looking for some knowledge...

[Mazdaboyracer]

Currently working on a 1G 4G63 n/t, not mine but, working on it for a friend of mine.
He jumped the timing belt on it at low RPMs, let's say 800-1500RPMs. It died and he tried cranking it a few times.
I tore it down and by the time I got to the timing belt I knew we had some big problems. The balance shaft belt snapped in two places, I could tel the belt was OLD due to cracks and rot. I'm assuming this caused the timing belt to jump. It was missing teeth for about five inches in one spot and had a couple other areas where a few teeth were partially chewed up. The timing belt looks pretty new.
I know that we have some bent valves and will need to rebuild the head. My BIG question is what damage will a snapped balance shaft belt do? Is there going to be problems on the bottom end?

 

[dsm-onster]

No problems on the bottem end as long as the valves didn't kiss the piston crowns too harshly. You will see that when you pull the head.

 

[BLINKY619]

^ yea like he said

 

[Mazdaboyracer]

Ok that's what I figured. I'm not too worried about the pistons, because of the low rpm situation. I have heard about a balance shaft removal kit... good or bad?

 

[Xo4TSi]

Very good idea to do, almost all the vendors here sell them

 

[Mazdaboyracer]

They don't sound all that involved to install either. So it would be $50 worth spending?