From my experience with a 2006 FBH and a 2010 FBH in my colleagues vehicle, the interior and engine are warmed. Hence his defrosted windscreen and warm interior on a frosty morning..... Land Rover Addict
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Thrasher wrote:

From my experience with a 2006 FBH and a 2010 FBH in my colleagues vehicle, the interior and engine are warmed. Hence his defrosted windscreen and warm interior on a frosty morning.....

My 2006 TD6 is lovely and warm inside every morning

When I took my 3.6 TDI in for iot's first service I thought there was a fault with the FBH as the engine did not seem to be warmed at the end of the FBH cycle. It had always done so on my previous 3.0 TDI version.

When I picked the RR up afterwards I spoke with the dealer's FBH expert about it as nothing had been done. He said that the old BMW 3.0 engines did get warmed by the FBH as well as the cabin, but the new (Jag, I think) 3.6 engines do not. This is because the glow plug type preheating is much improved and the need for any engine preheating is removed and all the FBH output can be aimed at the cabin.

Don't know about the nice 4.4 though

Avi wrote:

[My 2006 TD6 is lovely and warm inside every morning

That's the point.  
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

Soooo... based on Dan's, Thrasher's, and Stocky's replies - and my (unbelievably profound ) experience with Webasto FBH's, I'm going to guess that the changeover valve is only closed for the first part of the burn cycle (only cabin heating) and opens to warm the entire cooling system at some threshold temp. That would mean that in mild temps (around 0°C) and long burn times (close to the full 1/2hr) both motor and cabin would be warm. And in the inverse situation - very cold outside temps and driving off after only 12-15 mins of burn time - possibly only the cabin would be warm because the FBH had not yet had time to sufficiently warm the interior and then start warming the engine.

Stocky - do you remember if this was the case? You say 'at the end of the FBH cycle', after the full 1/2hr? Was it very cold? The reason I ask is because I can't imagine that they would have programmed that out of the system. Internal combustion engines, regardless if diesel or petrol, are quite inefficient on cold start both emissions-wise and consumption-wise. The FBH on the other hand, burns quite efficiently and, despite its using fuel and producing CO2, reduces overall consumption and emissions (Webasto sales brochure). So you can be decadently comfortable AND green! I wouldn't trust a dealer tech's answer on this either. The info available to the techs on sub-systems such as the FBH or satnav is quite superficial.

And, now that we've studied the ins and outs of the FBH changeover valve in great detail, I feel much wiser. But my diesel FBH still has no pre-heat function. I have to find time to play with all the stupid software I've managed to pick up. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

I read somewhere, and now cant find it... that on some cars with the same/similar system the engine heats first and then you get interior. There is no point firing the fans up in the first 10-15 minutes if the coolant is still cold - the reasoning behind this (and it makes sense) is that it conserves the battery power.

I wish I could get the Webasto software to work, it's so frustrating that it doesnt!

D 

FBH fact of the day is that when the exterior temp is less than 5C the heated mirrors come on with the FBH so they are pre-defrosted. I presume they are relatively low ampage so don't drain the battery too much. 

SteveMFr: As I understood it the ability to warm the engine was removed on the 3.6. Whether that is by removing a physical connection to the block or if it is simply programmed out, I'm not sure. I would assume its programming.

I haven't seen the workshop manual detail for the 3.6. Maybe someone can check both 3.0 & 3.6 details and see if there is a connection difference.

this might be of interest..on the RRS forum they are talking about GSM/mobile phone control of the FBH..



link.... http://www.rrsport.co.uk/forum/topic19904.html ... - .- -.




Y. O. L. O.
.

Stocky wrote:

SteveMFr: As I understood it the ability to warm the engine was removed on the 3.6. Whether that is by removing a physical connection to the block or if it is simply programmed out, I'm not sure. I would assume its programming.

I haven't seen the workshop manual detail for the 3.6. Maybe someone can check both 3.0 & 3.6 details and see if there is a connection difference.

The FBH is attached to the cooling system. It is inline (series) with the motor/radiator and heater matrix. Short of adding a second heater matrix (this would amount to a second coolant system), there is no way to remove the FBH from the cooling system. The changeover valve simply diverts the coolant from flowing back to the motor/radiator and creats a short loop between the FBH and the heater matrix.

The FBH is in the TDV8 RR for the same reason as in the TD6 - not enough waste heat to heat the cabin properly at very cold temps. The pre-heat function is a side-benefit of this necessity. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

Just trying to guage if this is normal ?

I'm struggling to describe the noise my FBH sometimes makes, but it's similar to when you swing a flexible piece of pipe round your head (I remeber this from being a kid ) or like an old kettle boiling on the stove. Like a low whistle/blowing noise that i can hear from the passenger side.

I would liken the sound mine makes to a small jet engine. Starts off quiet and then speeds up/gets louder. There is a high speed exhaust fan in the unit, this is what creates the sound.

 

These single cylinder units wind up like a turbo fan as Dan describes. I have one on my Frankia Motorhome for the heating system and its clearly audibal but in the RR it is harder to hear due to sound proofing.

It definitely warms the engine on the TDV8 as well as the cabin.

I don't appear to have it installed. I checked where Dan told me to look, but there's no module there  2010 MY Vogue SE TDV8 3.6 Stornoway Grey- fully loaded

noddy wrote:

I don't appear to have it installed. I checked where Dan told me to look, but there's no module there

You dont have the RF Reciever - but you should still have the FBH unit... See the FBH any TD6 thread for more info.