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Classic Truck Discussion Forum

Noisy lifter 1990 Chevy K1500 4.3l v6

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07-28-2019 15:51:16

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I had a lifter get noisy on Thursday on my way home from shopping. Seemed to be noisy around 55mph (5 speed manual. Was not constant came and go, if I dropped speeds it seemed to lessen or go away. I put 5 ounces of Sea Foam in it and haven"t heard the lifter again. Don"t drive the truck much as it"s my plow truck and also used to pick up lumber or bigger objects. I"m thinking of adding some atf and then run it for an hour or maybe a hundred or so miles. I was going to add a quart, but my level is now at the full mark, do I need to try and drain some oil off before I add the ATF. Any other recommendations?

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09-18-2019 07:04:42

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 Re: Noisy lifter 1990 Chevy K1500 4.3l v6 in reply to wsmm, 07-28-2019 15:51:16  
Second the Rislone. It keeps the crank case clean of deposits. Not uncommon to see a Vortec era 4.3 go 300,000+ with a simple distributor and timing chain change.

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08-30-2019 19:09:14

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 Re: Noisy lifter 1990 Chevy K1500 4.3l v6 in reply to wsmm, 07-28-2019 15:51:16  
Maybe try only half a quart of ATF if the level is already at full. You can also buy a little can of a Wynn"s product (I forget the exact wording on it) that frees sticky lifters. Rislone is also excellent for your lifters.

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