[Mk2] [Turbo] water pump differences rev2/ rev3

[petemr2]

Hi im doing a timing belt in a mates mr2 have done mine many times with no issue but this always is a tooth out either side he got the water pump an old one was thrown away car been standing ages.

at my witts end an i can only guess he got a pump for a rev3 as his is a rev2 maybe extra tooth throwing it out??

This pump has 23 teeth an idea what the rev 2 should have??

many thanks

[toecutter]

I had the same problem with a cheap pattern water pump.
It wouldn't time correctly. Pulley had 23 teeth, bought a genuine pump, it has 22 and it timed fine with that.

[petemr2]

Seriously!!
That must be the problem I've had the belt on an off more times then I care to imagine an it won't time right at always out it is a eBay pump though its the only thing I can think it can be.
Never had this prob before.

[bobhatton]

Seriously!!
That must be the problem I've had the belt on an off more times then I care to imagine an it won't time right at always out it is a eBay pump though its the only thing I can think it can be.
Never had this prob before.

There it is again the one word that gives so many problems "ebay"

To stop getting all the problems try "Toyota"

[petemr2]

Ive a pattern pump on mine an it timed up fine that was three years ago.

Bizarre on this situation but i may have to tell him to get a genuine if it doesn't go tomorrow.

never had the prob before nice to know im not the only one

[petemr2]

Got it timed up today think i was trying to rush after work an that but all done

Really should get mine on road soon been sitting two years +.
Driving this one has really made me miss the old MR2

[Peter Gidden]

Ive a pattern pump on mine an it timed up fine that was three years ago.

Bizarre on this situation but i may have to tell him to get a genuine if it doesn't go tomorrow.

never had the prob before nice to know im not the only one

The correct pump would probably do.

[greeny]

Surely the water pump pulley shouldn't have any effect on the timing aslong as the belt is tensioned correctly. It just spins.

[BrianUK]

With Greeny on that one - the number of teeth on the pump would only affect the tension?

Brian

[toecutter]

It does affect the tension, to the extent I couldn't get the belt to sit correctly over the cam pulleys while having no slack from exhaust pulley to crank.