ls4 oil pump sucked the pan dry...
03-15-2009, 12:25 AM
#1
ls4 oil pump sucked the pan dry... I found what did my motor in. The vvt oil pump.
Found a spun bearing in the bad cylinder. Looks like I probably sucked the pan dry.
The extra slop in the rod cause it to come up more in the cylinder and hit the valve.
Total damage:
1 broken valve
3 bent valves
1 missing piston
1 piston broken off the rod
2 bent rods
2 cylinder sleeves with chunks missing
cracked block
camshaft scored on a few lobes
both heads need lots of work
windage tray bent
Crank scored up
Motor is done for.
This came out of the intake
Found a spun bearing in the bad cylinder. Looks like I probably sucked the pan dry.
The extra slop in the rod cause it to come up more in the cylinder and hit the valve.
Total damage:
1 broken valve
3 bent valves
1 missing piston
1 piston broken off the rod
2 bent rods
2 cylinder sleeves with chunks missing
cracked block
camshaft scored on a few lobes
both heads need lots of work
windage tray bent
Crank scored up
Motor is done for.
This came out of the intake
Last edited by dlove; 03-24-2009 at 12:06 AM.
03-15-2009, 12:47 AM
#2
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damn that has me thinking about the lifters i had put in my car, i dont remember the brand but the place i bought them sells oem parts, so going by that its probably stock ls1 lifters.........i have not had a problem with them. also i shift nowhere near 7k......that sucks though
03-15-2009, 09:56 AM
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03-15-2009, 10:13 AM
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Yep, it was the P/V contact that caused the collapsed lifter. dlove said his P/V clearance was a bit on the close side and obviously the valvetrain wasn't stable enough with that new cam at 7k+ We talked it over last night and came to that conclusion.....
03-15-2009, 10:38 AM
#12
I have to say, running Morel lifters could have helped with your valvetrain stability. The hydraulics they have are MUCH better than anything else you will find. You even make a notable more amount of power compared to regular GM lifters. Its possible that if you had Morels, this may not have happened.
The head will be repairable - thank god, but yea, you're looking at a new short, but hopefully most of your parts check out ok. Was this a LS3 motor?
03-15-2009, 01:53 PM
#16
I have to say, running Morel lifters could have helped with your valvetrain stability. The hydraulics they have are MUCH better than anything else you will find. You even make a notable more amount of power compared to regular GM lifters. Its possible that if you had Morels, this may not have happened.
The head will be repairable - thank god, but yea, you're looking at a new short, but hopefully most of your parts check out ok. Was this a LS3 motor?
For the cost of l92 heads, I will just pick up a new set.
03-15-2009, 02:01 PM
#17
FormerVendor
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different lifters would not have changed the end result-it was not a lifter problem.More than likely the springs were not controlling the valves.The l92 heads have a big *** intake valve,i don't think the a set of patriot springs will correctly control that big valve at 7000rpms.You need to invest in some much better valve springs and other valve train components to take those heads past 7000rpm
03-15-2009, 02:18 PM
#18
If it means anything it is the patriot extremes, the better ones of them. They have about 1k miles on them. The valves are the ls3 valves. I also agree there is probably a chain of events that happened. I do think the lifters had a roll.
Would you suggest the 8019's? I thought they are close to the same specs of the extremes.
Would you suggest the 8019's? I thought they are close to the same specs of the extremes.