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How much crank shaft end play 520

220/520 conversion? A true 520 would have about 20, 50 max.
If it is a gpu conversion, the thrust washers are gone at 1000"
 
Predator Solutions said:
It’s a pe-90/520 conversion. What do you mean by “gone at 1000?” How much play should a GPU conversion have?
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He means the thrust washer is 1" thick, i.e. gone at 1000 mils, hard steel on not so hard steel.

Watcha got now? Can you move it a little or a lot? The PE engines were not made to push prop, so the thrust bearing is not made to push prop so they do wear out thrust bearings and need TLC. They will also run completely worn out.
 
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Slidin Gator said:
He means the thrust washer is 1" thick, i.e. gone at 1000 mils, hard steel on not so hard steel.

Watcha got now? Can you move it a little or a lot? The PE engines were not made to push prop, so the thrust bearing is not made to push prop so they do wear out thrust bearings and need TLC. They will also run completely worn out.
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Right now it’s at about 30/1000 of an inch. Run it?
 
Ok, I misread your original post, what you were saying was .030" the 30/1000 threw me off, so to answer your question, .030" is a bit much, but take into consideration what slidin said, these engines were not designed for propulsion use, but,,, the thrust flange on the crankshaft could've been ground a bit when machined as they do wear, "not a nitride hardened crankshaft" the thrust plates usually hang pretty tough unless the locating rivet shears, if it had sheared, it would split the plate, and you would have about .150" of end play and a bunch of noise, so at this point I'd say run it.
 
John Fenner said:
Ok, I misread your original post, what you were saying was .030" the 30/1000 threw me off, so to answer your question, .030" is a bit much, but take into consideration what slidin said, these engines were not designed for propulsion use, but,,, the thrust flange on the crankshaft could've been ground a bit when machined as they do wear, "not a nitride hardened crankshaft" the thrust plates usually hang pretty tough unless the locating rivet shears, if it had sheared, it would split the plate, and you would have about .150" of end play and a bunch of noise, so at this point I'd say run it.
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Sounds good thank you. Just to clarify I don’t have any oil in the case yet. I was told that adding oil should also tighten it up a hair as well
 
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