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Old 10-05-2022, 07:51 PM
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Join Date: Oct 2007
Posts: 7,261
Need help! 617 N/A rattling louder after head gasket replacement

The car came to me with a leaking head gasket, as well as almost every other seal/gasket. Also, the engine was painted orange, so we decided to paint the engine bay while the engine was out. http://www.peachparts.com/shopforum/diesel-discussion/417458-how-not-install-crankshaft-seals.html After replacing all the seals/gaskets and painting the engine and bay, the rebuilt head was installed on the block, and the engine installed in the bay. After getting the engine running, it was knocking very loud. I re-adjusted the valves (several were loose), and retarded the injection timing a bit. I initially had it set at 24 degrees BTDC. I reset it to 23 degrees BTDC. It seemed to be a little quieter, but the #1 injector was louder than the rest. I replaced it with another one, and that quieted that cylinder down a little more. It still sounded like a rod knock, so I removed the lower pan and replaced the #1 con rod bearing. It did not look terrible, but I wanted to rule out a bad bearing. Please view the video and tell me what you think. Could it be too much compression? Could it still be too far advanced? (book calls for 23-25 degrees BTDC). I can't give the car back to the owner sounding like that.

https://youtu.be/e_KCy8a2_UM
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