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American Motors/water in oil
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Question
Hello, got a engine that was just rebuilt, left the valve covers off to adjust valves, rained and water got in oil, alot of water, (not my fault someone else) changed oil but now sounds like could have main knock, could water have damaged bearings? and would just changing crank bearings fix it or is a complete rebuild in order, cam bearings, rod pins, ect.?
How long was the water in the crankcase? Could be rust on the inside got into the bearings and wiped them out after you had the engine running. Mains, rods, camshaft, lifters, cam bearings.
Was the engine cranked or run with the water inside? Probably damaged the bearings and possibly the cam & lifters.
The best thing to do is inspect the main bearings and crank journals; if either are scored, replace them and the rod bearings. Pull a couple of lifters and see it they're scored.
It would be nice to find a boroscope to inspect the cylinder walls, too.
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Kevin Pilotte
Expertise
I can answer many technical questions relating to AMC vehicles prior to 1979. I also have experience with Rambler & Nash vehicles.
Experience
I am a former AMC technician, service writer and service manager. I have worked in AMC dealers in Illinois in the 70's. After college, I was a Field Service Rep for American Motors Sales Corporation, working out of the Chicago Zone office. I traveled to AMC dealers assisting in the diagnosis and repair of AMC vehicles. I was also the Area Training Manager for DeLorean Motor Company. I have 10+ years as an Automotive Instructor. I have modified and restored
numerous AMC vehicles. I have been working on AMC vehicles for over 30 years.
Organizations
I have been an ASE Certified Master Technician since 1975. This includes L1. I am also currently a Toyota Certified Master Diagnostic Technician.
Publications
I have articles in "American Motoring", the official publication of the American Motors Owners Association. They are the largest AMC club in the world.
Education/Credentials
I have a certificate I printed out from a website.
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