Hey guys,
I am looking for some input before I go and rip the head off my car. I was driving down the road in second gear when I hit the throttle. At about 6000 rpm the engine died and I pulled over. The engine cranked but sounded like it had no compression. I towed it home and went to turn the motor over by hand and noticed the crank pulley bolt had backed all the way out with the woodruff key. I pulled the timing case and lined everything back up again and timed it thinking I got away with one this time.

After I put it together the car still has no compression and obviously does not start. I did a compression test and I have 0-0-0-0. Do you think I bent all my valves? Is a 9:1 compression ratio engine still going to make contact with the valves? I looked down in the cylinders and they look fine from the spark plug holes, the plugs look perfect and the turbo turbine wheel is pristine. I am asking for ideas before I take off my turbo kit again to take the head off. Thanks!

Neema

 

Sounds like you could have bent up valves and all the pressure is moving past them. Man I hope the valves didn't put holes in the pistons. I'm sorry to hear this. I can't really think of any other tests that you couls do to tell.

 

yes, even with low compression you will still bend valves if the timing jumps.

you bent all the valves.

 

The crank pulley doesn't affect timing. It only runs accessories. On my 9:1 motor, the pistons did not come up out of the block on a full stroke.

 

Get a bore scope and look into the cylinders. Any marks on top of the pistons will show and then you know its bent valves.

The crank pulley bolt coming off and the key coming with it sounds like the lower timing gear spun and left the valves wide open and smacked. Even with a low compression motor it is possible.