Bad cam ls3. Why
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10-29-2017, 01:31 AM
#9
three things i can think of right off the bat:
poor valvetrain control because of old/weak springs
lubrication issues
bad cam core (i think comp had a run of these a while back)
poor valvetrain control because of old/weak springs
lubrication issues
bad cam core (i think comp had a run of these a while back)
10-29-2017, 12:29 PM
#13
FormerVendor
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CMC Cores Hi 68, there are two good Core manufactures in the USA, I/Crower use Camshaft Machine Company for cam cores.
The core number 416137 is NOT in the CMC book.
I too believe you have a "soft" core, just do the Rockwell.
The Rockwell Data could allow you recourse in court.
I can "model" you complete Valve Train in EAP if you provide that date.
VERY SAD to make a product, saving a FEW dollars, that costs YOU an engine.
Lance
The core number 416137 is NOT in the CMC book.
I too believe you have a "soft" core, just do the Rockwell.
The Rockwell Data could allow you recourse in court.
I can "model" you complete Valve Train in EAP if you provide that date.
VERY SAD to make a product, saving a FEW dollars, that costs YOU an engine.
Lance
10-29-2017, 02:39 PM
#15
ModSquad
iTrader: (6)
Are the cylinders scarred up? Have you looked at the bearings?
10-30-2017, 11:43 AM
#17
Look at the bearings and crank My buddy's cam and lifters looked jsut like that...
We pulled the engine. The main bearings and main journals has scratches due to the metal getting into the oil. The rod bearings and the journals looked fine but we replaced those bearings too. We determined his problem was due to oil starvation after a trackday on Silverstone with a HV oil pump - but a soft core from Comp could have contributed based on the time period he bought the cam. He noticed the enigne was making a new, although not loud, noise on the drive home - the drive was only about 30 min and he slowed way down after he noticed the noise - but the damage was done. While we had it appart we added an improved racing oil pan baffle that helps keep the oil near the pickup in long turns like Copse, he was driving through at about 95mph...
We pulled the engine. The main bearings and main journals has scratches due to the metal getting into the oil. The rod bearings and the journals looked fine but we replaced those bearings too. We determined his problem was due to oil starvation after a trackday on Silverstone with a HV oil pump - but a soft core from Comp could have contributed based on the time period he bought the cam. He noticed the enigne was making a new, although not loud, noise on the drive home - the drive was only about 30 min and he slowed way down after he noticed the noise - but the damage was done. While we had it appart we added an improved racing oil pan baffle that helps keep the oil near the pickup in long turns like Copse, he was driving through at about 95mph...
10-30-2017, 02:50 PM
#18
TECH Senior Member
10-30-2017, 03:02 PM
#19
The cam is oiled first then down to mains. Thats likely why.
Also the stock barbell allows ALOT of larger particles by as well as the stock in pan bypass and filter bypass. Thats why youd plug them with the Saccity kit we have and use the better barbell to decrease foreign particle size/bypass anyway.
Also the stock barbell allows ALOT of larger particles by as well as the stock in pan bypass and filter bypass. Thats why youd plug them with the Saccity kit we have and use the better barbell to decrease foreign particle size/bypass anyway.
10-30-2017, 03:30 PM
#20
TECH Senior Member
Ah! Perfectly logical! Straight from cam journals to the mains.... OUCH!