ak diesel driver
6.5 driver
So last fall I picked up an 07 MDX for $500 for a replacement for my wife's 04 MDX which has 315k on it. They said it had a rod knock. We started it up and drove it on the trailer, it clattered really loudly. Even back then my thought was it just didn't quite sound like a rod bearing.
During the winter I did some research and discovered that it could also be a bad camshaft. I watched a YOUTUBE video where a dealer had replaced an engine because of a rod knock. The video was of a complete teardown of a 3.7, which turned out to have a bad camshaft. Even losing metal into the oil the bearings looked really good.
So fast forward to a couple of weeks ago I pulled it in to at least see what was wrong. First thing I did was pull the valve covers and everything looked OK. So I turned the engine over with a ratchet, and every so often I would hear this distinct tap.
So I decided to pull the oil filter and cut it open. It was clean, drained the oil and the magnet on the plug was clean.
So I pulled off the timing cover and found this
Replaced those parts and it runs good, nice and quiet, hard to believe that the tensioner could make that much noise.
During the winter I did some research and discovered that it could also be a bad camshaft. I watched a YOUTUBE video where a dealer had replaced an engine because of a rod knock. The video was of a complete teardown of a 3.7, which turned out to have a bad camshaft. Even losing metal into the oil the bearings looked really good.
So fast forward to a couple of weeks ago I pulled it in to at least see what was wrong. First thing I did was pull the valve covers and everything looked OK. So I turned the engine over with a ratchet, and every so often I would hear this distinct tap.
So I decided to pull the oil filter and cut it open. It was clean, drained the oil and the magnet on the plug was clean.
So I pulled off the timing cover and found this
Replaced those parts and it runs good, nice and quiet, hard to believe that the tensioner could make that much noise.