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2.8 clutch

Discussion in 'Modified Alpine' started by JMSiragusa, Aug 26, 2020.

  1. JMSiragusa

    JMSiragusa Gold Level Sponsor

    That is a good question and a big part of my frustration as I never got a straight answer to that question. We did not machine any surfaces of the manifold, so my guess is that the heads had been previously machined and the original manifold machined to match. My guy just put the manifold on and it appeared to seat, so he assumed it was set right. If it is off, it can’t be by much. I know that I should probably pull it apart and measure, just thinking that the fuel injection might be an easier way to go at this point.
     
  2. 260Alpine

    260Alpine Silver Level Sponsor

    Thicker intake gaskets may work. I remember that Dan R mentioned different bolt lengths also.
     
  3. DanR

    DanR Diamond Level Sponsor

    Just noticed your Modified thermostat housing in this picture..... Hope it doesn't stick too low and you have clearance problems by it hitting the crossmember.
     
  4. DanR

    DanR Diamond Level Sponsor

    In the picture that shows the oil pressure adapter and the filter, I would suggest you "cut" off the finger or tab that is pointing upwards. It serves to "fix" the angle of the filter in a normal position but, for the V6 Conversion in our Alpines it make be more beneficial to remove the finger/tab so you can tilt the filter to a 30 to 45 degree angle which allows more clearance between the filter and the header pipes.

    Also a bit shorter filter will also provide more clearance which helps reduce the possible over heating of the oil in the filter. Just a suggestion.
     
  5. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Dan, yes the thermostat housing is a tight fit, but does fit. I had not thought to cut the finger off. It does fit, but I do have to remove it to install the headers.

    Jim, still considering options, but if we stick with he Offy, we will certainly try different gaskets and be sure that the correct length bolts are used.
     
  6. mr.vman

    mr.vman Donation Time

    Question, What brand of internal clutch release assembling are you using? Also what size master cylinder? I am shopping for an internal clutch release assembling (throw out bearing assembly) for my V6 engine, T5. Thank you in advance. Steve V.
     
  7. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Mr. Vman, it is a Mcleod throw out using the original sunbeam master cylinder. Attached is the literature that came with the car. The PO had installed it and it works well.
     

    Attached Files:

  8. DanR

    DanR Diamond Level Sponsor

    V-man, I believe the 3/4" master cylinder is what they recommend.
     
  9. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Hope everyone had a great Christmas. Thinking about the intake leak problem and had a couple of questions that maybe some on this forum know the answers.

    Why does the gaskets for this engine have the center part that fit over the valley?

    As the bolt holes extend through the center of the manifold and are exposed to the inner cavity, shouldn't these be sealed with something? We did not do this, seems like a prime location for a potential leak.

    The manifold for this engine does not bolt to the heads, internet videos on installing an intake manifold all seem to have bolts that fit into the head, to pull the two surfaces together. In this manifold, we must rely on the downward pull of the bolts to seat against the angled surfaces.

    End rail gaskets are there to keep oil in and do not have anything to do with the vacuum. So if the seal at the ends keep the manifold off the heads, then it won't seal.

    I am going to try the Offenhauser manifold again. The plan is to take the stock manifold off, reseal with hylomar sealant and new gasket. Anyone ever perform a smoke check to find leaks before running the engine. I would like to avoid installing the engine and then finding a leak.

    Thanks for any comments
     
  10. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Does anyone have a picture of the off manifold taken apart. Mine seems to have a very thin seal area at one of the inner bolts. See the second picture. Anyone have any idea if that is normal. Just going through this to see if I can locate any problem areas. Bottom of Offy.jpg Seal Area of Offy.jpg
     
  11. Fergusonic

    Fergusonic Donation Time

    Is that your vacuum leak?
     
  12. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Might be. Sure looks like more of a seal surface is needed.
     
  13. DanR

    DanR Diamond Level Sponsor

    John, I have a lot of PIC's of the OFY.....most are in my PDF that is available in my signature element below my name. GOTO: http://danr.mhartman.net/
     
  14. DanR

    DanR Diamond Level Sponsor

  15. Bill Blue

    Bill Blue Platinum Level Sponsor

    It looks like the seal might be lacking in some bolts holes. Why not seal the bold head?

    Bill
     
  16. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Bill, looks like that should be the plan. Perhaps some sealant in the bolt hole. Picture of the gasket below. The gasket goes over the bolt hole, but that very thin surface just does not seam enough to provide a sufficient seal. IMG_3050.JPG
     
  17. DanR

    DanR Diamond Level Sponsor

    John, I just want to emphasis the bolt pattern for the 2.8 V6 when installing the Ofy 4 BBL Intake.

    The bolt position I have circled in RED is for the shorter of the four utilized for installation.

    If these are not properly installed there will be a vacuum leak even a very small one hardly noticeable.
     

    Attached Files:

    dwolff706 likes this.
  18. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Thanks Dan, will do. Whatever vacuum leak in the prior installation was enough to prevent it from idling. I hope to do a more careful install to prevent such a leak. Anyone know a way to check for leaking before installing everything back in the car. In other words, without running the engine.
     
  19. DanR

    DanR Diamond Level Sponsor

    What cam might I ask?
     
  20. JMSiragusa

    JMSiragusa Gold Level Sponsor

    Dan, it is a comp cam #38-240-4. Supposed to be a mild street cam.
     

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