Build LS6 Noisy and High Lead/copper
#1
Build LS6 Noisy and High Lead/copper
I recently purchased a914 with a built LS6 engine - forged bottom end, balanced and blueprinted, trick flow 215 heads, Not sure how to calculate the cam it’s a Custom Comp .544/.534 lift 220/224 duration at .050. However it has 1.8 rockers so I’m not sure the proper way to calculate the true lift and duration.
1) Noisy engine – Sounds like lifters, but they have been looked at several times. It has had problems with pulled rocker studs. The most recent repair installed T&D 1.8 ratio shaft mount rocker kit, upgraded valve springs, pushrods, Viton valve seals
2) Oil analysis says high lead (162) and high copper (72)
I’m old school and new to the LS engine especially built aluminum block engines. It does have forged pistons and headers so I expect some of the noise to be coming from that. I haven’t had much driving time as the body is wrecked and in the process of being repaired. In the meantime I’m trying to find out why the engine is so noisy.
I did fabricate a head shield out that would block off the engine from the headers down and it made it considerably quieter.
I guess my real question are:
Are engines of this type noisy?
Does the oil analysis indicate a problem? Could it still be breaking in?
Thanks in advance.
Dan
1) Noisy engine – Sounds like lifters, but they have been looked at several times. It has had problems with pulled rocker studs. The most recent repair installed T&D 1.8 ratio shaft mount rocker kit, upgraded valve springs, pushrods, Viton valve seals
2) Oil analysis says high lead (162) and high copper (72)
I’m old school and new to the LS engine especially built aluminum block engines. It does have forged pistons and headers so I expect some of the noise to be coming from that. I haven’t had much driving time as the body is wrecked and in the process of being repaired. In the meantime I’m trying to find out why the engine is so noisy.
I did fabricate a head shield out that would block off the engine from the headers down and it made it considerably quieter.
I guess my real question are:
Are engines of this type noisy?
Does the oil analysis indicate a problem? Could it still be breaking in?
Thanks in advance.
Dan
#3
TECH Senior Member
I calculated your lifts with the 1.8 rockers at .576 intake, .565 exhaust. Good numbers!
#4
Oil pressure was good. Somewhere around 40. I'll look later to confirm.
#5
#6
TECH Senior Member
There is a slight increase in duration due to the higher rate of lift, but I have no way of calculating that.
#7
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I recently purchased a914 with a built LS6 engine - forged bottom end, balanced and blueprinted, trick flow 215 heads, Not sure how to calculate the cam it’s a Custom Comp .544/.534 lift 220/224 duration at .050. However it has 1.8 rockers so I’m not sure the proper way to calculate the true lift and duration.
1) Noisy engine – Sounds like lifters, but they have been looked at several times. It has had problems with pulled rocker studs. The most recent repair installed T&D 1.8 ratio shaft mount rocker kit, upgraded valve springs, pushrods, Viton valve seals
2) Oil analysis says high lead (162) and high copper (72)
I’m old school and new to the LS engine especially built aluminum block engines. It does have forged pistons and headers so I expect some of the noise to be coming from that. I haven’t had much driving time as the body is wrecked and in the process of being repaired. In the meantime I’m trying to find out why the engine is so noisy.
I did fabricate a head shield out that would block off the engine from the headers down and it made it considerably quieter.
I guess my real question are:
Are engines of this type noisy?
Does the oil analysis indicate a problem? Could it still be breaking in?
Thanks in advance.
Dan
1) Noisy engine – Sounds like lifters, but they have been looked at several times. It has had problems with pulled rocker studs. The most recent repair installed T&D 1.8 ratio shaft mount rocker kit, upgraded valve springs, pushrods, Viton valve seals
2) Oil analysis says high lead (162) and high copper (72)
I’m old school and new to the LS engine especially built aluminum block engines. It does have forged pistons and headers so I expect some of the noise to be coming from that. I haven’t had much driving time as the body is wrecked and in the process of being repaired. In the meantime I’m trying to find out why the engine is so noisy.
I did fabricate a head shield out that would block off the engine from the headers down and it made it considerably quieter.
I guess my real question are:
Are engines of this type noisy?
Does the oil analysis indicate a problem? Could it still be breaking in?
Thanks in advance.
Dan
Christian
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#9
It was initially assembled with the best parts. And the most recent work was done by J&M Corvette in NJ. I couldn't find a working number and it's been several years.
Last edited by dan10101; 10-13-2018 at 05:58 PM.
#11
#12
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LS engine’s make valve train noise. 1.8 ratio rockers on after market cam lobes will increase that noise. Forged piston will rattle as well. This could be loose bearing clearances when hot (Aluminum block mains open up considerably). My guess is a pinched or misaligned oil pump pickup tube O ring
#13
LS engine’s make valve train noise. 1.8 ratio rockers on after market cam lobes will increase that noise. Forged piston will rattle as well. This could be loose bearing clearances when hot (Aluminum block mains open up considerably). My guess is a pinched or misaligned oil pump pickup tube O ring
I'm at the point now that I will at least pull the pan and check the bearings. Look for abnormal wear, (I've hear bad things about the thrust bearing). The last guy who did the bearing job years ago, (but few miles) did pay close attention to the oil pickup tube and O ring when he reassembled it. The lead count is most concerning to me, but I'm still wondering if maybe it's leftover residual from previous bearing problem.
Last edited by dan10101; 10-14-2018 at 11:01 AM.
#14
TECH Senior Member
That's not Tony Mamo. He just made the quote at the bottom of A.R. Shale Targa's posts.
#16
I'm wondering if the High Lead was caused when the bearings were replaced. The engine has an oil cooler and I'm wondering if some of the lead particles were left over from the previous bearing problem whatever that might have been.
That job was done in car which leads me to suspect the clean up wasn't as good as it could have been.