Cummins B Series 6 cyl 5.9L

 

These are the measurements of different parts for the engine as we took it apart.

 

Gears

Injection Pump drive gear backlash – 0

Camshaft gear backlash – 0

Lube Pump gear backlash – 0.020”  (over by 0.007”)

Lube Pump Idler gear – 0.004”

 

Lube Pump

Oil Pump tip clearance – 0.003”

Port Plate clearance – 0.001”

Body Bore clearance – 0.008”

 

Cylinder Head

#5 Rocker Lever bore diameter – Exhaust - 0.748”(round)

                                                      Intake side – 0.748”(round)    

#5 Pedestal shaft diameter – exhaust side – 0.7460”(round)

                                              Intake side – 0.7460”(round)

#5 Valve depth – Exhaust – 0.044”

                            Intake – 0.050”

#5 Vale Springs free Length – Exhaust – 2.163”

                                                 Intake – 2.360”

#5 Springs compression test – Exhaust – 1.875”

                                                 Intake – 2.000”

Cylinder Head Deck flatness – 0.004”(over by 0.001”, all along the head deck, but at the two ends)

 

Exhaust Manifold

Exhaust Manifold flatness – around #3,4,5 port holes it was over by 0.001”

 

Engine Block

Overall Flatness – around the hole of the water jacket hole between #4 and 5, it was 0.001” over

#2 Cylinder bore diameter- Top -4.0190”(round)

                                             Bottom – 4.0170”(round)

                                             Taper – 0.002”

 

#2 Piston

Piston skirt – 4.010”

Pin bore diameter – 1.5750”(min)

Piston Pin diameter – 1.5749”(round)

 

#2 Connecting Rod

Pin bore diameter with busing installed – 1.577”(min) (round)

Rod Bearing Clearance with bearing installed – 2.719”

 

Crankshaft

#2 Journal diameter – Front side – 2.717”

                                   Flywheel side – 2.718”

 

#5 Injector

Injector opening pressure – 3800 psi

Leakage Test – No drops - (hold at 290 psi blow opening pressure for 10 seconds)

 

Notes:

·         Everything was within spec, but a couple of things. (witch are noted)

·         Water pump was rusty, but no pitting. It turns good. Looking throw the weeping hole, no evidence that the seal has been leaking.

·         Water / coolent ways were a little rusty

·         Exhaust Manifold has no gaskets

·         Two bolts missing from oil pan and two holes are stripped

·         Tappets tops are durting

·         A lot of paint chips inside, everywhere.