Why do we worry about LIM gaskets?
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Originally Posted by clm2112
Originally Posted by Hans
that is really bad. the coolant passage is blocked!!!???
Now, is Dex-Cool corrosive? When I took down my project motor, the cast aluminum rear cover was severely pitted where it seals the coolant passages in the block. Kinda like the Dex-Cool ate the aluminum,
As for pitting:
Even the junkyard LIM I picked up for my porting project isn't that bad:
I ground out all the corrosion with a brass wire brush. It was all within the limits of the gasket hole, so I figure it should be safe from leaking.
Finished the job; had to replace leaky valve cover gaskets, too (ain't that sickeningly stock engine pretty?):
I also found my vacuum leak; the vacuum boot on the TB has a slight split, so I stuck a hose clamp on it:
Now my LTFT'* scan at 0% to 3%, instead of the 7%-10% they were before.
The car is peppier, but that may have more to do with fixing the vacuum leak. In any case, now I know I'm not moments from LIM disaster!
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