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Gudgeon pins and bearings, replace or not?


Cushing

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Engine stripped and the pistons are all OK and no play in the gudgeon pins/small end bearings, the question is : should I replace them or not ? They say that the small-end bearing should be reamed to suit gudgeon pin, this sounds complicated and I don’t have the equipment to do this, is this true ?

 

Steve

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hi steve, don't worry , be happy, if the pin is soaked in oil , and you could not feel play it is ok

new it must move under a low thumb pressure see part of my movie on youtube

when renew the bearing it must be honing or cutting to the right size,

not reaming , only with special equipment.

sietse // holland

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I replaced my bronze bushing, when I installed new pistons with their matching new gudgeon pins.

 

The bronze inserts come new with a slit, they are pressed into place and reamed to fit the gudgeon pin as you said.  I had a local engine machine shop do the bronze insert and ream them to fit.

 

New bronze bushings

IMG_1096.jpg

 

Old bronze bushing and old gudgeon pin

P5072071.JPG

 

Bronze bushing after 74k miles

P5072072.JPG

P5072073.JPG

P5072074.JPG

Travis

Vulcan Grey 89SE

 

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Thanks guys, I think I’m just gonna be happy and re-install them, they don’t look worn and there is no play against the pin. A machine shop here will charge me $160 per hour so this sort of job will make me cry. Thanks again for your input.

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