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Post mortem help?

  • Thread starter Thread starter Macmatic
  • Start date Start date
M

Macmatic

Guest
"Its worse than that, its dead Jim."

I don't know much about these motorcicle engines but looking at this I'm thinking it must have been oil starved on 1 & 2? The exhaust cam lobes were pretty bad on 1 & @ also.

Any thoughts on what likely caused this engine to 5#!7 the bed? No saving this one but maybe I ( and others) can learn something.

Notice how dark the liners for 1 & 2 are in the cylinders.

badhead4.jpg
 
Pic doesn't load for me.

I will look over whatever pics you have if they will come up for me...


Mark
 
What is that banjo fitting in the picture for? It may be the problem.

Steve
 
srivett2 said:
What is that banjo fitting in the picture for? It may be the problem.

Steve
Click to expand...

Mark, here is the direct URL for the pic
http://i17.photobucket.com/albums/b67/Macmatic/badhead4.jpg

Steve, Banjo fiting? The one I can see at the lower left is one of the twothat feed oil to the cams, you can see the other hose going off to the right. The inset pic is of the top of #1 piston, you can kinda see how its gone down to the rings in the valve releave. The damage is on the intake side. The valves themselves look pretty good.

/\/\ac
 
'k. Nothing definitive so far but I can tell you that whoever had the clutch cover off last thought RTV would make a good gasket. No paper at all, just RTV, with plenty slopped inside the case.

Later this evening I'm going to finish stripping it down of parts to save and I pretty much expect to find a chunk of RTV blocking up one of the oil paths headed to the left side of the engine.

More around 10pm EST.

/\/\ac
 
Macmatic said:
'k. Nothing definitive so far but I can tell you that whoever had the clutch cover off last thought RTV would make a good gasket. No paper at all, just RTV, with plenty slopped inside the case.

Later this evening I'm going to finish stripping it down of parts to save and I pretty much expect to find a chunk of RTV blocking up one of the oil paths headed to the left side of the engine.

More around 10pm EST.

/\/\ac
Click to expand...

Could be it.

So, the pistons are Toast, but how are the Cylinder walls? Is there some reason that you are convinced that it is fried? Cylinders can be honed, you'd be surprised at how well they come out. Actually, I'm not certain of the dimensions, but on most Car engines you can bore over about .010". I do know there are 850 kits available for our engines. If the valves and the head look ok, I wouldn't give up yet.
 
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