Lynx II, hull # 4225

[chris vickery]

Longer crank?
Maybe have to have the pulley shaft shortened.

[Lynn Eades]

Does the pulley have a part number?
I'd at least go to the parts book and find out if this is the correct pulley.
The Lynx was probably not the only crank driven fan.
Maybe one of the other Lynx owners has the answer?

[super dave]

The pulleys part number of C 29SR-6312 matches the parts book which Peter sent me. I asked him to send me the measurement of his generator on how far the pulley stands out which seems to line up with the water pumps.

Chris, I already thought of shorting the pulley but the seal surface would not be correct ant then the crank shaft would be sticking out past the pulley so that would not work.

The weird thing is that they all lined up on the engine that came out of Peters lynx and he sent me the water pumps and the lower crank hub pulley from it and I got him to measure the crank snout from the cam gear and it measures the same as the engine I built him

Here is a picture that Pete sent me of his engine.

[David Dunlop]

Is there anything different going on with the front face of the two blocks?

David

[chris vickery]

Maybe David is on to something. Was a different block used or the original one?
Maybe you will need to make spacer shims for the water pumps

[David Dunlop]

Looking back at earlier photos of Dave's engine rebuild, there seems to be a small casting that bolts to the face of the block, bottom dead centre at the front. The pulley assembly then fits over the shaft protruding through this small casting.

Is that casting original to the Lynx engine? If it is, everything should fit. If it is not the original casting, perhaps it is longer and causing the problem. The engine Dave is working on has a constant plane across the face of it, no recesses or protrusions for the water pumps, so if all the right pieces are attached to it, they should all line up. So now I am thinking a rogue part might be the problem.

David

[Lynn Eades]

Dave, there appears to be two key ways in the Lynx pulley? One is notched deeper than the other? Did you have it fitted with the deep notch to the timing gear key? The only thing there is the timing gear which probably lined up fine with the cam gear, otherwise you'd have noticed. So, does the Lynx gear have a rebate in it to allow the longer notched end of the pulley to go further in?
Unless there is a difference in the crank, which I doubt, then it has to be right there. You dont have any spacers other than the slinger?(which fits over the key)
You might have to remove the timing cover to compare old and new?
Good luck!