a urgent question about crankshaft pulley

[stanleyeye]

When I installed the crankshaft pulley, I found its groove was not aligned with timing mark"0" of the No.1 timing belt cover.
How can I set it back to TDC? Just turn the crankshaft pulley 360 degree or 720 degree?

Thanks a lot for your help!

[88 LE]

Just turn the crank pulley clockwise till it lines up at 0.

What exactly are you trying to do? Install a timing belt?

[stanleyeye]

yes, I want to install a timing belt.
So, I just need to turn it 1 revolution or 2 revolutions?
Thank you for your help, 88 LE,

Originally Posted by 88 LE

Just turn the crank pulley clockwise till it lines up at 0.

What exactly are you trying to do? Install a timing belt?

[88 LE]

Originally Posted by stanleyeye

yes, I want to install a timing belt.
So, I just need to turn it 1 revolution or 2 revolutions?

It doesn't matter. TDC is TDC, doesn't matter if its TDC on compression or exhaust stroke. The engine will figure it out when you fire it up.

So just turn the crank pulley clockwise till the notch on it lines up with the "0" mark on lower timing belt cover.




After you get the belt installed you'll need to rotate the crank 2 full turns (720 degrees), to check the crank and cam alignment.

This is because the cams rotate at half the speed of the crank. 360 degrees of crank rotation = 180 degrees of cam rotation.

Since its a 4 stroke engine its take 720 degrees for a complete cycle (compression and exhaust). 720 degrees of crank rotation = 360 degrees of cam rotation.

[Toysrme]

What 88 LE said.

[stanleyeye]

got it, thank you so much!!!
admire,

Originally Posted by 88 LE

It doesn't matter. TDC is TDC, doesn't matter if its TDC on compression or exhaust stroke. The engine will figure it out when you fire it up.

So just turn the crank pulley clockwise till the notch on it lines up with the "0" mark on lower timing belt cover.




After you get the belt installed you'll need to rotate the crank 2 full turns (720 degrees), to check the crank and cam alignment.

This is because the cams rotate at half the speed of the crank. 360 degrees of crank rotation = 180 degrees of cam rotation.

Since its a 4 stroke engine its take 720 degrees for a complete cycle (compression and exhaust). 720 degrees of crank rotation = 360 degrees of cam rotation.