Do any of you know of a resource that describes the actual differences between internal parts for the various iterations of the M113 V8? I have the bore and stroke dimensions for the 4.3, 5.0, 5.4, and 5.4K engines, along with enough part numbers to have a good idea of which parts are different between engine displacements, but finding specs on those parts is a headache.
Bore: 89.9mm (E43), 97mm (E50, E55, E55K)
Stroke: 84.1mm (E43 and E50), 92mm (E55, E55K)
Some differences I’m trying to sort out:
The dimensions of the E50 and NA E55 pistons, connecting rods, and bearing inserts. The bore is the same between them, and a longer stroke doesn’t necessarily mean that different rods and pistons are required, just a different crankshaft. However, the pistons, rings, rods, and bearing inserts are all different part numbers between the two.
The specifications of the E43/E50 and NA E55 valve springs. The AMGs used a different, and much more expensive, valve spring.
Camshaft specs, especially for the E50 snd E55 engines. What the difference is in the rocker arms between the E43/E50 and E55 engines.
Flow rates of the various different injectors.
I’m sure there are some more things that I’m not thinking of right now. If there is a resource available with this data that I simply haven’t managed to locate, please let me know where to find it.
Bore: 89.9mm (E43), 97mm (E50, E55, E55K)
Stroke: 84.1mm (E43 and E50), 92mm (E55, E55K)
Some differences I’m trying to sort out:
The dimensions of the E50 and NA E55 pistons, connecting rods, and bearing inserts. The bore is the same between them, and a longer stroke doesn’t necessarily mean that different rods and pistons are required, just a different crankshaft. However, the pistons, rings, rods, and bearing inserts are all different part numbers between the two.
The specifications of the E43/E50 and NA E55 valve springs. The AMGs used a different, and much more expensive, valve spring.
Camshaft specs, especially for the E50 snd E55 engines. What the difference is in the rocker arms between the E43/E50 and E55 engines.
Flow rates of the various different injectors.
I’m sure there are some more things that I’m not thinking of right now. If there is a resource available with this data that I simply haven’t managed to locate, please let me know where to find it.
