No compression in on of the piston - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jworks · 02-24-2011, 01:34 PM

Hey zilvians, need some assistance. I got a friend with a KA24E, says piston #4 has 0 compression after doing a compression check. The motor can turn on but its only firing on 3 cylinders and smoke is coming from the area around piston #4. Can anyone give me a general idea of what is possibly going wrong? Thanks in advance!

eklips3 · 02-24-2011, 05:39 PM

no compression means dead cylinder.

time for new motor

jacobs13 · 02-24-2011, 05:44 PM

its the ring

psychos13 · 02-24-2011, 06:19 PM

Do leakdown test and it's most likely a fried ring

jvgos13 · 02-25-2011, 12:04 AM

u could try to do a wet compression test by squirting a couple of drops of oil in the cylinder and test for compression again, if it holds then it confirms that its the piston ring,(DONT put more than 3 squirts). smoke is the oil burning.

02-24-2011, 01:34 PM	#1
jworks Zilvia Member Join Date: Sep 2007 Location: Los Angeles, CA Age: 37 Posts: 163 Trader Rating: (0) Feedback Score: 0 reviews	No compression in on of the piston Hey zilvians, need some assistance. I got a friend with a KA24E, says piston #4 has 0 compression after doing a compression check. The motor can turn on but its only firing on 3 cylinders and smoke is coming from the area around piston #4. Can anyone give me a general idea of what is possibly going wrong? Thanks in advance!

02-24-2011, 05:39 PM	#2
eklips3 Zilvia Addict Join Date: Apr 2008 Location: Calgary Canada Age: 34 Posts: 626 Trader Rating: (3) Feedback Score: 3 reviews	no compression means dead cylinder. time for new motor __________________ 1992 240sx (RB20. 362whp@16psi)

02-24-2011, 05:44 PM	#3
jacobs13 Zilvia FREAK! Join Date: May 2009 Location: Long Beach Age: 32 Posts: 1,061 Trader Rating: (27) Feedback Score: 27 reviews	its the ring

02-24-2011, 06:19 PM	#4
psychos13 Zilvia FREAK! Join Date: Dec 2010 Location: Long Beach, Ca Age: 32 Posts: 1,184 Trader Rating: (13) Feedback Score: 13 reviews	Do leakdown test and it's most likely a fried ring

02-25-2011, 12:04 AM	#5
jvgos13 Join Date: Feb 2011 Location: 562 Posts: 9 Trader Rating: (0) Feedback Score: 0 reviews	u could try to do a wet compression test by squirting a couple of drops of oil in the cylinder and test for compression again, if it holds then it confirms that its the piston ring,(DONT put more than 3 squirts). smoke is the oil burning.