exhaust manifold problem
Discussion
i have had my manifolds off three times now with no result.the manifold starts leaking after a while then gets slowly worse,it sounds like a tractor untill the engine warms up then its not to bad .its worse when i pull away when on load then it seems ok in the higher rev range ,as any one had the same problem .ive noticed there is a raised area on the manifold where the gaskets fit , i recently looked at a manifold for sale and it was completly flat , does any one have any ideas thanks
Try silicone instead of gaskets? Mines been so good I've even opened the ports up more so there is less area for sealing.
If the ridge was removed they may have been skimmed, check your heads & manifolds with a (proper) straight rule and make sure they are clean before you start. Torque them up gradually as well??
If the ridge was removed they may have been skimmed, check your heads & manifolds with a (proper) straight rule and make sure they are clean before you start. Torque them up gradually as well??
Daz, Ive had loads of problems with my manifolds and touch wood they are now sorted.
The 4 into 1 join has cracked twice on both manifolds, i had to change the gaskets 3 times because the bolts kept undoing them selves and i stripped a thread in one of the heads.
I had both manifolds re welded and the surfaces skimmed by Dulfords TVR (big col
), gaskets by clevor trevor (shinny metal ones), small head arp bolts (act) and nord lock washers.
And im going to copy spend in the winter and open up the manifold ports.
How much did you open them spend?
HTH
The 4 into 1 join has cracked twice on both manifolds, i had to change the gaskets 3 times because the bolts kept undoing them selves and i stripped a thread in one of the heads.
I had both manifolds re welded and the surfaces skimmed by Dulfords TVR (big col
), gaskets by clevor trevor (shinny metal ones), small head arp bolts (act) and nord lock washers.And im going to copy spend in the winter and open up the manifold ports.
How much did you open them spend?
HTH
Hi daz i recently asked a similar question concerning the exhaust manifolds. I have just removed mine cleaned and painted them but was concerned about the manifold faces. They should be a slight raised area on each face but over time due to pressure and temperature this face area has become worn and pitted. Mine are slightly pitted but like you i do not want to be removing them on a regular basis so i think i will get them machined flat. It would be best i think to treat all four faces on each manifold as one ie machine all four and not try to do each face individually. I hope to do this very soon so will post the results at a later date, Tom.
Edited by TJC46 on Friday 3rd October 20:52
daz the plumber said:
the high temp silecone will leak ,its made to seal gaskets but not up to those temps .what i was saying is my manifolds have a ridge but some others ive seen are flat . thanks
And if its the wrong kind you will damage the Lambda probes and poison the cat 
remember all that trouble with that dodgy super market fuel recently? well that was silicon contamination in the fuel and it plays havoc with the Lambda output 
Hughesie said:
Spend & Pasco - if you cant play nicely we have a magic "ban from thread Button"
May i Suggest you put aside whatever differences you have and play nicley, get a room together or we'll put up a dividing wall between you.
Mod
WTF has it got to do with me! It was Pasco & Meatball 'TWAT'ting each other.... Did / Could you actually read the stuff you deleted?May i Suggest you put aside whatever differences you have and play nicley, get a room together or we'll put up a dividing wall between you.
Mod
If I can't quote someones own post back at them, and refuse to give away detail of my own work WTF is this place coming to!!!!!!!!!!!!
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