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Location:
Brisbane
Registered:
February 2003
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Re: 7M Head gasket repair pics and advice
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Mon, 10 January 2005 00:18
 
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-Whats the best way to clean the block down in preparation for the new gasket to stop debris from going into the oil, cooling system or getting inbetween the pistons and the bores?
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i'm doing this with my 5M...
-rotate engine around so no pistons are at top of bore (remember whch way you did this so you can return engine to correct TDC position)
-fill each bore with an oil-wet rag, or a paper towel wet in a heavy oil (or wet air filter oil if you have some)
-clean out oil drain holes, fill with a think taper made of rolled-up masking tape (cloth will tend to fall down into sump)
-clean out head-bolt holes with a cloth and narrow screw-driver, you will have to redo this after cleaning the deck
i got a wide metal paint scraper (aluminium would be safer), filed it down so the edge was knife like (they tend not ot be sharp.
gently scraped all gasket material off the block, trying where possible to avoid pushing rubbish into bores or down bolt holes
you'll probably do this in a number of goes, removing less and less as you go
after this, carefully remove the oily rags and masking tape plugs - cleanup using another oily rag (or even greasy) NOT something runny like machine oil or WD40 as it will let the gunk run down into the rings
you might find a vacuum cleaner will help remove loose debris
clean out bolt holes as per previous
clean head with light oil or spray stuff, give bores a light run with engine oil (or gear oil or trans fluid if it will be standing for some time) then carefully clean deck surface with lint-free cloth lightly wet with metho - you'll need that face free of any oil-n-shit otherwise the new gasket will have a short life
... follow rest of TSRM for other parts of head....
i'd not bother cleaning the carbon from the pistons - if you're concerned about the valves, use a mild wire (or brass) wire brush and clean up very carefully.
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