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Thread: 1978 Grand Marquis

  1. #141
    Member Grand1's Avatar
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    Got the Comp cams adjustable pushrod, the one I had...if for the birds. I put my stock pushrod (8.55) next to the two pushrods I purchased (8.62 according to Rock Auto)....and the new pushrods are shorter? So either RockAuto spec is wrong, or my past pushrods is not 8.55.

    The new pushrods part number is Sealed Power 3252, according to this link, they are 8.64:
    https://www.summitracing.com/parts/slp-rp-3252 Guess, I will buy one for $2, and pay $8 for shipping. Lol

  2. #142
    Member Grand1's Avatar
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    Ok, I think I figured it out, any comments would be cool.
    Turns out I never had a 8.55 stock pushrod in my valvetrain. Picture below, left to right:

    1. First , are the new stock 8.55 pushrods, causing loose rocker arms and chatter.
    2. Second is the 8.62 pushrod I bought for scale.
    3. Last is my old pushrod I decided to compare...notice how it is of substantial length. Weird! I took the Comp Cams pushrod and got 17 revolutions, which comes out to
    17* .05 + 7.8= 8.65!
    Click image for larger version. 

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    So I scoured the internet and lone and behold found a Sealed Power pushrod that's 8.693:
    https://www.jegs.com/i/Sealed-Power/844/RP3164/10002/-1
    Last edited by Grand1; 06-22-2018 at 07:18 PM.

  3. #143
    I'm an air-conditioned gypsy gadget73's Avatar
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    any reason for not buying the Comp ones in the length you need?

    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. #144
    Member Grand1's Avatar
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    The 8.62 Sealed Power Pushrod I already purchased, came out to that exact length, when checking it with the comp cams pushrod checker. I will make sure to measure the new ones....that and there is about $100 difference in price.

  5. #145
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    Gadget, is it ok to skip hardened pushrods sine I don't have guideplates?

  6. #146
    I'm an air-conditioned gypsy gadget73's Avatar
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    yeah as long as it doesn't ride on a guide you don't need a hard pushrod. Thats purely for wear resistance. Understand $100 difference in price for sure.

    What heads are these, the stock 1978 ones, or did you change them to some other casting? If its not from the same year, any idea what that year engine wanted for pushrod length? Just thinking if these are stock heads, I wouldn't expect the rod length to change unless you have a reduced base circle cam in there.
    Last edited by gadget73; 06-23-2018 at 01:39 PM.

    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

  7. #147
    Member Grand1's Avatar
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    I put on different heads (same head each build)..... Dove-C (the smaller chamber 75cc)Heads. Form what I can tell, thats 1970....have heard guys running up to 670 h through them, that's crazy ! The thing that is completely perplexing to me, is that the pushrods that I put in on my first build we're not stock, so I just happened to get the right size pushrods, inadvertently?

  8. #148
    I'm an air-conditioned gypsy gadget73's Avatar
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    yeah 1970 (D0) Lincoln (V) Engine (E), version or revision -C.

    Any idea what the 1970 pushrod length is? I just wonder if thats where you ended up.

    If they were the right length last time but too short this time, something changed. Either a thicker head gasket by a lot, or shorter valve stems. I'd guess shorter valves, a head gasket that thick would be stupid. If the cam changed, it may be a different base circle on the cam, or its some mix of all of that.

    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

  9. #149
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    Bought the heads used...so after a valvejob and resurfaced heads, may have been done before. Used the same head gasket as last time FelPro permatorque. Will put them in and throw a video up soon. Take a look here


    https://books.google.com/books?id=te...%20460&f=false

    Thanks Gadget
    Last edited by Grand1; 06-23-2018 at 09:34 PM.

  10. #150
    Member Grand1's Avatar
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    Success.
    She purrs like a kitchen...no valve train noise! Ready to roll out.


  11. #151
    Approaching 2 decades of DDing Box Panthers VicCrownVic's Avatar
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    Nice!

    Now, what are you doing August 25? It looks like the local gang will be gathering while TecNickal is in town.
    Vic

    ~ 1991 Mercury Grand Marquis LS "The Scab" - plenty of rot, summer DD
    ~ 1997 GMC Yukon - wannabe winter DD - I'll fix it eventually
    ~ 1991 Mercury Grand Marquis GS "The Ice Car" - My rotting winter DD
    ~ 1989 Mercury Grand Marquis GS - Rotting Retired DD
    Gone but not forgotten:
    ~ 1988 Country Squire ~ 1987 Ford Crown Vic


  12. #152
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    Thanks for the invite, will be there!

  13. #153
    GMN Regular DerekTheGreat's Avatar
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    Very nice, congrats on sorting that out yourself man! "We get by with a little help from our friends."
    1985 LTD Crown Victoria - SOLD
    1988 Town Car Signature - Current Party Barge

  14. #154
    I'm an air-conditioned gypsy gadget73's Avatar
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    Good deal.

    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

  15. #155
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    Below
    Last edited by Grand1; 07-12-2018 at 08:45 PM.

  16. #156
    Member Grand1's Avatar
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    Thanks for all the advice. Glad I cleaned up the exhaust bump on the heads.+one less pulley
    It's louder, and faster.

    Going to replace the carpeting with mass backing/ sound deafening ad I cant hear my radio. The cellphone audio does not give it justice, get a better video up soon.
    Last edited by Grand1; 07-12-2018 at 08:45 PM.

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