Mike here again,
finally doing a bit more on the tractor conversion.
I have started to pull down the Class combine engine and found that it is not too bad for wear, however as it came without the sump attatched and the oil pump removed I am having to check everything.
I would not chance to old linner O rings however as the linners were sealed with silastic ( silicone sealer ) there was no chance I would leave the linners in because this sealer is effected by oil and predictably had started to break down, and having had to rebuild one Fordson engine because of silastic in the big end oil gallery, I don;'t want this to happen to this engine.
The liners came out really easily because of the deteriated silastic, in fact these are the easiest linners that I have pulled out.
The block is dated L 28 F and the Super Major tractor it is going into has A 27 F block and the head that was on the 6cyl engine was dated 18 5 H however I have a 28 5 K FL marked head that I will be using as it is supposed to be a better design head, though on a quick look I cannot spot the difference yet.
See the sitastic on the bottom of the liner that protruded into the crankcase area.
The crankshaft looks to be in reasonable shape but I have yet to measure it.
This a exhaust elbow found with the engine parts on the farm tip it seems to be the original Combine exhaust elbow
but it faces firward so I will probably make myself one out of steel that faces at right angles to the head.
See the pile of silastic that will need to be removed
This model block has the "O" rings at the top and bottom of the liners.
The port design is supposed to be better in this later head, but haven't seen it yet?
Valves cleaned up alright, just have to measure them now, exhaust guides are worn as usual.
Pistons look usable, though now the liners have been removed I will likely fit new liners & rings at least.
The big eng bearings show signs of scuffing in the middle, I can't be sure if it was from water in the oil or not, given the amount of silastic everywhere I wouldn't have thouight that this was possible.
I spoke to an old guy the other week who recons that the cast Iron on the Ford engines was quite porus and unreliable, I hadn't heard that one before?
The other possibility for bearing damage would be from the injector bleed off return lines, I have rebuilt an engine that failed because of the banjo copper washers being left out and diesel diluting the oil, this 6 cyl engine did not have any copper washers on these banjo connections.
The engine contained alot of carbon which could indicate that injectors were not functing properly, there is also the possibility that the crankcase ventililation was set up wrong and excessive amounts of crankcase vapors were being burn't.
one rocker cover has a breather mounted in the middle and the other has none, neither engine has a breather in the timing gear cover, but they had breathers in the lifter side cover, haven't worked out what this was connected to yet.
MIke
