Below are some photos of a early Big Cam IV Cummins I've had for some time, basically ended up with it for free. Finally decided to tear it down and find out what was wrong with it. It's a weird pile of pieces, should have been a BC III style block with standard liners-No it's a NT88 block with lower press fit liners and 3/4" main bolts. Pistons were Cummins TriTech 3 ring 15.3:1 compression with standard .250 deep valve reliefs-Should have had 4 ring 14.1 compression with .340 deep valve reliefs. This engine is a Early 400 BCIV CPL 676 which used a high lift cam {on exhaust lobe only} which also used the early .140 valve protrusion cylinder head which requires a piston that has .340 valve reliefs. In few later versions Cummins used a flush valve to head deck and used a piston with .250 reliefs. When I removed the pan I found part of a push tube {follower end}. Which caused caution. The main bearings were in excellent shape but rod bearings {top shell} not so good. Rod bushings worked over. Removed upper end and heads. It was a boxing match. Who ever assembled this mess was drunk. Note where exhaust valves beat into piston valve reliefs-things really got tight when the jake was flipped on. If anyone on here has any plans on rebuilding any older Cummins engines especially anything after 1984 look it over from top to bottom and make sure all parts match CPL.
That piston is soooooooo pretty! Reminds me of an aluminum flower.
A mashed aluminum flower.
Staring at it is bringing out my feminine side
A women with plumbers crack!
Sounds like that's is a Cummins Model BITSA. You know Bits of this and Bits of that! At least it didn't have any parts from a Detroit in it or did it?
If it had, it would still be running.
If I found any parts with green paint other than the jakes-work would have stopped.
Uh huh you bet.
Well they do call them Cumm-a-part don't they?
No I believe there called Cummins-but if it's going down that road-The arrows in the Detroit logo stand for {**** that goes around comes around}.
Sounds like a mess Makes me think about the guys when you go to look at a truck tell you they just rebuilt the engine so its good to go lol
Yup. And the Mack bulldog on the hood is so one ******* can look at another.
I guess if you feel that way, it's ok.
I fit the mold.
The block checks out mid range on crank housing bore specs the crank checks out good also. The deck is in good condition, the heads were not that old so it's replace all valves. New pistons/liners, crank and cam bearings, reconditioned con rods, rebuilt accessory drive and compressor, rebuilt pump and injectors, rebuild the jakes, new water pump and damper and make it full flow cooling. It will sell.