335XPT Won't hold vaccuum

[Gentleman]

We have a 1997 335XPT that a customer brought in.
The saw holds pressure well but won't hold vacuum for a second.

Will new bearings and seals fix it?

 

[Dub11]

@67L36Driver didn't you rebuild one of these?

 

[cus_deluxe]

I would think thats a dead ringer for crank seals. Im not familiar with these to know if the seal is integral to the bearing or seperate? Clamshell engine right?

 

[Gentleman]

I would think thats a dead ringer for crank seals. Im not familiar with these to know if the seal is integral to the bearing or seperate? Clamshell engine right?

Yes Clam shell. The bearing wraps the seal.

 

[Onan18]

Yes Clam shell. The bearing wraps the seal.

Passes pressure test but fails vacuum test means a bad lip one one of the crank seals. I would say new bearings and seals are in order, also if it has that stupid auto decomp plug it.

 

[Mastermind]

Passes pressure test but fails vacuum test means a bad lip one one of the crank seals. I would say new bearings and seals are in order, also if it has that stupid auto decomp plug it.

Best Answer !!!!