Re: MH 44 - Oil in Exhaust

Posted by RAB on August 02, 2004 at 14:31:50 from (195.93.34.11):

In Reply to: MH 44 - Oil in Exhaust posted by Malcolm Bennett on August 01, 2004 at 16:16:16:

Will be coming past inlet valve gides if it is that which is causing plug fouling. Are you sure the engine breather is clear? If you have any crankcase pressure oil will be pushed past the pistons or through the valve guides. The guides will also be subject to reduced inlet pressure, so may need replacing - or do they have seals on the valve stems?
May also be glazed bores and some good hard work may be a remedy or not.
Are you using a detergent oil? If not the build-up on the piston rings may be causing the problem.
May be that the engine is just getting worn and in need of a rebuild.
Start with the air cleaner, then remove manifolds and check for build-up on valve stems, then delve further.
Rather remove the head and check it all out now than wait until something fails.
Btw, are you using the correct heat grade plugs. One grade hotter might reduce the plug fouling.
And is the engine running on the correct mixture? - too rich and it will not help matters.
Regards, RAB

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