my compression results - what to do? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Warwick5s · 06-06-2003, 01:44 PM

due to my KA24E burning oil lately i decided to do a compression check.

every cylinder went up to 50 or so on the first crank, then eventually to 153-155 psi. after adding a little bit of oil to the cylinder the initial crank was around 90 but still went to about 155-158 psi.

my engine has about 103k on it, and like i said before burns oil when i give it a lot of gas (but not when i start it up, only at WOT and high rpms). i don't think that compression is so low as to indicated failing rings (especially seeing as how it's within 4 psi across the board.) but the fact that the initial stroke was so low makes me wonder. leaking valve seals would cause more oil burning at startup than high RPMs. headgasket is possible. what else could be causing the smokescreen?

06-06-2003, 01:44 PM	#1
Warwick5s Zilvia Junkie Join Date: Sep 2002 Location: Madison, WI Age: 43 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	my compression results - what to do? due to my KA24E burning oil lately i decided to do a compression check. every cylinder went up to 50 or so on the first crank, then eventually to 153-155 psi. after adding a little bit of oil to the cylinder the initial crank was around 90 but still went to about 155-158 psi. my engine has about 103k on it, and like i said before burns oil when i give it a lot of gas (but not when i start it up, only at WOT and high rpms). i don't think that compression is so low as to indicated failing rings (especially seeing as how it's within 4 psi across the board.) but the fact that the initial stroke was so low makes me wonder. leaking valve seals would cause more oil burning at startup than high RPMs. headgasket is possible. what else could be causing the smokescreen?