Help Spec an O-Ring

[JamesWilson]

Hi guys,
Could anyone tell me the size of this o ring please, its from where the drivers side drive shaft meets the output shaft of the gearbox

Many Thanks

 

[barnesautos]

Measure the shaft diameter with a set of vernier callipers and take 2mm off what you got - boom there you have it .
Besides o rings stretch anyway . So get a smaller one . It's only to stop water getting in - don't work for s**t anyway . Lube it up with copper grease when fitting it back

 

[Laimface]

^^^ A silicone based grease would be a better option, copper grease will most likely chemically attack the O-ring and cause it to fail. It'll be best to check the diameter of the O-ring wire thickness too. Once you have your measurements you can find out what ISO number it is by going to page 11 on this guide: https://www.jameswalker.biz/docs/jwco/o_rings_full_doc.pdf