Engine knock in 350???

Old November 9th, 2018, 12:48 PM
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Engine knock in 350???

Hello all. Going to check out a 71 Cutlass S hardtop that the owner claims has a knock in the engine. Does anyone have any advice on how to determine if it's in the top end or lower? Don't really want a project where the whole engine needs to be rebuilt. Any thoughts on what to look (and listen) for would be most helpful! .
Thanks and have a good weekend!
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Old November 9th, 2018, 01:03 PM
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Knocking could be many things .
If you can, post a video of it running here. Their are usually guys here from all time zones , all over the world here. You will get a better answer to your question that way.
If its a rod you'll know it .

Eric
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Old November 9th, 2018, 01:04 PM
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I will certainly try to do that for sure. Thanks in advance
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Old November 9th, 2018, 01:37 PM
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You can pull plug wires one at a time while running and see if it goes away identifying a rod bearing knock.
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Old November 9th, 2018, 05:10 PM
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Originally Posted by prosperous90 View Post
.....the owner claims has a knock in the engine. .... Don't really want a project where the whole engine needs to be rebuilt. !
sounds like this is not the car for you
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Old November 9th, 2018, 10:59 PM
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I had a knock in my 71 Cutlass and it turned out to be the timing chain slapping because of excessive play from the nylon teeth had worn off the gear. I replaced the gears and chain and solved the problem. I also dropped the oil pan to clean all the plastic fragments from the gear.
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