New head, low oil psi, 50% jake

[Rawze]

did they replace the rod / main bearings when they were doing the job?

idle sounds to me a bit low oil pressure.


A bit low on oil pressure will not make the jake weaker unless the oil pressure is dropping into dangerously low levels while driving it / head is being starved of oil badly. What is the oil pressure when going down the roads?

What is the boost pressure doing during high engine braking?. For all you know, you might have an exhaust manifold gasket or turbo mounting gasket leak due to improper gasket instillation, improper torque of components, warping when re-installing everything, or something else.

Pressurize the entire engine to about 30 psi between the intake of the turbo and the outlet of the doser pipe. See if there are any intake, egr, or exhaust leaks.


Was it a certified reman?-- If so, You need to verify if it... ref: http://rawze.com/forums/showthread.php?t...6#pid14106