how to set timing after timing belt breaks

wdw · Aug 2nd, 2004, 04:58 PM

I know it's likely I have one or more bent valves, but I'm going to give replacing the timing belt a shot anyway. Problem is I don't know how to set the valve train and crank to be in sync again. I know I am suppose to find TDC on the compression stroke for cyl. 1, but I don't want to move the camshaft till valves for #1 are closed to allow compression for fear of bending more valves. Can I move #1 cyl. to TDC and the rotate the crank 90 degrees either way so no pistons are a TDC then move the camshaft till the rotor points at cyl 1 position? I have a Haynes book, but it's not really helpful on this. If someone has pics and/or a desciption of how to do this that would help a lot.

Thanks

Myetball · Aug 2nd, 2004, 10:49 PM

Best bet would be to remove the valve cover then unbolt the rocker shaft. This will release pressure from all the valves and you can rotate the crank freely. After you get the #1 piston to TDC you can rotate the cam until it's in the proper position. Then just retighten the rocker shaft. Sounds easy but it will take some close watching to make sure the cam doesn't rotate while you're bolting the rocker shaft back down.

When loosening/tightening the rocker shaft be careful to only turn the bolts a little at a time....like one turn each....in an even sequence like 1-3-5-4-2. This will help avoid a snapped shaft.

nispulsar · Aug 3rd, 2004, 07:36 PM

When you loosten the cam, you should loosten it slowly from the outside in going front back then move inward, and tightening, you should go from the center out.