Mechanical timing - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

osal · 07-27-2010, 02:55 PM

I was checking if my cam timing was correct and after many revolutions i got the markings on the cam sprockets and chain to align at TDC as seen below.

However i noticed that the lower timing chain marks do not align with the yellow marking as seen below.

I would have thought that since the timing on the upper chain is correct, the timing on the lower chain would be too. Is this true? or are they not related?
I did my search but could not really find the answer to this.

Thanks

osal · 07-27-2010, 09:09 PM

anybody?...
my car has been really slow yet it idles fine.

importdude · 07-27-2010, 09:19 PM

lower mark will not line up for X(not too sure) amount of times

osal · 07-28-2010, 08:03 AM

oh so if i just keep turning the engine, eventually both the upper and lower chains together will line up with their corresponding markings?

JDS Performance · 07-28-2010, 08:14 AM

I am not sure how many revolutions it will take to align them back up - but I do know its alot and not worth the trouble.

If you engine is out of time - it either
- will not start
- idle like crap
- bend the crap out of your valves

07-27-2010, 02:55 PM	#1
osal Leaky Injector Join Date: Dec 2007 Location: Rockville Age: 36 Posts: 132 Trader Rating: (3) Feedback Score: 3 reviews	Mechanical timing I was checking if my cam timing was correct and after many revolutions i got the markings on the cam sprockets and chain to align at TDC as seen below. However i noticed that the lower timing chain marks do not align with the yellow marking as seen below. I would have thought that since the timing on the upper chain is correct, the timing on the lower chain would be too. Is this true? or are they not related? I did my search but could not really find the answer to this. Thanks

07-27-2010, 09:19 PM	#3
importdude Zilvia FREAK! Join Date: Nov 2006 Location: san j0 Posts: 1,391 Trader Rating: (19) Feedback Score: 19 reviews	lower mark will not line up for X(not too sure) amount of times __________________ built ka-t

07-28-2010, 08:14 AM	#5
JDS Performance Zilvia.net Advertiser Join Date: Jul 2006 Location: Concord, NC Posts: 3,127 Trader Rating: (53) Feedback Score: 53 reviews	I am not sure how many revolutions it will take to align them back up - but I do know its alot and not worth the trouble. If you engine is out of time - it either - will not start - idle like crap - bend the crap out of your valves __________________ http://www.240SXTECHDVDS.org http://www.JDSPerformanceTurbos.com

07-27-2010, 09:09 PM	#2
osal Leaky Injector Join Date: Dec 2007 Location: Rockville Age: 36 Posts: 132 Trader Rating: (3) Feedback Score: 3 reviews	anybody?... my car has been really slow yet it idles fine.

07-28-2010, 08:03 AM	#4
osal Leaky Injector Join Date: Dec 2007 Location: Rockville Age: 36 Posts: 132 Trader Rating: (3) Feedback Score: 3 reviews	oh so if i just keep turning the engine, eventually both the upper and lower chains together will line up with their corresponding markings?