Sorry to hear about your troubles. Were you still running OE lifters when the cam was upgraded?
Still had the OE lifters. I took the easy way and left the heads on when I did the cam swap. I was actually planning to change out the valve springs this winter as I'd been putting it off and figured it was probably overdue.Sorry to hear about your troubles. Were you still running OE lifters when the cam was upgraded?
Mobil 1 (kidding!!!) Always Redline 5W40 as recommended by Matt. Always changed well before needed.What oil were you running?
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Ah, I didn't think about a bent valve, just assumed something with the valve seats and possibly piston rings were responsible for the compression. All the metal goodness in the oil probably a cam lobe and/or lifter, hopefully not bearing dust.I think you have a bent valve.
If it was a lifter failure, you would have compression.
I'll pull the heads eventually so I can take a look at that cylinder and journal. In my dream land I was just looking at a cleanup and new cam/lifter swap but I don't have high hopes, not with the low compression in one cylinder and low oil pressure. If it needs any work I'll just get a forged short block. If I'm pulling the motor, what's going back in is going to be better than what it came with from the factory.When my LS3 crunched a lifter, the cam was completely fucked, so there's that. The lifter bore was able to be salvaged, but there were some scores in the cylinder wall that sent me into slight overbore territory to get cleaned up.
Otherwise, was just a "rebuild" with nothing extra or special.
I'd pull the motor if you're willing/capable, and then find a machine shop from there.
As you should! My failure wasn't as bad as yours...thankfully but I made her better.If I'm pulling the motor, what's going back in is going to be better than what it came with from the factory.