1984 120G grader

[Toxin]

If it pushes the cap off the motor is wore out

Its only got 15k hours all original as far as i know.tranny probly about shot as well.

 

[Razorsedge2003]

Maybe it sucks air into fuel system? I think that’s what mine is currently doing.

 

[Toxin]

Its possible but i thinking the rings are shot and its not building enough pressure to fire injectors.

 

[Toxin]

Does anybody know if a 3304 is rebiuldable.a guy told me they were a throw away engine basically.they said they arent sleeved so couldnt rebuild or not worth rebuilding.anybody ever heard that before?

 

[OzDozer]

The 3304 is fully rebuildable, and a good little engine. It has replaceable liners and plenty of parts are still available for them.
The guy who advised you wrongly was getting confused with the 3204 engine, which has a parent block (no liners). But even the 3204 is quite rebuildable.

 

[Nige]

Does anybody know if a 3304 is rebiuldable.a guy told me they were a throw away engine basically.they said they arent sleeved so couldnt rebuild or not worth rebuilding.anybody ever heard that before?

See @OzDozer reply above. The engine is rebuildable ad infinitum, but you will need a Parts Manual first in order to be able to correctly identify the parts that you need. This will apply whether you buy from a dealer or aftermarket.

The applicable Parts Manual is Cat Publication reference SEBP1711 (for machines S/N 87V8360-Up) and you can download one from HERE.
You might find a used paper one like this one on Ebay which is a steal @ $25 + shipping.

 

[56wrench]

Basically, a 3304 is a shorter (less 2 cylinders) than a 3306