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kanikune



Member Since: 29 Oct 2017
Location: Teerijarvi
Posts: 28

Finland 2004 Range Rover Vogue 4.4 V8 Epsom Green
FBH isolates motor coolant from the FBH and cabin coolant?


Is this for real?
When the FBH is operational, the changeover valve (7) isolates the motor coolant from the FBH and the cabin coolant?
Quote from the L322 manual:
Quote:
The changeover valve isolates the heater coolant circuit from the engine coolant circuit.


Okay, if my hypothesis is true: has anyone removed the part #7 for good?
Any views reasoning why this should be left as it were?
My motivation is: I live in cold climate and sometimes it can be quite cold. I'd rather warm up the motor and give it a easy start than warming up only the cabin.
Your input is appreciated.

Post #501352 12th Jan 2019 9:03pm
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kds2



Member Since: 30 Sep 2017
Location: lincoln
Posts: 218

England 2008 Range Rover Vogue TDV8 Stornoway Grey

With yours being a v8 petrol have you even got the FBH ?

Post #501353 12th Jan 2019 9:16pm
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stan
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Member Since: 13 Jul 2010
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i thought it did both...loads of info in the wiki.. Thumbs Up

Post #501354 12th Jan 2019 9:17pm
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drakes



Member Since: 26 Jan 2009
Location: Consett
Posts: 369

United Kingdom 2010 Range Rover Vogue TDV8 Stornoway Grey

I have a Defender with the same heater in but no diverter valve so it heats both the engine and vehicle interior so there is nothing in the heater to stop you removing or disabling the diverter. I think in the handbook it says something about heating the engine rather than the interior if it is below -20 so I wonder if that temp cold be changed. 2010 3.6TDV8 Stornoway Grey/ Black interior - gone
2005 4.4V8 (M62) Bonatti Grey/ Parchment interior - gone
1998 4.6HSE Blue/ Cream interior (can't remember exact colours) - gone
1977 White - gone (should have kept)

Post #501356 12th Jan 2019 9:18pm
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rjff



Member Since: 28 Oct 2017
Location: Cambridgeshire
Posts: 1193

United Kingdom 2011 Range Rover Vogue TDV8 Santorini Black

As I read it, the FBH operates in parked heating mode to only heat the interior, thus the changover valve sets itself so the coolant goes to the heater matrix only, circulated via a pump in the FBH. Thus not heating the engine.

The FBH will start on engine start to assist in reducing the warm up time, circulating through the engine, and I assume the heater. This helps in reducing emissions.

The changeover valve needs to be energised to isolate the heater from the engine. Perhaps if you remove the supply to the valve, it may stay in the postion necesssary to join the two circuits, then you can fire it up as a park heater and you may find it gives a bit of heat to the engine, prior to starting.

At least that way you will only (famous last words) have to reconnect the valve if it's not satisfactory or gives a fault. Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

Post #501370 12th Jan 2019 10:08pm
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kanikune



Member Since: 29 Oct 2017
Location: Teerijarvi
Posts: 28

Finland 2004 Range Rover Vogue 4.4 V8 Epsom Green

kds2 wrote:
With yours being a v8 petrol have you even got the FBH ?


Yes 100% I have. Have repared the damn fbh control circuit and replaced the burner.

Post #501379 13th Jan 2019 7:38am
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northernmonkeyjones



Member Since: 24 Mar 2012
Location: derby
Posts: 8479

United Kingdom 2016 Range Rover Autobiography SDV8 Santorini Black

Afaik

Park heat - just interior
Cold start - engine

If it can be Removed it will mean that when you run the Park heater all the heat generated will sink into the engine and the cabin wouldn’t warm much even if there was coolant circulating. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Post #501381 13th Jan 2019 8:24am
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Gazellio @ Prestige Cars



Member Since: 22 Jan 2010
Location: Chilterns, UK
Posts: 11309

United Kingdom 2010 Range Rover SE Td6 Zermatt Silver

D3;s without park heat - FBH heats the coolant only and quickly. I use this every day and the engine temp is displayed on dash at start up so happy engine starts every time and immediate warm air shortly after start up. Thumbs Up

Post #501392 13th Jan 2019 10:48am
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

IIRC, diesels need the FBH as it takes so long to get warm so are fitted as standard (although many don’t have park heat option)

Petrol Engines warm quickly hence don’t need the FBH so where fitted as an option, when the FBH is switched on (pre-heatingthe Cabin for instance), the coolant is only directed to the heater matrix. This is then switched to full circuit (including the engine) afterwards. (Think I got that right?)

@OP - lovely car btw. How many miles/km?

Post #501404 13th Jan 2019 12:42pm
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kanikune



Member Since: 29 Oct 2017
Location: Teerijarvi
Posts: 28

Finland 2004 Range Rover Vogue 4.4 V8 Epsom Green

Totally awesome car. I would like to find these same rims for the winter tyres too, but unfortunately these are quite scarce here in Finland.
So far 325 000 km.

Post #501427 13th Jan 2019 3:13pm
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kooky_guy



Member Since: 25 Nov 2011
Location: Sandhurst, Berkshire
Posts: 385

United Kingdom 2010 Range Rover Vogue SE TDV8 Stornoway Grey

I recall reading somewhere that when the temperature drops below a certain value (can't recall what exactly, I'm afraid, but it was quite cold), that the system changes focus and warms the engine coolant instead of the heater circuit. 2010 4.4 TDV8 Vogue SE

Post #501472 14th Jan 2019 8:21am
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