Should I do a coolant flush? 75k miles..

miringrains · 08-12-2013, 08:09 AM

I'm considering it, although I have a small coolant leak somewhere (need to top off every month)

DRock3d · 08-12-2013, 08:15 AM

My water pump went, seemed like the perfect time to get that done lol

Perceval · 08-12-2013, 08:55 AM

Hi Sir . Yes you should flush every year your coolant. Not the big flushing thing but only open the blue nut under your radiator. This way you will have to change approximatly 70 percent of your fluid. It is good because your coolant lost gradually his properties and became more acid. It cost approximatly 20 dollars.

smallseafishie · 08-12-2013, 09:46 AM

Quote:

Originally Posted by Perceval

Hi Sir . Yes you should flush every year your coolant. Not the big flushing thing but only open the blue nut under your radiator. This way you will have to change approximatly 70 percent of your fluid. It is good because your coolant lost gradually his properties and became more acid. It cost approximatly 20 dollars.

A gallon of BMW coolant is approximately $20 alone.... not including labor or the distilled water for the mix.

bhmax16 · 08-12-2013, 10:10 AM

Flushing every year is a bit excessive. Every 3-4 years for coolant is more than sufficient. I do recommend testing with one of the suction type coolant testers every year though, just to monitor the freeze protection. Also change if it appears dirty or if your oil housing gasket is leaking (you will have plenty of rubber particles in your coolant). I believe they are one of the culprits that leads to premature water pump failure in these cars. I have 82k and still on my original pump

dcat151 · 08-12-2013, 10:11 AM

Every year might be a bit much. I think Mike Miller recommends flushing the coolant every two years. It's not too difficult to do it yourself.

mlifxs · 08-12-2013, 10:19 AM

i did mine at 100k, at year 6. Still on original pump and thermostat. if you want to do early, check out the DIY, not hard at all

Monster900 · 08-12-2013, 10:30 AM

]Every two years is a good idea, that"s what I do.

Gizm0 · 08-12-2013, 10:38 AM

I did a coolant flush at 75k, and noticed a pretty significant improvement. Oil temperature decreased by an average of 15 to 20°F

PichaDis11 · 08-12-2013, 11:38 AM

I would advise you to get the leak fixed before it gets worst. Then do the flush.

08-12-2013, 08:09 AM	#1
miringrains Banned 72 Rep 702 Posts Drives: '11.5 M3 E93 Join Date: Mar 2013 Location: New York iTrader: (2)	Should I do a coolant flush? 75k miles.. I'm considering it, although I have a small coolant leak somewhere (need to top off every month)
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08-12-2013, 08:15 AM	#2
DRock3d Kraut Driver 59 Rep 624 Posts Drives: 2014 650i GC/2011 335is DCT Join Date: Aug 2012 Location: Columbus, Ohio iTrader: (0) Garage List 2014 650i Gran Coupe [0.00] 2011 335is [1.00] 2007 328i [2.00]	My water pump went, seemed like the perfect time to get that done lol
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08-12-2013, 08:55 AM	#3
Perceval New Member 0 Rep 7 Posts Drives: 325i e90 Join Date: May 2013 Location: Quebec iTrader: (0)	Hi Sir . Yes you should flush every year your coolant. Not the big flushing thing but only open the blue nut under your radiator. This way you will have to change approximatly 70 percent of your fluid. It is good because your coolant lost gradually his properties and became more acid. It cost approximatly 20 dollars.
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08-12-2013, 10:10 AM	#5
bhmax16 Lieutenant 164 Rep 401 Posts Drives: '22 M4, '23 CX-50 Join Date: Jul 2011 Location: North Carolina iTrader: (0)	Flushing every year is a bit excessive. Every 3-4 years for coolant is more than sufficient. I do recommend testing with one of the suction type coolant testers every year though, just to monitor the freeze protection. Also change if it appears dirty or if your oil housing gasket is leaking (you will have plenty of rubber particles in your coolant). I believe they are one of the culprits that leads to premature water pump failure in these cars. I have 82k and still on my original pump
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08-12-2013, 10:11 AM	#6
dcat151 Lieutenant 21 Rep 582 Posts Drives: 2006 330i 6MT ZSP/ZPP/ZCW Join Date: Nov 2009 Location: Gainesville, GA iTrader: (1)	Every year might be a bit much. I think Mike Miller recommends flushing the coolant every two years. It's not too difficult to do it yourself. __________________ 2006 Lotus Elise 2006 330i 6MT ZSP/ZPP/ZCW: Euro Air Intake, BMW Performance Exhaust, BMW Performance Strut Tower Brace, M3 upper and lower control arms, Euro Rear Fog Lights, G2 Caliper Paint
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08-12-2013, 10:19 AM	#7
mlifxs Diamond Geezer 212 Rep 2,385 Posts Drives: Jet Black 2007 328i Saloon Join Date: Nov 2007 Location: Florida iTrader: (6) Garage List 2016 VW Golf Sportw ... [10.00]	i did mine at 100k, at year 6. Still on original pump and thermostat. if you want to do early, check out the DIY, not hard at all
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08-12-2013, 10:30 AM	#8
Monster900 Zeed 17 Rep 561 Posts Drives: E92 335i Join Date: Nov 2009 Location: Detroit, MI iTrader: (0)	]Every two years is a good idea, that"s what I do.
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08-12-2013, 10:38 AM	#9
Gizm0 Colonel 426 Rep 2,136 Posts Drives: 08 e92 335i 6mt Join Date: Jan 2013 Location: Virginia iTrader: (1)	I did a coolant flush at 75k, and noticed a pretty significant improvement. Oil temperature decreased by an average of 15 to 20°F __________________ JB4 G5 w/ Backend flash - Walbro 450lpfp - VRSF DPs - VRSF 5" stepped IC - DCI - ER CP w/ Tial BOV - 335is clutch
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08-12-2013, 11:38 AM	#10
PichaDis11 Colonel 295 Rep 2,202 Posts Drives: E90 N52 Join Date: Mar 2013 Location: NY iTrader: (3)	I would advise you to get the leak fixed before it gets worst. Then do the flush. __________________ Retrofits: 322, 609, 6FL, 6NR, 6VC, 2TB.. Upgrades: Bilstein B8 Eibach Spring kit
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