Timing belt busted on b18b at 20mph.

Given that the values are not bent (I can hope). I expect that when I open it up the Cams and crankshaft will not be aligned, so I will be moving the shafts to TDC independently of each other to get them into alignment. Is there a recommend sequence on this so I am not doing any damage trying to get them to TDC?

i.e. Prior to moving the CAM and Crankshafts independently -
1.) Is it necessary to loosen all the value adjusters first to give more valve piston clearance?
2.) Should I be moving both CAMs at the same time?
3.) Specific sequence to follow? Crank to TDC then cams?

Thanks

 

i see your problem


WTF ARE VALUE adjusters?

 

I don't know if this is the actual way, but it seems to me that the safest thing would be to actually remove the cams so all valves are closed, rotate the crank so #1 is at TDC, set the cams in as close as possible to proper allignment, retorque the cam holders (or whatever they're called).

 

The easiest way to fix the camshaft issue is to find a long (8-10 inches) stick like object(straight of a wire coat hanger) works good. Take out the spark plugs, place the stick in the #1 spark plug hole. Once the stick touches the top of the piston, rotate the crankshaft and watch for the stick to travel down into the motor. Once it bottoms out, mark the stick, then turn the crankshaft till the stick comes all the way up, mark it. Now there is a point where all the pistons will be at the same position in all the cylinders ( half way point in all there travel, regardless of up and down stroke of pistons), just for reference 1 and 4 pistons will travel together and 2 and 3 will travel together. When you find the half way point of the pistons, set up your camshafts and then you can feel(depending on how badly bent the valves are) by turning them. I hope this is clear enough

 

Just turn everything slowly. If a valve touches a piston, you'll know it.

It would be best to do a leakdown test before doing anything else, though, as it will save some work if you do have any bent valves. Leakdown test does not require the timing belt to be installed, or the engine cranked over. Compression test does, so that's why I recommend a leakdown test first, if you have compressed air and can get the test equipment.

 

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