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24valve



Member Since: 07 Apr 2009
Location: Cornwall
Posts: 44

United Kingdom 2003 Range Rover Vogue Td6 Java Black
4.4v8 bmw bleeding coolant

Hi

I hope you don't mind the question.

I had to replace the expansion tank on my 03 4.4v8 the other day as it split down the side.

I've replaced the tank and put a lower pressure cap on it (as per recommended on here and other forums), but I am having trouble bleeding it all.

As it stands now, I've just been out to have a go again and when hawkeye gets up to about 103 deg, coolant spews out of the rear outlet on the expansion tank. I've tried loosening the bleed screw to eliminate air, which it has done, but I seem to be in a vicious cycle of not enough fluid, topping it up then when its up to temperature it coming out of the back again. Its clearly got an air lock because the bottom hose is pretty cold and the top is hot, and the cabin heater is working fine.

Concerned there may be a Head gasket fault or similar, the oil level is fine and a proper colour and the coolant/water I've been putting in is crystal clear, as is exhaust output and oil cap is free of mayo.

Is there any golden advice to getting this bled correctly?

Cheers

neil. 2003 Range Rover Vogue TD6 in Java Black
2003 Range Rover Vogue v8 in Adriatic Blue
1975 Land Rover

Post #527805 12th Sep 2019 2:47pm
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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 146

England 

The best way I found was to back full the system using a hose I pulled one of the heater hoses off poked the hose up it and ran low pressure water threw it leaving the expansion cap off and letting the excess air escape from there refitted the heater hose and ran it up again with the cap off until no more air.
Job done !

Post #527816 12th Sep 2019 4:51pm
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24valve



Member Since: 07 Apr 2009
Location: Cornwall
Posts: 44

United Kingdom 2003 Range Rover Vogue Td6 Java Black

Thanks GSXR.

I might give that a go - I don't know why but I always seem to struggle bleeding coolant with cars and bmw's seem no exception.

I've read the fairly indepth procedure on some of the BMW forums on the v8...still struggled. 2003 Range Rover Vogue TD6 in Java Black
2003 Range Rover Vogue v8 in Adriatic Blue
1975 Land Rover

Post #527835 12th Sep 2019 6:52pm
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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 146

England 

It works for me...the official guide didn't iv a mechanic mate who's rebuilt a few of these and he blows down small return pipe from the rad

Post #527837 12th Sep 2019 7:14pm
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UK Marine



Member Since: 22 Jul 2016
Location: Durham, County Durham UK
Posts: 748

England 2003 Range Rover Vogue 4.4 V8 Zambezi Silver

I’ve had success in jacking up the front of the car while trying to bleed, I read it somewhere that BMW’s appreciate it while bleeding... ______________________________
Simon
______________________________

Range Rover Classic 3.5 efi - Gone
Range Rover Classic 3.9 efi - Gone
Range Rover Classic 4.2 LSE - Sadly gone
Land Rover 110 3.5 - Gone
Range Rover P38a 4.0 SE - Pleased it's gone
Range Rover P38a 2.5 DHSE - Just sold
Range Rover L322 4.4 v8 Petrol - Current

Post #527851 12th Sep 2019 9:14pm
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V8Noise



Member Since: 25 Apr 2015
Location: Maidstone
Posts: 325

United Kingdom 

It is well understood that BMW's all benefit from the front being as high as possible when bleeding. It keeps the expansion tank up in the air and allows garvity to assist the bleed.

e39's and e53's were certainly a case in point.

I make Simon correct. 2006 4.2 S/c
2005 Merc SL350
2012 Dacia Duster Laureate 1.5 DCi
2008 Smart For 2 1.0 Limited 2

Post #527862 13th Sep 2019 6:36am
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