Decision NEEDED for 92 high milage ka24de after compression test - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

lazymbf · 05-29-2008, 12:41 AM

My 92 240sx has 197xxx miles on it, I just did a compression test on it, before that I notice cylinder 2 and 3 spart plug soaked with engine oil, #3 is the worst. These are the number I got #1 is 165 to 170psi, #2 and 3 I got 170psi to 175psi (I assume this is wet compression number), and #4 is 165 to 170psi. I am thinking if it is worth to replace the head gasket or just save up to rebuild the engine or get another engine. My goal is stock engine with low boost in the future. Thank you for the advice guys.

tt99ol · 05-29-2008, 12:43 AM

those compression numbers are good
you need a valve cover gasket
and sparkplug wells gasket

bmx22 · 05-29-2008, 01:12 AM

yes spark plug well gasket.i thought my plugs where bad went to change it and one well was filled with oil.... change well and cover gasket

aNskY · 05-29-2008, 12:44 PM

if the sparkplugs are oiled on top, yes, you need valve cover gasket.

if oil has made it's way into the combustion chamber you need HG. i dont know if those compression numbers are possible with a busted hg though, maybe if its slightly blown between an oil port?

lazymbf · 05-29-2008, 12:57 PM

How about If I get the fel-pro head set, consider the milage and I assume these never replace. so I can replace both HG and VG and other seals. Is the Fel-pro brand good? Thank you guys

Flybert · 05-29-2008, 01:42 PM

Those comp numbers are fine.

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05-29-2008, 12:41 AM	#1
lazymbf Join Date: Jun 2005 Location: MD Age: 41 Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	Decision NEEDED for 92 high milage ka24de after compression test My 92 240sx has 197xxx miles on it, I just did a compression test on it, before that I notice cylinder 2 and 3 spart plug soaked with engine oil, #3 is the worst. These are the number I got #1 is 165 to 170psi, #2 and 3 I got 170psi to 175psi (I assume this is wet compression number), and #4 is 165 to 170psi. I am thinking if it is worth to replace the head gasket or just save up to rebuild the engine or get another engine. My goal is stock engine with low boost in the future. Thank you for the advice guys.

05-29-2008, 12:43 AM	#2
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 34 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	those compression numbers are good you need a valve cover gasket and sparkplug wells gasket __________________ Need automotive work done in the antelope valley? Ask me how i can help.

05-29-2008, 01:12 AM	#3
bmx22 Leaky Injector Join Date: Feb 2005 Location: hawaii, Posts: 108 Trader Rating: (0) Feedback Score: 0 reviews	yes spark plug well gasket.i thought my plugs where bad went to change it and one well was filled with oil.... change well and cover gasket

05-29-2008, 12:44 PM	#4
aNskY Nissanaholic! Join Date: Apr 2005 Location: NY Age: 37 Posts: 1,604 Trader Rating: (10) Feedback Score: 10 reviews	if the sparkplugs are oiled on top, yes, you need valve cover gasket. if oil has made it's way into the combustion chamber you need HG. i dont know if those compression numbers are possible with a busted hg though, maybe if its slightly blown between an oil port?

05-29-2008, 12:57 PM	#5
lazymbf Join Date: Jun 2005 Location: MD Age: 41 Posts: 19 Trader Rating: (0) Feedback Score: 0 reviews	How about If I get the fel-pro head set, consider the milage and I assume these never replace. so I can replace both HG and VG and other seals. Is the Fel-pro brand good? Thank you guys

05-29-2008, 01:42 PM	#6
Flybert Post Whore! Join Date: Mar 2003 Location: none Posts: 3,862 Trader Rating: (7) Feedback Score: 7 reviews	Those comp numbers are fine.