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M3 water pump and oil restrictor


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Just looking for information on whether I should consider either or both of:

- an M3 water pump - I have an M3 crank and will be using the M3 pulley - do I need an M3 water pump? Do they fit (looks the same)? Does it perform better (turbo M10)?

- the M3 oil restrictor in the top of the block before it goes into the head - I have seen vague references to putting this into an M10. I won't be that high revving (6500rpm or below), but my old engine leaked around the valve cover presumably in part because it got so full of oil up there.


Does this just press into the M10 block? Will it affect the oil pressure reading I get from the top of the head by the distributor? Will there be enough oil in the head generally? The turbo (with its own restrictor) is getting its oil feed from the oil filter housing so that won't be an issue.

Thanks in advance


2002tii race car

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The 2002 water pump's plenty good- save your pennies.

If you're using the car on the street, I wouldn't worry about the

restrictor- it's only high- speed running that fills the head

consistently. Especially when you're on track, with long, sweeping corners.

If you are going to track it, then yeah, I'd do it....


"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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Well, further update is that I'm probably NOT going to put it in as I am not going to revving much over 6k. I can't get myself comfortable that there will be enough oil in the head with it (I know, I know the S14 had it and was fine).

2002tii race car

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