Fuel pump juggling...

[jaistanley]

I have two cars: a now runnaround 318is and a tidy 325i awaiting an S50 swap.

The fuel pump on the iS has now died and I need to get it running to get to work in. The 325i needs a better pump for the s50 so I got one from an M3Evo E36 to fit and hoped to fit the 325i one to the iS.

Will this work? The iS is a 1990 and the 325i a 1988.

What is the procedure? ie how do I swap the pumps? I know it's not beyond the wit of man to work it out but want to have an idea before I go pr!ck around with fuel in the hot weather...

Do I have to drop the tank for clearance? Are the relavent pipes jubilee clipped and not crimped?

Many thanks.

Jai

[jmc330i]

http://www.e30zone.net/modules.php?name ... chfuel.htm

That should help sir.

Oh and I think all facelift E30 pumps are the same, so as long as the 325i is a facelift you should be ok. I realise its the other way round, but my 318i pump is happily running my 325i engine.

[Brianmoooore]

All facelift E30 pump assemblies are not the same, although the basic pump is, and can be swapped easily enough.
Fuel injected cars continuously pump fuel around in a circle from the tank to the fuel rail, and then the great majority of it back to the tank again. Some tanks have a spigot on them for this return fuel, while others have a second connection on the pump assembly.

[jmc330i]

Some tanks have a spigot on them for this return fuel, while others have a second connection on the pump assembly.

Is the difference age related? Or is there no real way of telling which a car would have without looking - Ive only seen ones that look like the pump in my 325i Sport. Having said that, I havent looked at the 318i touring pump.

[jaistanley]

Thanks for the link guys.. Trés handy.

If I remember I'll have to get some new pipe and jubilee clips to fit the E36M3Evo pump to the 325i so I'll wait till I've had a chance to get to the motor factors.

Many thanks.

Jai