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bodstruck



Member Since: 09 May 2020
Location: Wiltshire
Posts: 989
United Kingdom 
Diesel Heater Box
I am sure there is a reason but I could not work out why the available diesel heater boxes were designed to blow air into the rear of the car. The reason I want to install one is because MY feet get cold.

I bought a Mud heater box but in the end I have decided to make my own.
I wanted heat to all four footwells so I bought a 4 way head for the Chinese heater, some 40mm tube and some 40mm swivel outlets.

Still a work in progress but this is what I have so far.


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I have also made another box that clips to the top off this, acts as a lid plus storage. Not sure about that just yet, think I have made it a bit high so more experimenting to do.

Finished article will be covered in black carpet.
Post #1066953 3rd May 2025 6:13pm
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jim4244



Member Since: 13 Apr 2014
Location: Bedfordshire
Posts: 947
England 2013 Defender 90 Puma 2.2 CSW Fuji White
Looks neat Thumbs Up

Jim
Post #1066997 4th May 2025 11:21am
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1264
France 2002 Defender 110 Td5 DCPU Chawton White
Hurray - no MDF!
Post #1066998 4th May 2025 11:41am
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6188
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
Reminds me of an old lightweight I once had, was an ex RM arctic one, and had the remnants of a mahoosive heater between the front seats with 4 pipes like you're fitting going off around the vehicle.
Post #1066999 4th May 2025 12:46pm
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2234
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Looks like a good job well done.
Looking forward to seeing the next phase 👍
Post #1067004 4th May 2025 2:17pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5975
United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Looks good. I wonder if the 4 port head would fit a Eberspacher? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #1067017 4th May 2025 5:10pm
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bodstruck



Member Since: 09 May 2020
Location: Wiltshire
Posts: 989
United Kingdom 
Should fit, I think they are pretty much the same size. For less than a tenner it may be worth a shot?
Post #1067022 4th May 2025 6:09pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5975
United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Deffo worth a shot. My heater lives under the rear seats and for a while I have been pondering a way of getting heat into the front foot wells as well as the rear footwells.
Getting the heater pipes over the middle row seat carpet without being in the way is the issue. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #1067023 4th May 2025 6:22pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 658
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Just be carefull, not to overheat it, because 2 of your heater outlest are next to the heater inlet - it can make a "short circuit", when hot air is passed again into the heater. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1067209 7th May 2025 10:18am
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bodstruck



Member Since: 09 May 2020
Location: Wiltshire
Posts: 989
United Kingdom 
Good point, thanks.

The reason for the swivel heads is to ensure I can direct heat away from the inlet. Also, I don't really anticipate it being on for long periods, just to warm the thing up in the first place really. Once the cabin is warm (and the engine) the std heater does tend to keep up.

I'll see how we go. Worse case I remove it and redesign, it has only cost £15 thus far.
Post #1067215 7th May 2025 10:41am
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revd



Member Since: 20 Apr 2024
Location: England
Posts: 254
United Kingdom 
neat. a diesel heater is one of the best mods for Defenders

I used the Mudstuff box and directed the heat back through the bulkhead (110 Hardtop) - I was surprised how quickly the heat travels forward to the front seats.
Post #1067222 7th May 2025 12:42pm
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SimonR



Member Since: 28 Jun 2012
Location: Horsham, West Sussex
Posts: 77
United Kingdom 
I like your solution with outlets front & rear.


Click image to enlarge

I fitted mine in the battery box. If you buy a 2kW heater - it fits quite neatly! A 4kW doesn't - ask me how I know!
Post #1068481 26th May 2025 4:06pm
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