Truck Repair: valve adjustment, torque wrench, valve adjustment
QuestionI have a 1971 4200 Transtar and I would like to know the gauge measurement for the gap intake and exaust valves? This engine I think is a 290 cummins with three heads 6 cylinder
Answer Depending on which injectors you have...
For PT Inj(Spring protrudes past inj boby):You adjust valves & inj on same cyl.The mark A is 1-6,B is 2-5, & C is 3-4.Valves are Int 0.016 & Exhaust is 0.029.The injector you hand torque to 55-60 IN LBS.Adjust the Injector first,then the valves.
On Top Stop injs...
Mark Valve Inj
C 1 5
A 5 3
B 3 6
C 6 2
A 2 4
B 4 1
Lash Int 0.011 Ex 0.023 Inj 5-6 inlbs (special "T" torque wrench)