The headbolts in the rear head keep breaking in my cummins 400 big cam. What causes this? Does anyone know why or have the same problem?
headbolts keep breaking in a cumminms 400 big cam
Discussion in 'Peterbilt Forum' started by black smoke, Dec 30, 2011.
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
What yr model is the engine got to be old
-
It's an 85
-
Could be an 86...
-
The head bolts get corroded and pitted from moisture intrusion. This weakens them and they pop from the high torque value put on them when installed.
-
Get used to it. I used to breakbone every few months. Expensive buggers too.
One thing that may help. The big cam is not a modern engine. It likes to run higher rpm. They humm right along at 2300rpm. If you run it low rpm like a modern engine it breaks even more head bolts.
They are fun engines for a toy, miserable engines for working every day -
-
Big Cam 400's were not meant to be jaking at high RPM's.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.