HELP!!!! :( Ka / sr20 engine builder question????? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

72nismo · 07-07-2014, 10:51 AM

So I had an SR built with forged pistons. After installing motor tried to start it up but it wouldn't turn on.I did a compression test and these are the numbers I got?
1 cyl - 90
2 cyl - 0
3 cyl - 0
4 cyl - 30
I checked it with 2 different gauges and got the same numbers??

Any one can tell me why I'm getting 0 compression on 2 different cylinders??
I set to top dead center and timing and everything ok.
HELP????

Thanks

72nismo · 07-07-2014, 12:39 PM

Any engine builders on here ??????

cotbu · 07-07-2014, 12:45 PM

"That's why we get the big bucks!"
Ring orientation, Head gasket, cracked block, bent valves, cracked head, mechanical timing.

Diehardsr20 · 07-07-2014, 12:51 PM

1 ring orientation has to be right

72nismo · 07-07-2014, 03:13 PM

Great Fellas!!!
I'll have that dbl checked...

Ka-t in progress · 07-07-2014, 04:08 PM

Pressurize the cylinders and check to see if the valves are closed. Ran into an issue rebuilding mine where the lifters wasn't allowing my intake valves to seat fully,causing no compression at all.

72nismo · 07-08-2014, 05:27 PM

Quote:

Originally Posted by Ka-t in progress

Pressurize the cylinders and check to see if the valves are closed. Ran into an issue rebuilding mine where the lifters wasn't allowing my intake valves to seat fully,causing no compression at all.

LIFTERS were the issue!
Thanks!!!!

07-07-2014, 10:51 AM	#1
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	HELP!!!! :( Ka / sr20 engine builder question????? So I had an SR built with forged pistons. After installing motor tried to start it up but it wouldn't turn on.I did a compression test and these are the numbers I got? 1 cyl - 90 2 cyl - 0 3 cyl - 0 4 cyl - 30 I checked it with 2 different gauges and got the same numbers?? Any one can tell me why I'm getting 0 compression on 2 different cylinders?? I set to top dead center and timing and everything ok. HELP???? Thanks Last edited by 72nismo; 07-07-2014 at 12:39 PM..

07-07-2014, 12:39 PM	#2
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	Help Any engine builders on here ??????

07-07-2014, 12:45 PM	#3
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	"That's why we get the big bucks!" Ring orientation, Head gasket, cracked block, bent valves, cracked head, mechanical timing. __________________ LoverTechnologies "Half Broken Things!"

07-07-2014, 03:13 PM	#5
72nismo Zilvia Junkie Join Date: Oct 2006 Location: So Cal Posts: 490 Trader Rating: (7) Feedback Score: 7 reviews	Help Great Fellas!!! I'll have that dbl checked...

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

07-07-2014, 12:51 PM	#4
Diehardsr20 Join Date: Jun 2013 Location: Dexter, NM Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	1 ring orientation has to be right

07-07-2014, 04:08 PM	#6
Ka-t in progress Leaky Injector Join Date: Oct 2012 Location: Middle tennessee Age: 32 Posts: 89 Trader Rating: (0) Feedback Score: 0 reviews	Pressurize the cylinders and check to see if the valves are closed. Ran into an issue rebuilding mine where the lifters wasn't allowing my intake valves to seat fully,causing no compression at all.