. I still have The Scab and The Ice Car (until I decide to permanently retire it) for backup if that intake does decide to become problematic.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  15. #35
    No mean-spiritedness here. IPreferDIY's Avatar
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    My understanding of the timing chain tensioner issue is that it was "some" 00-03:

    http://www.grandmarq.net/vb/showthre...-2003-Panthers

    I've never seen anything about an issue with the chains themselves. I would figure they could go for at least 300,000 miles. The same may be true for guides, arms, and tensioners for 98, but don't hold me to that. I once saw or heard something about the issue being a bad batch of nylon on the tensioner arms, and I don't recall ever seeing an issue for pre-00.

    The PI intake swap by itself does not seem to be worth it for normal driving. The gains seem to be in the high RPM range. OTOH, PI camshafts might provide a decent complement for the PI intake, but I don't know. You could put PI heads on, but that reportedly requires use of high octane gas due to an increase in compression.

    If you do the PI intake swap, you should get a new nipple, and you might want to consider a new heater pipe. At the least, make sure any used pipe is in good shape, and maybe even give it a coat of high heat paint. You might be good with any 01+ heater pipe. They did change something at some point (I think 04), though it might still bolt up the same way. The only other thing I can think of for a PI intake swap is RTV on two of the coolant ports.

    Regardless of which intake you use, what would definitely be worthwhile (at least for those with dual exhaust) is porting and polishing the plenum and swapping the TB for a 70mm model. You might want to get a used plenum and work on it at your convenience so it's ready to go:

    http://www.grandmarq.net/vb/showthre...um-(with-pics)

    2000 Grand Marquis LS HPP, a hand-me-down in 2008 with 128,000 km; 175,000 km as of July 2014
    mods: air filter box "tuba" (in place of the "trumpet"), headlight relay harness, J-mod (around 186,350 km), 70mm throttle body, NKL4 PCM (from a 2000 CVPI, nothing great there apart from highway cruising), KYB Gas-A-Just shocks (after >202,000 km on originals)

  16. #36
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    Thanks for the info. I'm only planning on this being a daily driver, so I'm not too worried about going with an improved (metal crossover) NPI intake to replace my original, plastic crossover, NPI intake.
    Although, if I decide at some point down the road to have some fun with the car, those modifications you have there look to be within my skillset.

    There are two kits that I have come across.
    F8AZ-9424-BAA which I assume includes the NPI manifold (https://www.tascaparts.com/oem-parts...re-f8az9424baa)
    and
    1W7Z-9424-AAA which I assume includes the PI manifold (https://www.tascaparts.com/oem-parts...re-1w7z9424aaa)

    I've been looking over Ryan's write up on manifold replacement/PI manifold upgrade. With a 5.0 I can look at a write up like that and not be lost, I'd know the finer details even if they were missed in the write up.
    With a 4.6, I feel like I miss details that are right in front of my face in the write up because I can't imagine a 4.6 in my head like I can a 5.0. lol
    I think the thought of modifying something I'm not at all familiar with seems a bit intimidating, even though I may be capable.

    While attempting to write this post I did more digging, and I guess it wouldn't be that bad to do the NPI manifold. It looks like I can get that coolant tube and nipple on Rockauto. Both Dorman parts but I assume, unlike the intake manifold itself, that these parts are ok?

    I was a bit hesitant at the idea of removing the water pump to replace the nipple, but I'm used to the 5.0 where every accessory attaches to at least one point on the water pump. The 4.6 water pump is just a few bolts and that's it?

    I'm sure I'll have plenty more dumb questions since I know absolutely nothing about anything 4.6 specific.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

  17. #37
    Road Warrior Kodachrome Wolf's Avatar
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    FWIW, the timing chains and guides have never been done in my '97. Have nearly 220K on the clock and it runs good with no weird noises. Seems to be the later design stuff that usually needs more attention for longevity there.

    My Cars:
    -1987 Grand Marquis Colony Park LS (325K Miles) - April 2017 + September 2019 POTM Winner
    -1989 Sable LS Wagon (88,710 Miles) - Sold
    -1997 Grand Marquis LS (222K Miles) - The Daily Workhorse & March 2015 + January 2019 POTM Winner

  18. #38

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    Iíve heard 02 was a bad year for the timing chains on the 2v, just throwing that out there.

    I would do the manifold swap, its only a matter of time before the npi plastic crossover fails. And a pi intake canít be beat. Theyíre readily available and not too expensive. Installing one on npi heads isnít bad, the biggest thing to remember is that the coolant ports are different shapes so a little bit of rtv needs to be added along with pi gaskets but otherwise its not bad.


    Sent from my iPhone using Tapatalk

  19. #39
    Riding on air! mercurygm88's Avatar
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    Vic even if your not planning on doing any real work to your engine I highly recommend this book. I learned a ton from it. I donít know how knowledgeable you are about the modular motors but I knew nothing about them when I got my Ď95 MGM back in 2009.

    Some of the more interesting things I learned

    All mod motors have aluminum heads, pretty common knowledge but I didnít know back then.

    Cross bolted mains with jack bolts on the Romeo (cast in Cleveland) blocks. So effectively 4 bolt mains.

    You can change the oil pump without pulling the pan.

    The stock cams are hollow tubes with the lobes pressed on.

    It also covers the myriad of Windsor/Romeo interchangeability issues.

    The bore and stroke of the 4.6 is nearly square. 3.552Ē x 3.543Ē

    Externally a 4.6 is nearly as big as a 460 being 4Ē shorter, the same height and only 3/4Ē narrower. The DOHC is both wider and taller.

    https://www.amazon.com/4-6L-5-4L-For.../dp/1613252285

    I also found this YouTube video while a bit long very interesting.

    https://m.youtube.com/watch?v=hU-5vx...st_app=1&app=m

  20. #40
    2 decades of DDing Box Panthers, now in a Whale VicCrownVic's Avatar
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    I've actually came across that video a while ago (someone here probably posted it before). Tried to listen to it figuring some day I would own a 4.6. I listened to it while at work so didn't hear it all and wasn't paying close attention. Perfect time to watch it now.
    That book looks like a great resource, and should nicely compliment my service manual.

    Great info from all you mangs. As a 4.6 n00b, I really appreciate it.
    Vic

    ~ 1998 Mercury Grand Marquis LS - new DD
    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - returning summer 2020, I finally have an engine
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - Rotting Retired Winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic

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