Manifold Leak

Malcolmmer

Malcolmmer

0
Hi All,
Had a leak on the manifold gasket at the beginning of the year. Replaced with new gasket and everything was fine. Went to the Rootes Archive open day at the beginning of September and on the way back I am sure the manifold gasket is leaking again. It sounds the same as last time. I wondered if anybody else has had the same problem and how they fixed it. The van has only done about 1000 miles, probably less.
Any thoughts would be much appreciated..
Cheers Malcolm.
 
It could be that the manifold surface needs refacing. If there's a step between the inlet and outlet manifolds then it won't seal properly. is it the manifold face or the fire ring where the down pipe fits?
 
Used to have this problem (from where it attached to the block). My issue was the nuts loosening so changed them all to brass and sorted it
 
Thanks both for that. When we replaced the gasket earlier this year you could see marks on the old manifold gasket where it had been leaking, so I think it is a good bet the same thing has happened. It certainly sounds the same as before. When we replaced the gasket my mechanic had a feeling that we might have to bite the bullet and have the manifold/head refaced, but thought it was worth a try with a new gasket. If we go down that route I am thinking that I might have my original head, which I have still got, converted to unleaded, have the two faces skimmed as well as the manifold itself ( if that is possible). I haven't spoken to my mechanic yet to see what he thinks, so while I am waiting to hear from him I will take off the heat shield to get to the manifold nuts to check if they are tight. Got to be worth a try. If I have the head converted, any idea where the best place to get good head (Iron head) gaskets from. The manifold gasket we used last time was the one with a metalic type face, I may have a grey fibre type in the cupboard, any idea which is best.
Thanks again for your input. Cheers Malcolm
 
Getting the manifold faces skimmed would be an easy job for a decent machine shop. I usually resort to ebay for most things since the usual suppliers have stopped trading but they will be available elsewhere.

Here's a couple I found



And he's another supplier


Generally I prefer composite head gaskets (I found them much more reliable on A series engines) but never found one for a Commer. The copper faced ones do the job fine but If you do have a decent composite one I'd try that.
 
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