Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
-
- Member
- Posts: 56
- Joined: Tue Nov 01, 2016 12:59 am
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
Mike, is water pump/ thermostat part of your repertoire?
- ph001
- Lifer
- Posts: 3870
- Joined: Mon Oct 31, 2016 5:53 pm
- Location: N. Yorkshire.
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
There are no relays inside the pump but there are a ton of electronics in there which have probably gone faulty. As mentioned before, the stat has no sensors or electronics so is not really capable of causing the pump to run.
- Newbers
- Member
- Posts: 569
- Joined: Sat Jun 12, 2010 12:10 pm
- Location: St Albans (one days march from London)
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
Pump (Pierburg) + stat (Wahler) ordered. I'll pick up some antifreeze from BMW on Thursday - anyone know how much I'm likely to need to replace by the time I'm done?
Coupe, KW coil overs, PSB limiters, Powerflex ARB bushes, 18" CSL reps, Aero skirts, ZHP leather knob, Whippy and proud. Probably needs a wash
- Newbers
- Member
- Posts: 569
- Joined: Sat Jun 12, 2010 12:10 pm
- Location: St Albans (one days march from London)
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
I got a mobile ex-BMW guy out sort out my pump and stat. I gave £165 which included deleting a couple of codes. Quite an expensive episode....
Coupe, KW coil overs, PSB limiters, Powerflex ARB bushes, 18" CSL reps, Aero skirts, ZHP leather knob, Whippy and proud. Probably needs a wash
- Ducklakeview
- Lifer
- Posts: 6362
- Joined: Tue Mar 22, 2016 4:08 pm
- Location: Merseyside
- ph001
- Lifer
- Posts: 3870
- Joined: Mon Oct 31, 2016 5:53 pm
- Location: N. Yorkshire.
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
Did changing the pump solve this OP?
- Newbers
- Member
- Posts: 569
- Joined: Sat Jun 12, 2010 12:10 pm
- Location: St Albans (one days march from London)
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
Yes. That said, I'm not actually sure which was the culprit.
Coupe, KW coil overs, PSB limiters, Powerflex ARB bushes, 18" CSL reps, Aero skirts, ZHP leather knob, Whippy and proud. Probably needs a wash
-
- Member
- Posts: 99
- Joined: Thu May 11, 2017 9:46 am
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
Its a huge draw so look at things that can be attached to the battery that take a large current
My moneys on starter motor or Alternator
My moneys on starter motor or Alternator
Merlot 2.2i SE, so far new discs and pads, seats replaced, Cam cover replaced, Roof now fixed, new diff x3, new halfshafts, new drop links and other bouncy bits,
- Newbers
- Member
- Posts: 569
- Joined: Sat Jun 12, 2010 12:10 pm
- Location: St Albans (one days march from London)
Flat battery, v. high current drain - Fuse No. 8 under bonnet. Water pump continuous...
It was definitely the water pump that simply didn't turn off regardless of whether the car was running or not. I proved this with an ammeter and by pulling the fuse. The point is I'm not sure whether the fault was with the electronics in the pump or in the separate thermostat. Both have electrical connections but I didn't bother to investigate further, I figured replacement of both was quicker and cheaper + gave more future peace of mind than diagnostics.
Coupe, KW coil overs, PSB limiters, Powerflex ARB bushes, 18" CSL reps, Aero skirts, ZHP leather knob, Whippy and proud. Probably needs a wash
- ph001
- Lifer
- Posts: 3870
- Joined: Mon Oct 31, 2016 5:53 pm
- Location: N. Yorkshire.