89wrangler

Ive got a 1989 cherokee with a 4.0 in it, the timing chain let go in it. I tried turning it over and just the crank turned, so i have the timing out of whack. I got in fo on shop key on where the timing marks should be. My problem now is with the valve cover off, with the cam and the crank lined up the number one valves are not closed. I know from other motors ive had apart that number one valves should be closed at tdc, is this motor a little different and if so where should the valves be at tdc. thanks in advance to anyone that has ever delt with this before.

funkyrat

You could be 180 degrees out... did you timing gears look like that when you put the chain on?

89wrangler

Yes I have that drawing also. Its just when I line up the cam and crank..th valves are not closed. Maybe that's how this motor lines up I don't know.not too sure with computer timing like this

funkyrat

Valves on 1 should be closed on tdc. Maybe a bent pushrod...

Mine had a spun bearing but still ran, but I had to replace a few pushrods when I redid the motor cuz they were bent.

freegdr

with timing gerar marks like this you not tdc compression stroke bring the motor around to tdc compression stroke rotor should point to no 1

freegdr

you did not remove the dist correct, timing chain marks correct your good to go . ignition timing and timing chain marks are two different monsters

89wrangler

Thank everyone for the input, I will check my pushrods and let you know thanks again

funkyrat

To be sure, check compression. If you have low compression on any of the cylinders (under 160) that's a good sign of trouble, whether it be bent pushrods, broken / bent valve, crank / cam timing out of whack, etc.