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Discussion Starter · #1 ·
I rebuilt my engine about 1K miles ago. I'm showing 132 PSI in one cylinder and 135 PSI in the other cylinder. I am at 4500ft elevation, so according to some charts I found on the internet, it comes out to about 150 ish psi. I installed JE forged 9:1 compression pistons, so I Think its normal for the numbers to be low compared to stock, but i'm not sure how much. A leakdown test shows roughly 12% on both cylinders. Does it sound like my motor is in good standing? i'm having blue smoke on start up, and new valve seals didnt solve the issue, so i'm trying to check everything over.
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Discussion Starter · #4 ·
I removed carbon build up, and lapped them by hand with compound. Not sure where the leakdown is going. probably crankcase. I can hear it coming from the top end with the valve cover removed. I do have larger than stock ring gap for my turbo application, so I can imagine that my leakdown would be a little higher than others. the cylinder head has almost 6000 miles on it now, so i think the valve guides are worn. I just installed some old used valve seals I had from the rebuild on the exhaust valves. I'll see if the smoke stops for a bit until the heat destroys them. If the smoke stops, I'll know the oil is coming from the loose stem to guide clearances.
 
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