guuben
Seaman Apprentice
- Joined
- Jun 30, 2015
- Messages
- 35
.Yesterday, in curiosity wanted to check, before dissasamblying the manifold bolts for 3.0 Barr mercruiser with 27 ft lbs and result was one broken manifold pinbolt....the closest to riser. %@?#&*%#.
I am very confused: The service manual gives the same torque for all 5 bolts (25 ft lbs) but two of them are pinbolts with fine thread for the nut outside manifold and inside block goes 3 peices 3/8 UNC standard bolts.
Of course they will be much more load on the pinbolt if you use same torque amount on a fine thread than a "standard" thread.
Tried to get out the broken one from block...without succes...Now there is a drilled 7,5 mm 1 inch deep hole in the block and I am not shure how to continue the best way. Suggestions please.
I blaim the manual for the broken bolt and in my world its really stupid to mix fine thread and normal thread on the same item...or, do I been lost in the djungel? To have 2 pinbolts is smart but rest is not.
I am very confused: The service manual gives the same torque for all 5 bolts (25 ft lbs) but two of them are pinbolts with fine thread for the nut outside manifold and inside block goes 3 peices 3/8 UNC standard bolts.
Of course they will be much more load on the pinbolt if you use same torque amount on a fine thread than a "standard" thread.
Tried to get out the broken one from block...without succes...Now there is a drilled 7,5 mm 1 inch deep hole in the block and I am not shure how to continue the best way. Suggestions please.
I blaim the manual for the broken bolt and in my world its really stupid to mix fine thread and normal thread on the same item...or, do I been lost in the djungel? To have 2 pinbolts is smart but rest is not.