Did compression test on first rebuild
Did a stock rebuild of a B18B1. The only thing reused in this motor were the rods, crank, valves and valvetrain . Shoulda built the damn thing!!! The standard spec calls for 199psi, with a max variance of 28psi. Also minimum compression should be 135psi. Let me know what you guys think, I already put about 12k miles.
#1 = 195psi
#2 = 183psi
#3 = 187psi
#4 = 195psi
#1 = 195psi
#2 = 183psi
#3 = 187psi
#4 = 195psi
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thatbluecrx »</TD></TR><TR><TD CLASS="quote">#2 is pushing it... mind enlightening me on what is/could be causing that</TD></TR></TABLE>
Well I havent done a leak down so Im not all sure. Things to take into consideration is the machine shop kinda sucked. I noticed that the piston to wall clearance was not equal with all the bores. Why? They suck. I dont remember the exact specs because I had that done last summer. One other thing is that although I initially lined up the piston rings to spec, the ring compressor had a tendency to rotate the rings a bit while tightening. So maybe it f--d something up. I know not to use that type ever again. Also the head (crv) basically was just resurfaced (maybe machine shop fucked that up with the block?) and all new gaskets. The cams (crv cams) and everything else in the valvetrain were reused. Maybe a not so good valve guide or seal; maybe a rounded valve? One last thing (and sorry for the book) the engine was not all the way up to operating temperature; not cold either. I just idled for about maybe 2 minutes after about a 2 hour rest from driving so it wasnt all the way hot like it should have been. But its not like 3 rings would expand and 1 wouldnt no what I mean.
Well I havent done a leak down so Im not all sure. Things to take into consideration is the machine shop kinda sucked. I noticed that the piston to wall clearance was not equal with all the bores. Why? They suck. I dont remember the exact specs because I had that done last summer. One other thing is that although I initially lined up the piston rings to spec, the ring compressor had a tendency to rotate the rings a bit while tightening. So maybe it f--d something up. I know not to use that type ever again. Also the head (crv) basically was just resurfaced (maybe machine shop fucked that up with the block?) and all new gaskets. The cams (crv cams) and everything else in the valvetrain were reused. Maybe a not so good valve guide or seal; maybe a rounded valve? One last thing (and sorry for the book) the engine was not all the way up to operating temperature; not cold either. I just idled for about maybe 2 minutes after about a 2 hour rest from driving so it wasnt all the way hot like it should have been. But its not like 3 rings would expand and 1 wouldnt no what I mean.
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