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L20B Knocking at 3k rpm


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I have a 1980 720 with a l20b and it starts knocking at 3k rpm. I do get one clunk in the morning when its been sitting over night but thats it. And it eats oil, every 500 miles I end up putting a little under a quart in. The engine must be burning it cause the outside is spotless, but it still passes smog with flying colors so I don't know? The guy I bought it form said he did an over haul and that was at 198k miles now it has 208k miles.

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Pull the plugs and look at them. That much missing oil and they should be black and you will see smoke.


Take a look under the motor and transmission for oil. Place some cardboard under it at night and check for drips in the morning.

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