Changed out O-rings on oil filter housing weeks ago, and it is leaking again. I thought I got the right size, but obviously didn't. I'm sure they're metric, but does anyone know which size they are exactly?

PEACE THE DOG

 

20mm dia.

 

Thank you hailers, appreciate the quick response. Thickness, 1.5 2.0 2.5 ?

 

The counterbore is 1.70mm deep. I rekon you'd want to use something thicker than 1.70mm.

 

The Mazda part is N370-14-668A for my '90 NA. I can't find the invoice but I recall an obsurd price of about 1.25 each if memory serves.

 

Thanks again for the help. The guy at the parts place didn't see the point in printing up an invoice, using the printer, using his fingers, stop watch football, etc. so the price was-----you guessed it. Spent more in gas getting them than what they are worth. Unreal, but faulty o-rings killed our astronauts, so I consider it cheap.

PEACE THE DOG