Bent Valve

[ptrautne]

Is there any way to tell if you have a bent valve with out pulling the head? I was working on replacing the timing chain on the 92 pickup that I bought and I found that the crank was 90* farther along then the cam and I am not sure if it would have bent some valves.

[Eric_N]

You could do a leakdown test

[toyotanuts]

You could do a leakdown test
Yes a compression tester would be the best way. Just sucks you have to put the new belt on first.

[Eric_N]

I just tore down my 91, dont you have to pull the head to do the timing chain? I have a compression tester if you need one, but im sure someone closer to you may have one too.

[ptrautne]

I just tore down my 91, dont you have to pull the head to do the timing chain? I have a compression tester if you need one, but im sure someone closer to you may have one too.

I am going to pull the oil pan. I have a compression tester and tried testing before I started taking stuff apart and I was getting very low pressure which would be the case if the valves are not closed in the right position. I will put the chain on in the right position and re-run the compression test

[Eric_N]

Yea. I tore everything down b/c im doing a full rebuild, i just wasnt sure if you had to pull the head or not.

[ptrautne]

Well I have multiple bent valves and a hole in one or more pistons.

[Eric_N]

That sucks. Youve got a new head on that motor too right? I hope your head isnt messed up also.

[ptrautne]

That sucks. Youve got a new head on that motor too right? I hope your head isnt messed up also.

The previous owner had the motor rebuilt ~30K miles ago. I have a rebuilt engine ready to go in but I was hoping that all I need to do was change the timing chain in the current engine.

[Eric_N]

oh, im guessing the rebuiilt engine is the one on the pics in teds post then. Thats cool, kinds sux that you cant save the other engine though, its always nice to have spare parts