leaking head gasket?

S

sjeffers

New member
Location
northern ireland
hi, I have a 1980 montjuic with approx 9k miles. It starts and runs well but has a oil/fuel weep from one of the cyclinders from the exhaust manifold onto the exhast down pipe. Naturally this smokes especially when just started. I believe it has been going on for a while but definately getting worse.
The exhast and 2 x semi circular collars are tight and I have applied a high temp exhast sealant but dosnt make any difference.
Do you think it could be a leaking cylinder head gasket? If so where can I get a good one?

thanks
 
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sjeffers said:
hi, I have a 1980 montjuic with approx 9k miles. It starts and runs well but has a oil/fuel weep from one of the cyclinders from the exhaust manifold onto the exhast down pipe. Naturally this smokes especially when just started. I believe it has been going on for a while but definately getting worse.
The exhast and 2 x semi circular collars are tight and I have applied a high temp exhast sealant but dosnt make any difference.
Do you think it could be a leaking cylinder head gasket? If so where can I get a good one?

thanks
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500s are weak on the head joint side but....
Make sure that the leak isn't originating elsewhere. We recently had oil dripping from the left hand exhaust port of my wife's freshly rebuilt 500.
It finally turned out to be the new rubbers on the end of the cams leaking. Took the cam cover off and rebuilt everything with a bit of gasket goo. Problem solved.

Otherwise, yes, a bad seal at the head/pipe join will produce a venturi that draws oil down the guide.
If your bike really has 9000 miles, guides should be ok, however, valve guide seals could be shot due to under use. 2000 miles a year isn't much.

Paul
 
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