Recent 787 pick up, engine stuck

[mason08]

So i picked up a 97 gtx with the 787. The motor only turns maybe a 1/8th back and forth. I pulled the RAVE valves and i can see the pistons moving. What else could be holding it up allowing only a little movement?

 

[GGuillot]

So i picked up a 97 gtx with the 787. The motor only turns maybe a 1/8th back and forth. I pulled the RAVE valves and i can see the pistons moving. What else could be holding it up allowing only a little movement?

Possibly a locked jet pump. Pull the jet pump assembly off and try again. I have a 96' GSX where this happen, previous owner thought the engine was locked, but it was the jet pump locked and rusted up. My 97' GTX was locked also when I got it, but it was really bad, piston with a hole in it, metal pieces jamming the crank, full of water and rust. Total mess.

Let's hope it's just the jet pump.

 

[mikidymac]

If the pump is fine it’s typically a rotary valve or rotary gear bad. Moving on could be a bad balancer too.

 

[mason08]

i pulled the cover for the rotary valve and that was it. Had rust stuck on it not allowing movement.

 

[etemplet]

That Miki !!!!! I was thinking maybe some rust in the cylinders. Hope the rest of the engine is Okie Dokie.