Tapping after engine build!! PLZ HELP!
09-15-2018, 10:40 AM
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Tapping after engine build!! PLZ HELP! I just finished building my 01SS Camaro. New MS3 cam, ported 243 Heads, springs, pushrods,and more..... I'm getting a tapping noise for i believe multiple areas or the engine. Before I built It, it had a mild cam, ls6 intake and headers, and it made no sound and was quite. I didn't replace the lifters while I was in there. All the pushrods are the correct length I think. With just below 1 full turn of preload. Need help. Thanks!
09-15-2018, 10:07 PM
#3
You don’t sound too confident on the pushrods being the correct length. X amounts of turns before preload sounds confusing...? Were you set at zero lash when measuring? New LS7 lifters would have been cheap insurance especially if you’re still running the oem LS1 lifters.
Could also be exhaust leaks that sound like tapping/ticking.
Could also be exhaust leaks that sound like tapping/ticking.
09-16-2018, 10:42 AM
#5
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Milling the heads would tighten up the lash. Tapping indicates loose lash.
09-17-2018, 09:19 AM
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09-17-2018, 09:20 AM
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You don’t sound too confident on the pushrods being the correct length. X amounts of turns before preload sounds confusing...? Were you set at zero lash when measuring? New LS7 lifters would have been cheap insurance especially if you’re still running the oem LS1 lifters.
Could also be exhaust leaks that sound like tapping/ticking.
Could also be exhaust leaks that sound like tapping/ticking.
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09-19-2018, 08:11 AM
#9
Since you are hearing multiple taps then I'd suspect the following:
1. O-ring not sealing at the oil pump. Did you replace the pump and the o-ring at the pickup tube/pump interface? How is your oil pressure?
2. Air pockets in oiling system. Did you prime the oiling system? Did you soak the lifters? Without any idea on how long the new build has been run, have you let the engine warm up to operating temp?
3. Loose rockers or failed trunion bearings.
4. Pushrod length. Did you measure? This is a need to know.
5. Oversized pushrod diameter. I have heard (not experienced) that 11/32" dia & 3/8" diameter pushrods can make contact with the head casting if not clearanced.
Just a few ideas for you to look into. Good luck.
-R
1. O-ring not sealing at the oil pump. Did you replace the pump and the o-ring at the pickup tube/pump interface? How is your oil pressure?
2. Air pockets in oiling system. Did you prime the oiling system? Did you soak the lifters? Without any idea on how long the new build has been run, have you let the engine warm up to operating temp?
3. Loose rockers or failed trunion bearings.
4. Pushrod length. Did you measure? This is a need to know.
5. Oversized pushrod diameter. I have heard (not experienced) that 11/32" dia & 3/8" diameter pushrods can make contact with the head casting if not clearanced.
Just a few ideas for you to look into. Good luck.
-R
09-19-2018, 01:04 PM
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Since you are hearing multiple taps then I'd suspect the following:
1. O-ring not sealing at the oil pump. Did you replace the pump and the o-ring at the pickup tube/pump interface? How is your oil pressure?
2. Air pockets in oiling system. Did you prime the oiling system? Did you soak the lifters? Without any idea on how long the new build has been run, have you let the engine warm up to operating temp?
3. Loose rockers or failed trunion bearings.
4. Pushrod length. Did you measure? This is a need to know.
5. Oversized pushrod diameter. I have heard (not experienced) that 11/32" dia & 3/8" diameter pushrods can make contact with the head casting if not clearanced.
Just a few ideas for you to look into. Good luck.
-R
1. O-ring not sealing at the oil pump. Did you replace the pump and the o-ring at the pickup tube/pump interface? How is your oil pressure?
2. Air pockets in oiling system. Did you prime the oiling system? Did you soak the lifters? Without any idea on how long the new build has been run, have you let the engine warm up to operating temp?
3. Loose rockers or failed trunion bearings.
4. Pushrod length. Did you measure? This is a need to know.
5. Oversized pushrod diameter. I have heard (not experienced) that 11/32" dia & 3/8" diameter pushrods can make contact with the head casting if not clearanced.
Just a few ideas for you to look into. Good luck.
-R
2 i didn't remove the lifters when doing the build. No priming. Brought it up to temp once.... no difference.
3 all rockers were tight and work property
4 did not measure. Was told it's the right size. And it had the right preload I believe. At just under I full turn after zero lash
5 I did notice a couple of scratches on a couple of the pushrods but they are stock sized pushrods.....?
09-19-2018, 01:17 PM
#11
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You say you "rebuilt" the engine?? YET you did not touch the oil pump, nor remove the lifters. Rebuilding means FULL teardown and refurbishing/replacing all parts.
09-19-2018, 01:58 PM
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Yea I tore it down and rebuilt it. Didn't use new parts for EVERYTHING. OIL PUMP STAYED on when upgrade g to an MS3 cam. Pump is fine. Still was getting 50lbs at idle and above that driving.
09-19-2018, 02:00 PM
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[QUOTE=G Atsma;19971537]You say you "rebuilt" the engine?? YET you did not touch the oil pump, nor remove the lifters. Rebuilding means FULL teardown and refurbishing/replacing all parts.[/QUOT
if you have advise it would be handy but if you want to criticize then you can go somewhere else. Thanks
if you have advise it would be handy but if you want to criticize then you can go somewhere else. Thanks
09-19-2018, 03:25 PM
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09-20-2018, 11:36 AM
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09-20-2018, 12:33 PM
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09-20-2018, 12:47 PM
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