Turbo came in wrong fitting on housing

olebusman · October 19, 2018, 03:19:50 PM

on a 43 deg. tilt, lefty gm 4106 the square cut o ring, about the size of a quarter or so. the detroit part no for that is 5104978. might be the same. Check with a dd dealer

eagle19952 · October 20, 2018, 10:00:50 AM

CAT yellow o-rings take/withstand more heat. By design.

luvrbus · October 20, 2018, 10:18:32 AM

Quote from: eagle19952 on October 20, 2018, 10:00:50 AM
CAT yellow o-rings take/withstand more heat. By design.

yea but CA says the Butadiene in Cat o=rings can cause cancer and birth defects

what doesn't cause cancer according to CA,I read that on my Cat o-ring kit and shook my head WTH

chessie4905 · October 20, 2018, 11:42:15 AM

Don't forget to prelube turbo bearing, so it doesn't start dry. Leave idle for a few minutes assure lube getting to it before speeding up.

bevans6 · October 20, 2018, 11:48:50 AM

My turbo doesn't have an O-ring that I ever saw, on the oil dump outlet. Mine just has a 1"OD pipe screwed into the NPT threaded hole. Maybe I need to upgrade?

luvrbus · October 20, 2018, 12:25:31 PM

Quote from: bevans6 on October 20, 2018, 11:48:50 AM
My turbo doesn't have an O-ring that I ever saw, on the oil dump outlet. Mine just has a 1"OD pipe screwed into the NPT threaded hole. Maybe I need to upgrade?

You are ok his turbo dumps back through the air horn and the blower,he needs o-rings to seal return

Scott & Heather · October 21, 2018, 12:15:32 PM

Alrighty she's back together and purring nicely. Will get my Detroit Software link up and running and see what my boost numbers are. As of right now seat of the pants is amazing power no more smoke at all, and this appears to have fixed my overheating problem. Crazy. I would have never guessed that a bad turbo would cause me to constantly run hot.

buswarrior · October 21, 2018, 01:29:00 PM

Detroits do NOT like airway obstruction, intake or exhaust.

Overheat, one of the first things to investigate after coolant supply.

A bad turbo can obstruct both.

Happy coaching!
Buswarrior

Scott & Heather · October 22, 2018, 09:25:45 AM

I'll do some more testing to determine whether my overheat issue is fixed by this but it's appearing so

peterbylt · November 08, 2018, 11:26:16 AM

Scott,

I am curious, did the rebuilt Turbo give you an increase in power?

Is there a noticeable difference when driving?

Better pulling power on hills?

Increased or decreased MPG?

Peter