Kev.O Posted October 17, 2009 Share Posted October 17, 2009 I've removed my turbo today as somehow the gasket has been eroded away: Can anyone help me/explain what would have caused the gasket to end up like this? I only noticed it when the boost started to come online later and later. On a more positive note, my T61 Precision blades were perfect (I've only done 1500 miles) and my SP manifold is looking fine: I have been contemplating one of the new billet turbo's, something like a 6262/6265 but I'm not sure whether the turbo would foul the manifold like on Jamie's car Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 17, 2009 Share Posted October 17, 2009 (edited) I would get both faces machined flat before fitting another gasket bud, thats not a lot of miles to lose a gasket, what manifold is that? looks different to mine, the flange looks closer to the suspension turret which is what you want with fitting a H cover, billet or non billet makes no odds, its what cover you go with that causes the fitment issue. Edited October 17, 2009 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 500 of those miles were the run in miles aswell, so the turbo seen very little boost during that time Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 17, 2009 Share Posted October 17, 2009 The faces wont be true mate, i edited the post above to add some information about the fitment of the new turbo;) Quote Link to comment Share on other sites More sharing options...
jevansio Posted October 17, 2009 Share Posted October 17, 2009 Kev if you want to know for sure, I can ask Michel if I can test fit the new turbo to my old manifold (as he bought it from me), if I can fit a T67 H-Cover on you should be fine fitting a T67 whatever cover on it Quote Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2009 Share Posted October 17, 2009 Either the faces are warped or the fasteners have loosened after a few heat cycles and lifted the turbo. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 Kev if you want to know for sure, I can ask Michel if I can test fit the new turbo to my old manifold (as he bought it from me), if I can fit a T67 H-Cover on you should be fine fitting a T67 whatever cover on it I just asked that in the other thread, that swould be great, thanks Jay. Failing that I could always bring my manifold up north with me once you receive the turbo. I would get both faces machined flat before fitting another gasket bud, thats not a lot of miles to lose a gasket, what manifold is that? looks different to mine, the flange looks closer to the suspension turret which is what you want with fitting a H cover, billet or non billet makes no odds, its what cover you go with that causes the fitment issue. I would only get the 2.5 inch housing as I'm running a CW SMIC. So in theory I shouldn't have any issues. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 Either the faces are warped or the fasteners have loosened after a few heat cycles and lifted the turbo. The fasteneres weren't tight when I removed the turbo but I put that down to the fact that when they were tightened, there was an extra 2mm of metal between the two faces, which has now disappeared. Quote Link to comment Share on other sites More sharing options...
Miguel Posted October 17, 2009 Share Posted October 17, 2009 It wouldn't be the 1st time I have seen them come loose after a few heat cycles. Always worth checking after a few miles of use. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 It wouldn't be the 1st time I have seen them come loose after a few heat cycles. Always worth checking after a few miles of use. I'll make sure I keep a closer eye on them in future. Thanks for the heads up Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 17, 2009 Share Posted October 17, 2009 I just use an exhaust sealer on the joint, not had any leaks in 18 months, this seems to happen to a lot of turbo manifold gaskets, used to get this problem with my old 200SXs. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 I just use an exhaust sealer on the joint, not had any leaks in 18 months, this seems to happen to a lot of turbo manifold gaskets, used to get this problem with my old 200SXs. Can you recommend any particular brand please? Quote Link to comment Share on other sites More sharing options...
Homer Posted October 17, 2009 Share Posted October 17, 2009 Had the same on mine Kev. The exhaust manifold face was not completely flat, it should have been machined (my fault). Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 Had the same on mine Kev. The exhaust manifold face was not completely flat, it should have been machined (my fault). I'm going to remove the manifold tomorrow and find somewhere local to get it checked along with the exhaust housing. CW did recommend I check it before I fitted the manifold. He suggested using a piece of glass. I guess my spirit level didn't cut it Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 17, 2009 Share Posted October 17, 2009 Can you recommend any particular brand please? Just a std Hermatite exhaust assembly paste. just took a file to my manifold and kept checking it with a straight edge. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 I wonder if anyonme could answer the following: Would a new billet wheel fit inside my standard exhaust housing? If it does then I could order a 0.68 a/r housing and if I didn't like it swap it with my 0.82 a/r housing. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 17, 2009 Author Share Posted October 17, 2009 Just a std Hermatite exhaust assembly paste. just took a file to my manifold and kept checking it with a straight edge. Nice one, thank you. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 18, 2009 Share Posted October 18, 2009 That type of gasket failure, as others have said, is due to a loss of clamping load and hot gasses escaping and literally burning up the gasket. Whilst everyone is saying, and rightly, check the manifold flange for trueness, you MUST also check the turbine housing flange for straightness, as that may well be warped. If you have a steady hand and eye you can true them up on a decent industrial quality belt sander, or they can be milled or surface ground true. Some designs of tubular manifold will always pull the flange though, and it will just keep happening. Expensive ones have slip joints to allow the pipes to expand and contract unequally without loading the turbo flange. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 18, 2009 Author Share Posted October 18, 2009 That type of gasket failure, as others have said, is due to a loss of clamping load and hot gasses escaping and literally burning up the gasket. Whilst everyone is saying, and rightly, check the manifold flange for trueness, you MUST also check the turbine housing flange for straightness, as that may well be warped. If you have a steady hand and eye you can true them up on a decent industrial quality belt sander, or they can be milled or surface ground true. Some designs of tubular manifold will always pull the flange though, and it will just keep happening. Expensive ones have slip joints to allow the pipes to expand and contract unequally without loading the turbo flange. Thanks for the reply Chris. I have checked the turbine housing today and it seems pretty perfect. The manifold however is out. The centre section between the twin scroll area is also high, but in theory that shouldn't cause an issue as the housing isn't twin scroll. I'll get it all flat before re-fitting it back onto the car. Quote Link to comment Share on other sites More sharing options...
dude Posted October 19, 2009 Share Posted October 19, 2009 Re the fittment of housings the 76 DBB billet is a lot smaller than my old 74 GTS !!!! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.