I have a question for anyone......I have read the engine build manual since I am in the process of changing my timing chains and tensioners to the metal type.....before I take the old chains off, I want to be sure that my engine is in the correct timed position. As It stands now, I have the cam locking bars installed and the timing disc pin in the correct hole and flush to the tranny housing and tight. My question is:
Can you have the engine on the wrong stroke with it in this position....or is this the only timing position and it is designed to be on the correct stroke (compression) and at the correct ATDC degree.
I know that the "A" bank most forward cylinder is close to TDC and the lobes of the intake and exhaust cams for that cyl are pointing somewhat horizontally, which I assume would be compression stroke.
I did not see anything in the manual about compression or exhaust stroke....so I'm curious. Plus the last thing I need to do is make a mistake at this junction.
I think I may have originally put this in a different thread, so I am reposting (sorry)
Thanks for all your knowledge.
Dave

 

Hi Dave,
If you have the cam flats aligned, the cams locked down and the locking pin in, then you're good to go.

You are correct:- remember, the cams rotate at half the engine speed, so you'd have to rotate the crank two revolutions for the flats to align again and the each piston will then be on the same part of its cycle as previously.

Hope that makes sense!

 

That makes total sense!! Thank you Michaelh and GGG. I am familiar with the old distributor cap, points, and timing marks. This is the first time with a nice vehicle with a timing disc.....love this forum.
Well this week will be dismantling, and starting the reassembly to get my XKR on the road again.

thanks ever so much.
Dave