Does anyone have a compression tester adapter for a Cummins B series???

I need one, and Snap-On has them backordered (had one on order for over a month). Would anyone let me borrow one for a few days so I can check compression, and see where all my blowby is coming from??

Thanks in advance,
Chris

 

In Frame time?

 

In Frame Hell...The only good way to rebuild an engine is to tear it out, tear it down, and start over.

If it needs bored, it's not going back in! At least that's my opinion, but you know what those are like
Chris

 

Yeah i know what you mean, Been there done that, but you can check your bore, (somewhat). But yes you are correct, the only correct way is to pull it out.
Buy another and have a spare,LOL

 

If blowby location is what you're after, a low pressure air line connected to each cylinder (probably have to remove the injectors for access) at TDC should give you a good indication.

Listen at the tailpipe or loosen the turbo and check at the flange for an exhaust valve leak, through the intake for an intake valve leak, at the oil fill cap for a ring leak.
Or use a Leak Down Tester to check the individual cylinders.

 

Sounds like a good plan Shovelhead, but how do I keep the air from leaking back around the injector holes??? Anyone know what thread size the big nut on the injectors are? I could make something like that If I knew the thread.

Thanks again,
Chris

 

I have a snap on one you could use but i'm up hear on the west coast of canada!

 

I did it again posting without my glasses and hit new thread insted of reply look at adapterin new post.

 

FWIW

Cummins does not do compression test's to check engines, they test the blow by with a monometer (sp?)

they have a chart that tells the condition from new to fubar


I have seen major blowby from lined up rings but mostly from ether

 

Thats true but it should be done on the dyno to get a good reading. You can do a compression test as well to check the condition of the motor.