Hydraulic Roller & Lifter Noise?
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Hydraulic Roller & Lifter Noise?
My NEW SBC has a Comp Cams roller cam. I am running new O.E.M. Chevrolet roller lifters. I have noticeable lifter noise (tapping). Motor has less than 2 hours on it. My engine builder says this is normal for a roller... I have never had a roller but have never heard that a roller makes noise like a solid lifter cam does....Is he nuts or am I mistaken.... Kinda hard to push the issue with a strong headed builder when he has your warranty (6 mo. parts) and you don't know if he is correct or not.....Thoughts anyone???
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Roller cams do NOT make noise like a solid tappet cam. In fact they are usually quieter. Something is wrong.
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Originally posted by insptech
Roller cams do NOT make noise like a solid tappet cam. In fact they are usually quieter. Something is wrong.
Roller cams do NOT make noise like a solid tappet cam. In fact they are usually quieter. Something is wrong.
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Thats is where I would look first. Try to adjust the rockers, it may be just that simple. But, take a look at the amount of stud threads that is sticking out of the top of the adjuster nuts after you did the adjustments. They should all be sticking out about the same. If 1 is much higher than the others, you could have a problem with that valve, lifter, push rod, etc. Also make sure that oil is coming up to all the rockers through the push rods.
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I agree, check all the rockers for adjustment and even height. Look for any that aren't pushing oil. I don't want to scare you but the last roller motor I saw making noise had twisted a lifter and trashed the cam and the lifter bore.
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Originally posted by insptech
I agree, check all the rockers for adjustment and even height. Look for any that aren't pushing oil. I don't want to scare you but the last roller motor I saw making noise had twisted a lifter and trashed the cam and the lifter bore.
I agree, check all the rockers for adjustment and even height. Look for any that aren't pushing oil. I don't want to scare you but the last roller motor I saw making noise had twisted a lifter and trashed the cam and the lifter bore.
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If the noise stays away and the oil pressure stays up you should be o.k. But watch the oil pressure real close-the lifter noise may be a symptom of a bigger problem. Recently it seems a lot of people are having oil filters shutting down due to moisture content in the oil and you may have had that happen. Since the oil to the lifters is restricted that is the first place a loss of oil pressure or volume will show up.
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I would definetly cut the filter open to look for anything that may be trapped in the paper. This is an excellant way of checking for any internal engine parts that are failing. 80 p.s.i. sounds kinda high to me. Are you sure that the builder used a high volume and not a high pressure pump? Also ask your builder if he used any type of oil restrictors in the block.
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You said the noise went away after you changed the oil filter. What filter are you using? I would try a "racing" type oil filter that has less resriction to flow. Like a Fram HP-4 or WIX racing.
Eric
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