Coolant Bleed Procedure

Phil325i · 09-14-2020, 08:32 AM

OK, tried to bleed coolant system (electric water pump):

Switch on ignition (don't start)
Temp to max
Fan to min
Trottle pedal to floor for 10secs.

Nothing happens. After 10-15 secs the dash display simply shuts off. Pump doesn't start.

Any ideas?

TheMidnightNarwhal · 09-14-2020, 08:36 AM

TIS says to put headlights to on so that the car doesn't turn off. Maybe try that?

Emilime75 · 09-14-2020, 08:46 AM

When I did mine I set my headlights to off, otherwise the same steps as OP.

OP, are you sure you're turning the ignition on? You need to press the start button twice without pressing the brake(clutch if you're MT). Pressing it once puts the car in accessory mode. Pressing twice turns ignition on.

Still a little odd that the dash lights would just turn off. Might be having some other issue there.

Phil325i · 09-14-2020, 09:29 AM

Spot on Emilime75. Hadn't pressed the start button enough times. Doh! Thanks everyone.

Emilime75 · 09-14-2020, 09:41 AM

Don't forget to have a battery charger connected while doing the procedure.

Phil325i · 09-14-2020, 11:46 AM

Quote:

Originally Posted by Emilime75

Don't forget to have a battery charger connected while doing the procedure.

Hmmm. Didn't do that. My battery's pretty strong. Any particular reason?

Emilime75 · 09-14-2020, 11:55 AM

Might be OK without it if the battery is in great shape...it's just a highly recommended thing to do anytime you'll have the ignition on for a while as these cars are heavy on the electrical side and tend to drain it quickly, often causing other issues. Running the water pump puts an additional load on it.

It's also best to disconnect it at the ground terminal when working on the car, especially if you have to unplug anything electrical. Just a safety/best practice thing to keep the various modules in the car as happy as they can be.

Meeni · 09-16-2020, 06:53 AM

Quote:

Originally Posted by Phil325i

Hmmm. Didn't do that. My battery's pretty strong. Any particular reason?

Could drain the battery and leave you flat.

Phil325i · 09-16-2020, 11:47 AM

Quote:

Originally Posted by Meeni

Could drain the battery and leave you flat.

Thanks. But all was good as it happens.

fgpalmer71 · 09-16-2020, 08:30 PM

Quote:

Originally Posted by Phil325i

Thanks. But all was good as it happens.

Congratulations.....I just did this last week without hooking up to my charger. I now have a new battery in a car I bought 2 months ago, that just had a new battery installed in it!!

09-14-2020, 08:32 AM	#1
Phil325i Brigadier General 639 Rep 3,215 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Coolant Bleed Procedure - what am I doing wrong..? OK, tried to bleed coolant system (electric water pump): Switch on ignition (don't start) Temp to max Fan to min Trottle pedal to floor for 10secs. Nothing happens. After 10-15 secs the dash display simply shuts off. Pump doesn't start. Any ideas? __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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09-14-2020, 08:36 AM	#2
TheMidnightNarwhal Major General 2816 Rep 6,390 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	TIS says to put headlights to on so that the car doesn't turn off. Maybe try that?
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09-14-2020, 08:46 AM	#3
Emilime75 Colonel 1227 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	When I did mine I set my headlights to off, otherwise the same steps as OP. OP, are you sure you're turning the ignition on? You need to press the start button twice without pressing the brake(clutch if you're MT). Pressing it once puts the car in accessory mode. Pressing twice turns ignition on. Still a little odd that the dash lights would just turn off. Might be having some other issue there.
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09-14-2020, 09:29 AM	#4
Phil325i Brigadier General 639 Rep 3,215 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Spot on Emilime75. Hadn't pressed the start button enough times. Doh! Thanks everyone. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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09-14-2020, 09:41 AM	#5
Emilime75 Colonel 1227 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	Don't forget to have a battery charger connected while doing the procedure.
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09-14-2020, 11:55 AM	#7
Emilime75 Colonel 1227 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	Might be OK without it if the battery is in great shape...it's just a highly recommended thing to do anytime you'll have the ignition on for a while as these cars are heavy on the electrical side and tend to drain it quickly, often causing other issues. Running the water pump puts an additional load on it. It's also best to disconnect it at the ground terminal when working on the car, especially if you have to unplug anything electrical. Just a safety/best practice thing to keep the various modules in the car as happy as they can be.
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