Hello,

I just bought an 87 K5 Blazer with a swapped 400 in it. I bought it as a project truck, it runs but needs work.

So my first question is...

The crankshaft pulley, I think thats the name of it, correct me if I'm wrong, the pulley all the way at the bottom of the motor. Its wobbling pretty severely. Could this be a broken bolt, or a bad bearing? How do I check it and how do I resolve this problem?

Any help is greatly appreciated. Like I said, its a project truck, I don't mind taking the truck completely apart. Now I am not a "expert mechanic", but with enough instruction I can do anything.

Thanks in advance!!

 

Does it just LOOK like its wobbiling around? The 400s are externally ballanced so it'll have like a big chunk taken out of and when it runs it looks like its about to come flying off. But if its not shaking or anything that's normal

 

Ill have to definitely check that. It looks like it wiggling but its not shaking the engine.