New lifters, lots of noise
06-30-2019, 02:20 PM
#21
07-01-2019, 04:09 PM
#22
Some people have had luck with Rislone Engine Oil Treatment(32oz.).
https://carpassionate.com/best-oil-a...-lifter-noise/
For $7 it's worth a try.
https://carpassionate.com/best-oil-a...-lifter-noise/
For $7 it's worth a try.
07-01-2019, 09:05 PM
#23
Some people have had luck with Rislone Engine Oil Treatment(32oz.).
https://carpassionate.com/best-oil-a...-lifter-noise/
For $7 it's worth a try.
https://carpassionate.com/best-oil-a...-lifter-noise/
For $7 it's worth a try.
01-15-2020, 10:13 AM
#24
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Rebuilt the engine over the winter, all new everything. Engine has good oil pressure 50psi cold, 40psi hot. But the lifters are still noisy. I have hardened pushrods. Checked length multiple times with the comp cams tool. BTR dual .660 springs, summit racing pro LS stage 2 turbo cam. I dropped the pan and put in a new GM oil pickup tube, new GM oil pan gasket, and a new GM blue pickup tube o-ring. Still no change. Oil pressure was verified with a mechanical gauge. Im starting to wonder if my $100 ebay LS7 style lifters are the problem. Could this be a possibility? I can’t think of anything else that could be causing this problem. I’m getting oil to the rocker arms. Not a ton but enough to make a mess if I rev it with the valve covers off. Oil pressure raises with rpm. I’m at a loss here
i just rebuilt my lq4 with SS2 cam and ls7 lifters and am experiencing lifter chatter as well. did u figure out the fix on yours..?
01-15-2020, 12:34 PM
#26
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01-16-2020, 11:38 AM
#27
The reason many newer design aftermarket cams (newer than the 20+ year old ls designs) make great power is because they have quicker lobes (higher velocity/acceleration/deceleration). The downside of that (sometimes) is that they hit the seats with more force, and a lot of times what sounds like lifter noise is actually the valve slamming (relatively speaking) into the valve seat. Also, better/harder/more dense cam/lifter/PR materials tend to transmit more harmonics than softer factory metals.........sort of like the difference between transmitting a frequency through rubber, then through glass or a very dense metal. If that makes sense. Either way, higher performance comes at a cost. Sometimes it's more heat, sometimes it's more broken parts. Sometimes it's more noise. But if everything seems ok with your build, I wouldn't sweat the lifter noise much.
01-16-2020, 12:16 PM
#28
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The reason many newer design aftermarket cams (newer than the 20+ year old ls designs) make great power is because they have quicker lobes (higher velocity/acceleration/deceleration). The downside of that (sometimes) is that they hit the seats with more force, and a lot of times what sounds like lifter noise is actually the valve slamming (relatively speaking) into the valve seat. Also, better/harder/more dense cam/lifter/PR materials tend to transmit more harmonics than softer factory metals.........sort of like the difference between transmitting a frequency through rubber, then through glass or a very dense metal. If that makes sense. Either way, higher performance comes at a cost. Sometimes it's more heat, sometimes it's more broken parts. Sometimes it's more noise. But if everything seems ok with your build, I wouldn't sweat the lifter noise much.
Last edited by chinaoreo; 01-16-2020 at 12:16 PM. Reason: Edit
01-16-2020, 12:27 PM
#29
i wouldn't sweat it if you have no reason to assume that there's a real mechanical problem with the engine. As long as your preload is correct, rockers are good and torqued properly, and you have no reason to think you have abnormal lifter to bore clearances........I'd chalk it up to "this is just what this parts combo does". Engines/parts/metals have varying and finicky resonant frequencies and your 1500-2500 just might be the weird spot where it transmits sounds much like valve springs have resonant frequencies where they transmit harmonics (for the sake of discussion, because they aren't actually "harmonics"). Or it could just be the seating velocities of the lobes making a little noise at that rpm.
01-16-2020, 12:33 PM
#30
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i wouldn't sweat it if you have no reason to assume that there's a real mechanical problem with the engine. As long as your preload is correct, rockers are good and torqued properly, and you have no reason to think you have abnormal lifter to bore clearances........I'd chalk it up to "this is just what this parts combo does". Engines/parts/metals have varying and finicky resonant frequencies and your 1500-2500 just might be the weird spot where it transmits sounds much like valve springs have resonant frequencies where they transmit harmonics (for the sake of discussion, because they aren't actually "harmonics"). Or it could just be the seating velocities of the lobes making a little noise at that rpm.
09-03-2022, 06:38 AM
#31
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his measurement could be of a bit? He checked for proper push rod length in a TEXT BOOK FASHION! And I'm running all the same exact top end components that he is and 7.400 push rod length is EXACTLY right! I have more noise in the valve train than i would like too but the other gentleman is exactly right it's the nature of these lifters with heavy valve springs. You're just another guy chiming in who has ALL the answers and your way has to be best. Keep building engines from your lazy boy and leave push rod length checking methods to us true gearheads. You did it exactly right my friend don't go through the trouble of tearing it all back down to use this guys whimsical method of checking your pushrod length and I'm running all the same components you are and 7.400 is exactly right