Truck Repair: torque specification, connecting rod bearing, torque specification


Question
What is the right Torque Specification of the cylinder head bolt,main bearing,connecting rod bearing,rocker arm and jake brake bolts in Ft.Lbs?of the M11-350E Engine?

Answer
Cyl head is 160 ft lbs plus 90 degrees.Rod bolts are 155 ft lbs.Rocker shafts are 135 ft lbs for steel & 90 ft lbs for aluminum.Jake bolts are 60 ft lbs.Mains have changed to a torque plus angle too.
I had to look up the main bearing torque.It depends on the engine serial # after 35011095 it is 70 ftlbs then 100 ft lbs then 180 degrees.Prior to eng # 35011095 it is 70 lbs then 120 degrees.Check the bolts for part number 3328742.If they are part # 3027493 THEN REPLACE THEM & torque to new spec.The number should be on the head of the bolt.If not,the bolt has a raised part above the threads & the new bolt has more threads up the bolt.