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Mart · 08-24-2022, 01:08 PM

What problems are associated with excessive crank end float?

I have a crank that is in nice condition but when assembled up it has .020" end float. The motor starts up ok, I haven't driven it yet.

What, if any problems can I expect from this situation.

It is a French motor so has 59A type cam gears which thrust the cam towards the block and subsequently there is a forward thrust on the crank. This is the same direction as clutch release thrust.

So in this case would it be reasonable to think that the crank might tend to spend most of it's time at the forward limit of travel and not switch back and forth? Or do you think it would drift towards the rear location during acceleration?

I don't really have much choice as I want to run it at the weekend but I was wondering if excessive end float is more of a less than optimum thing or is it definitely a complete disaster.

Mart.

08-24-2022, 01:08 PM	#1
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,776	Excessive crank end float. What problems are associated with excessive crank end float? I have a crank that is in nice condition but when assembled up it has .020" end float. The motor starts up ok, I haven't driven it yet. What, if any problems can I expect from this situation. It is a French motor so has 59A type cam gears which thrust the cam towards the block and subsequently there is a forward thrust on the crank. This is the same direction as clutch release thrust. So in this case would it be reasonable to think that the crank might tend to spend most of it's time at the forward limit of travel and not switch back and forth? Or do you think it would drift towards the rear location during acceleration? I don't really have much choice as I want to run it at the weekend but I was wondering if excessive end float is more of a less than optimum thing or is it definitely a complete disaster. Mart.