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Home > Maintenance & Mods (L322) > Bleed Screw Fix? - PTFE Teflon Tape (Coolant Loss)
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Bellini



Member Since: 11 Jan 2012
Location: Berkshire
Posts: 2261
United Kingdom 2007 Range Rover Supercharged 4.2 SC V8 Zermatt Silver

Sorry Ryan, but there's only one thing that'll save you now. It's the Ghostbusters song...

When something's wrong
Under your SC's hood
If it's something weird
And it don't look good
Who you gonna call?
The MAIN DEALER!!

Apologies for the misplaced humour, but I think you've got to take it back. Si. <This is my name.

I eat rat poison.

A man ain't truly been insulted until he stands buck naked in front of a woman and she didn't even notice. Or care.
Post #266192 19th Jun 2014 9:15am
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pld118



Member Since: 25 Mar 2013
Location: Bairns
Posts: 4218
Scotland 2014 Range Rover Vogue SDV6 Santorini Black

Laughing
Post #266193 19th Jun 2014 9:26am
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pld118



Member Since: 25 Mar 2013
Location: Bairns
Posts: 4218
Scotland 2014 Range Rover Vogue SDV6 Santorini Black

Definitely originates from bleed screw loss which seems stable because let the car idle for about an hour in the garage this morning and nothing leaking then or since, as well as the fact that the heat from the engine dried up all of the remaining coolant residue that was sitting on engine bay components.
Post #266233 19th Jun 2014 1:30pm
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stan
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Member Since: 13 Jul 2010
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United Kingdom 

see, i told you you had a screw loose.. Laughing ... - .- -.




Y. O. L. O.
.
Post #266247 19th Jun 2014 3:09pm
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pld118



Member Since: 25 Mar 2013
Location: Bairns
Posts: 4218
Scotland 2014 Range Rover Vogue SDV6 Santorini Black
Cracked it?

Yes Stan but you've not told the forum why! Laughing

Right. Here's my DIY positive update after 2 days of irritation.

I'm declaring the cause of the coolant 'leak' as being due to the the expansion tank bleed screw. I do suspect it wasn't closed properly during recent garage works.

This afternoon, with the engine sufficiently cooled, I couldn't understand why the coolant expansion tank still looked like this and wouldn't settle/ drain the pink coolant back into the lower tank/ within the range fill markers:



As the tank and engine were cooled down, I removed the expansion tank fill cap. Still, the pink coolant remained as pictured above within the 'upper chambers' of the tank.

So - with tank fill cap still off - I also then removed the bleed screw and the pink coolant instantly drained away back down into the tank and settled properly as pictured below, showing that in fact, I've got slightly more coolant in the tank than the range fill parameters require. However, I don't think it's such an excessive amount as to be unduly concerned; and whilst I monitor the performance of the bleed screw over the coming days, that excess might actually serve me well:



I then, for now preferring PTFE Teflon plumbers tape to rubber o-rings, carefully wrapped some fresh PTFE tape around the bleed screw thread before re-inserting the bleed screw in the tank and closing it, careful not to overtighten.

Took the car for a spirited driving in sport mode up and down the motorway, got it at full operating temperature and the needle hasn't moved from approx 12 o'clock/ perfectly normal temperature. There are no warning messages and thus far, no leaks from the bleed screw or anywhere else!

Simple to you perhaps but a challenge to me Wink

Fingers crossed Thumbs Up
Post #266269 19th Jun 2014 4:35pm
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sweaty1



Member Since: 15 Mar 2016
Location: kent
Posts: 5
England 2006 Range Rover Vogue 4.4 V8 Tangiers Orange

I know the sis an old post but if your bleed screw has an `O ring then take it off and refit it reversed . They compress and taper over time . If not then new one or PTFE tape . O ring better fix though 2006 Thailand G4 Event Press Vehicle and still working hard
Post #395617 12th Jul 2016 9:02am
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Joe90



Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6419
England 

Or use gasket sealant or similar, that worked for me Wink .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember Wink
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999
Post #395715 12th Jul 2016 6:56pm
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