Sr camshaft snapped after rebuild - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

troskinatior · 07-27-2012, 10:16 PM

So I had a guy rebuild my sr20 so i wouldnt have to deal with any problems but it just made one big one. I had a friend put the motor in and he said it was miss firing as soon as he started it up and it was running for about 30 seconds then cut out and wouldnt turn over after that. Turns out the cam snapped and i dont know if it was a bad cam or the guy that built my motor did a shotty job. And also im leaving for army basic traning in 2 days so i kinda need to know what you guys think asap because i dont want to be stuck with rebuilding the engine over again.

Cliffs: rebuilt motor, cam snapped right after start up, how could that happen?

troskinatior · 07-29-2012, 09:22 AM

No one? I dont want to be stuck rebuilding the engine over again

codyace · 07-29-2012, 08:09 PM

Just put another cam in it, and follow the FSM procedure. Snapped cam installes are 99% caused by improper FSM procedure, and not having the crank at TDC

Good Luck at Basic training man!

godsmack · 07-30-2012, 06:08 PM

Yea that was installer error. hopefully that's all that got f'ed up in the process.

*fliprayzin240sx* · 07-30-2012, 11:08 PM

Did you put the cams in? If not, bring it back to the who ever put the engine back together. They probably owe you some new valves too.

Arireese · 07-31-2012, 12:01 AM

Quote:

Originally Posted by fliprayzin240sx

Did you put the cams in? If not, bring it back to the who ever put the engine back together. They probably owe you some new valves too.

This is what i said. I did the swap for him. So of course if feel like shit, car was mis firing, but didnt find any problems exeternally. So I figure timing wasnt set correctly.

07-27-2012, 10:16 PM	#1
troskinatior Leaky Injector Join Date: Sep 2009 Location: Colorado Age: 34 Posts: 135 Trader Rating: (2) Feedback Score: 2 reviews	Sr camshaft snapped after rebuild So I had a guy rebuild my sr20 so i wouldnt have to deal with any problems but it just made one big one. I had a friend put the motor in and he said it was miss firing as soon as he started it up and it was running for about 30 seconds then cut out and wouldnt turn over after that. Turns out the cam snapped and i dont know if it was a bad cam or the guy that built my motor did a shotty job. And also im leaving for army basic traning in 2 days so i kinda need to know what you guys think asap because i dont want to be stuck with rebuilding the engine over again. Cliffs: rebuilt motor, cam snapped right after start up, how could that happen?

07-29-2012, 08:09 PM	#3
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	Just put another cam in it, and follow the FSM procedure. Snapped cam installes are 99% caused by improper FSM procedure, and not having the crank at TDC Good Luck at Basic training man! __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

07-30-2012, 11:08 PM	#5
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Did you put the cams in? If not, bring it back to the who ever put the engine back together. They probably owe you some new valves too. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

07-29-2012, 09:22 AM	#2
troskinatior Leaky Injector Join Date: Sep 2009 Location: Colorado Age: 34 Posts: 135 Trader Rating: (2) Feedback Score: 2 reviews	No one? I dont want to be stuck rebuilding the engine over again

07-30-2012, 06:08 PM	#4
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 39 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	Yea that was installer error. hopefully that's all that got f'ed up in the process.