Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - Timing problems Ka24de...Loosing my mind after 3 days of disappointing results

CASilForty · 08-07-2013, 12:40 PM

.....since the entire length of the chain is not used and slack is taken up by tensioners in the engines design, spacing the timing marks out at even distance on the chain would not work because of the additional slack chain traveling through the sprockets. This is the only way the marks would become synchronized to the chain links. Those links are there simply as a "setup" guide for aligning the valve system to the crank stroke. And, as I've already said, what matters at the end of every cycle isn't the position of the chain, but the accurate location of marks on each sprocket @ TDC, THEY SHOULD ALL RETURN TO TDC POSITION REGARDLESS OF THE CHAIN'S POSITION! ONCE THE CRANK TURNS FROM TDC, Lining up the chain means nothing, what matters is that at the end of ea. cycle, all components connected to the timing system have returned to the ORIGINAL LOCATION YOU ALIGNED THEM TO WHEN YOU INSTALLED THE CHAIN,...... @ #1TDC!!! Provided you didn't hit anything turning the motor to prove this to yourself, you should be on the way to realizing what you need to focus on and quit stressing on your chain as long as your positive you lined all the marks up and the chain links too. Quit moving the crank to prove to yourself you did it right and you wont be so confused!! lol

W/ALL MARKS ALIGNED THOSE CHAIN LINKS ARE NO LONGER RELEVANT AS A REFERENCE POINT, unless ya wanna turn the motor indefinitely to see how many cycles it takes to align them again, but it wont tell you anything you need to know.

But to finish the install correctly, now ya have to realign the whole thing again, chain and all to be sure you drop the dizzy in correctly. This of course does not apply to ppl with a math genius and the ability to count teeth on the fly, or to tune up techs with lotsa experience.

08-07-2013, 12:40 PM	#15
CASilForty Zilvia Member Join Date: Sep 2009 Location: Reno, NV Posts: 200 Trader Rating: (9)	.....since the entire length of the chain is not used and slack is taken up by tensioners in the engines design, spacing the timing marks out at even distance on the chain would not work because of the additional slack chain traveling through the sprockets. This is the only way the marks would become synchronized to the chain links. Those links are there simply as a "setup" guide for aligning the valve system to the crank stroke. And, as I've already said, what matters at the end of every cycle isn't the position of the chain, but the accurate location of marks on each sprocket @ TDC, THEY SHOULD ALL RETURN TO TDC POSITION REGARDLESS OF THE CHAIN'S POSITION! ONCE THE CRANK TURNS FROM TDC, Lining up the chain means nothing, what matters is that at the end of ea. cycle, all components connected to the timing system have returned to the ORIGINAL LOCATION YOU ALIGNED THEM TO WHEN YOU INSTALLED THE CHAIN,...... @ #1TDC!!! Provided you didn't hit anything turning the motor to prove this to yourself, you should be on the way to realizing what you need to focus on and quit stressing on your chain as long as your positive you lined all the marks up and the chain links too. Quit moving the crank to prove to yourself you did it right and you wont be so confused!! lol W/ALL MARKS ALIGNED THOSE CHAIN LINKS ARE NO LONGER RELEVANT AS A REFERENCE POINT, unless ya wanna turn the motor indefinitely to see how many cycles it takes to align them again, but it wont tell you anything you need to know. But to finish the install correctly, now ya have to realign the whole thing again, chain and all to be sure you drop the dizzy in correctly. This of course does not apply to ppl with a math genius and the ability to count teeth on the fly, or to tune up techs with lotsa experience.