Clean Engine Sludge in 2 hours. — Vehicle maintenance news
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Audizine Forums
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Engine Sludge Removal - Maintenance/Repairs - Car Talk Community
Cleaning engine oil sludge to improve engine performance and protection
Changing valve cover gasket and noticed all this soft black gunk in around cams. I've never seen this before, is it a bad sign? Engine is a 1jz with about 90k miles,
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Engine Sludge...Act quickly, or it'll kill your engine. - Cost Effective Maintenance