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    #1

    Semi HO update

    Well, I pulled the upper and the valve covers. The post run ticking and the valve tap may be one in the same. With the covers off, after i trun the motor with the starter I pinpointed the ticking to the rockers. It feels like theres something tapping on the other end of the pushrods, or valve stems. I checked all the rockers are tight. The pushrods have no slop in them. The motor isn't turning, so the cam is stationary. I believe this leaves two things, My valves are sticking, or the lifters are sticking. I have never heard of anything like this, this is exactly my kind of fucking luck. If its lifters, fine, I'll pull the manifolds and pushrods and replace them. If its the valves, I swear I'm going to fuckin lose it. I have no idea where to go from here to narrow it down. It will run untill it gets warm then it wants to quit.

    Should I seafoam it and hope for the best?
    Should I just pull the whole damn thing down and replace the lifters and get a valve job?

    Right now I'm about to just say fuck it. I'm starting to think somebody ripped me off and sold me heads with some issues. :cuss:
    1991 GM GS sedan "Love Boat" HO converted, Holley adjustable fpr, 3.27 Trac-lok - RIP
    1991 Colony Park LS "Wally World Express" HO, 3.27 trac-lok - RIP
    1988 grand marquis ls "grey ghoul" - RIP 1992 gm ls "superbeater"- sold 1993 F350 dually 7.3 IDI crew cab flatbed "killer" - RIP
    1994.5 F350 Dually Crew Cab Flatbed, Powerstroke 7.3 "overkill" - Alive and kicking
    1987 Lincoln Town Car "El Presidente" - Resting for winter, gonna be a beast!
    2008 Mustang, no name - belongs to the wifey
    Tags: None
    #2
    i would soak the lifters in oil for a couple days...
    1983 Grand Marquis 2Dr Sedan "Mercules"
    Tremec TKO conversion, hydraulic clutch, HURST equipped!

    Comment

      #3
      Got burnt on parts

      Found the problem.

      Cyls 3 and 8 are 0 compression. Stuck open valves. The "ready to bolt on heads" I bought turned out not to be as advertised. Now I plan to pull the thing down again, and do a complete valve job. the "ticking" was the valves creaking back up to the closed position. The lack of idle was due to two dead holes.

      Beware of buying used heads that are "ready to bolt up". Learn from my experience. I'm now going to eat an expensive gasket set and thats not to mention many, many hours of work.

      Thanks for all the help guys. I'll post when she's done.
      1991 GM GS sedan "Love Boat" HO converted, Holley adjustable fpr, 3.27 Trac-lok - RIP
      1991 Colony Park LS "Wally World Express" HO, 3.27 trac-lok - RIP
      1988 grand marquis ls "grey ghoul" - RIP 1992 gm ls "superbeater"- sold 1993 F350 dually 7.3 IDI crew cab flatbed "killer" - RIP
      1994.5 F350 Dually Crew Cab Flatbed, Powerstroke 7.3 "overkill" - Alive and kicking
      1987 Lincoln Town Car "El Presidente" - Resting for winter, gonna be a beast!
      2008 Mustang, no name - belongs to the wifey

      Comment

        #4
        that sucks

        1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
        2006 Lincoln Town Car Signature. Stock for now
        1989 Ford F-250 4x4 much much more to come, sefi converted so far.
        1986 Toyota pickup with LSC wheels and 225/60/16 tires.
        2008 Hyundai Elantra future Revcon toad
        1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

        please be patient, rebuilding an empire!

        Comment

          #5
          Thanks for posting what the problem was so others can avoid that pitfall. Hopefully the pistons were not damaged from the hung open valves. I doubt they were.

          When you pull it apart again, why not do the full HO conversion?

          Tom

          Comment

            #6
            Dude, that sucks. Dishonest people should be beaten for doing shit like 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 grandpa spec white and cranberry

            1984 Lincoln Continental TurboDiesel - rolls coal

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

            Comment

              #7
              Agreed, a beating would not be unfair. The reason I don't do a full HO, mainly budget. Also, 88grandmarq has posted several times of the very modest, if any, gains by doing the cam, injectors and ecm. I have considered finishing the HO with the cam at a later date. (I already have a mark 7 ecm and 19 lb injectors on the shelf)
              1991 GM GS sedan "Love Boat" HO converted, Holley adjustable fpr, 3.27 Trac-lok - RIP
              1991 Colony Park LS "Wally World Express" HO, 3.27 trac-lok - RIP
              1988 grand marquis ls "grey ghoul" - RIP 1992 gm ls "superbeater"- sold 1993 F350 dually 7.3 IDI crew cab flatbed "killer" - RIP
              1994.5 F350 Dually Crew Cab Flatbed, Powerstroke 7.3 "overkill" - Alive and kicking
              1987 Lincoln Town Car "El Presidente" - Resting for winter, gonna be a beast!
              2008 Mustang, no name - belongs to the wifey

              Comment

                #8
                Only thing is, if the heads, etc are off, its not that much more work to do the cam swap as well. A stocker cam can probably be found fairly cheaply on either ebay or one of the Mustang forums.

                I'm very happy with my HO swap, but that was a complete engine, not a conversion job. At least half of the added power on an HO is from the heads though.
                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 grandpa spec white and cranberry

                1984 Lincoln Continental TurboDiesel - rolls coal

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

                Comment

                  #9
                  https://www.thumperoforangepark.com

                  advance the stock cam 4 deg and get a set of 1.7 roller rockers with teh thumpers, you will have quite a machine
                  scott

                  1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
                  2006 Lincoln Town Car Signature. Stock for now
                  1989 Ford F-250 4x4 much much more to come, sefi converted so far.
                  1986 Toyota pickup with LSC wheels and 225/60/16 tires.
                  2008 Hyundai Elantra future Revcon toad
                  1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

                  please be patient, rebuilding an empire!

                  Comment

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