M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: Vladi on June 28, 2007, 11:30:19 AM

Title: Water pump
Post by: Vladi on June 28, 2007, 11:30:19 AM

When should the water pump be changed?:confused:

Title: Water pump
Post by: RED IS 91 on June 28, 2007, 02:19:59 PM

every two years with your coolant flush and new thermostat ?????

Is that an inspection 2  item ?

Title: Water pump
Post by: gearheadE30 on June 28, 2007, 02:27:11 PM

BMW water pumps are notoriously failure-prone. I'd replace them every 2-3 years if the car is driven often.

Title: Water pump
Post by: ecpreston on June 28, 2007, 02:41:32 PM

Quote from: gearheadE30;28718

BMW water pumps are notoriously failure-prone. I'd replace them every 2-3 years if the car is driven often.

They are? Ours have metal impellers, right? I've just had good experiences with them, I would expect at least 100k miles out of a OEM pump, they're just so simple. Only the plastic impeller ones found in a lot of E36s sucked, then I'd agree, every couple of years.

Title: Water pump
Post by: Vladi on June 28, 2007, 04:24:33 PM

Sh*t! I've got an e36 engine with ~160.000km. Better check it. :D

Title: Water pump
Post by: gearheadE30 on June 29, 2007, 06:55:58 PM

my bad, I just looked into it more, our cars have pretty good pumps. It is the e36 ones that sucked so bad. I'd only swap it if you have been having other problems with the cooling system.

Sorry for the confusion. ;)

Title: Water pump
Post by: Vladi on June 30, 2007, 03:10:22 AM

Hm...i've recently changed the water pump on my daily driver (VW Golf IV TDI) and i've noticed that ever since the water needle is sitting about 1mm cooler. :)
Can that happen to our E30's also? :)

Title: Water pump
Post by: Abrax on June 30, 2007, 04:19:03 AM

If You remove the visco system - and install electric fan, not only You get more horsepower, but the waterpump lasts much longer...

But generally - keep new waterpump in the trunk and change it when the old one starts to leak ;)

Title: Water pump
Post by: Vladi on July 01, 2007, 03:12:30 PM

I've got a/c also, what if i take the viscous system out and leave only the a/c fan? It starts at 91 degrees step 1 and 99 step 2.

Title: Water pump
Post by: Abrax on July 01, 2007, 04:29:55 PM

I'm sorry - I don't have any experience with A/C... But I'm pretty sure that it won't work with coolant because it is launched because of high A/C system temperature, not by coolant temperature...