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Have a Cad. with 45k. In the morning when started, for about a minute I get
that "tick-tick- tick" sound. Was told it's a sticky lifter. Hesitate to add
anything to the oil or is there some additive that is ok to use.
Thanks, Dave
 

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Dave: Lucas makes an oil additive that helps with this. The noise is clearance. The additive takes up that clearance. You can purchase the engine oil additive from Napa, Advance or most auto parts chains. They also have additives for transmissons and steering racks. I have had very good luck with all their products. Don
 

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Which Cadillac, which engine???

Have you owned it since new, using which oil?

Any oil worth putting in, doesn't need an additive, it's already in there.

I wouldn't just throw an additive at a Northstar, certainly not a CTS-V.
 

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From My experience with engines the oil runs out of the lifter when the engine is shut off and sits over night. Then when first started it takes a minute to build pressure inside the lifter. This usually gets worse as metal is worn away from the metal to metal tap tap tap. And then will get to the point of to much clearance and will tap all the time. Usually cam lobe wears, bottom of lifter wear, or spring failure inside lifter. So any good additive should take care of problem. At worst you may have to have the lifters replaced but would do that as a last resort. Happy wrenching. Don
 

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watch out for the oil filter some dont have the anti drain back flapper in them most of the caddis oil filters are at a angle and will drain back to oil pan causing the noise for a few seconds hope this helps you out Don Nelson
 
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