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Cool Down Pulley for 535i? (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by Dave in Dallas on July 29, 2000 at 22:35:27:

I have an 88 535is and I have a question for my E34 brethern. Specifically, I'm trying to find out what size the water pump pulley would be on an E34 (M30 engine). Mine is 131 mm in diamter. I think the E34 pulley is smaller (91 mm?) and drives the water pump a little faster, which means it moves more water and hence cools the M30 engine a bit better. I'm trying to determine if I can install the E34 pulley on my E28 and cool it a bit more. Also, if this works does anyone have an idea as to the size belt I would need?

Thanks a lot!

Dave in Dallas

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