Adoepner
Posts: 74
Joined: Mon Jul 01, 2019 10:08 am

Espar heater install

Tue Mar 02, 2021 7:29 am

Hi all,

Just in time for winter to be over, I have got my Espar diesel heater install to a functional point. I took a different approach than others and tried to install the heater in the most elegant manner from an engineering / thermodynamics perspective. I wouldn't necessarily recommend that others follow in my footsteps - it was a lot of work to save a few feet of coolant line length and I'm not sure it was necessarily worth it. This is how I think the Mitsubishi engineers would have installed a diesel heater if they had done it from the factory.

Highlights:

1) OEM PTC heater is maintained
2) Espar diesel heater installed inside the LH wheel well.
3) OEM water pump in heating circuit removed.
4) Water pump in the Espar unit does double-duty, running when electric heat is selected or when diesel heat is selected (required modifying the Espar wiring internal to the unit).
5) Coolant tank and all coolant lines insulated with spray foam / Rubatex and foil tape.
6) 4.5L fuel tank installed in front of 12V battery
7) Since 12V battery is blocked, fused lead brought forward for jumping/charging
8) Exhaust running to the rear of the vehicle
9) Filtered air intake beside coolant bottle.

Wiring inside the car is still to be completed. I plan on having a latching pushbutton in the car for ON / OFF (with an interconnect to the fan, so the heater cannot run unless the fan is running) as well as a low fuel light for the diesel tank (using the brass port). I'll maintain a connection for the Espar 7-day timer to be able to read diagnostic codes from the Espar unit, but don't intend to use the 7-day timer in everyday operations.

I have been running the heater using the Espar 7-day timer. What a game changer! Real heat! Warm windshield! Decent winter range! This should have been a factory option for northern climates.

Andrew

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Last edited by Adoepner on Wed Mar 03, 2021 5:33 pm, edited 7 times in total.

tewharaunz
Posts: 5
Joined: Mon Nov 30, 2020 8:23 pm
Location: Charteris Bay, New Zealand

Re: Espar heater install

Tue Mar 02, 2021 2:54 pm

For some reason, I can't see the photos....just blue squares with question marks in the middle.

Cheers.
2012 I-Miev "Black i"

JoeS
Site Moderator
Posts: 3989
Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: Espar heater install

Tue Mar 02, 2021 4:38 pm

EVs: Two '12 Wht/Blu SE Prem., '13 TeslaMS85, three 156v CorbinSparrowsLi(NMC), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab96
Hybrids: 48v1kW bike
Mothballed ICE: Orig.Owner '67 Saab96V4, '88 IsuzuTrooper; '76 MBZ L206D RHD RV

Tiborx8
Posts: 38
Joined: Sat Jun 08, 2019 11:15 pm

Re: Espar heater install

Wed Mar 03, 2021 1:01 am

Great install.

Was it difficult to remove the OEM water pump? I thought that it is one unit with the OEM heater. Is it correct, or it is a separate pump somewhere in the coolant circuit?

ed5000
Posts: 211
Joined: Mon Jul 27, 2015 9:22 pm
Location: Castro Valley, CA

Re: Espar heater install

Wed Mar 03, 2021 11:09 am

Nice install! Maybe with some all season tires you could have the best cold weather vehicle in your area.
2012 ES, Cool Metalic Silver, cold weather package, no quick charge, no fog lights.
2012 ES, Black, cold weather, quick charge, and an optional net for the very back. :mrgreen:

Adoepner
Posts: 74
Joined: Mon Jul 01, 2019 10:08 am

Re: Espar heater install

Wed Mar 03, 2021 5:12 pm

The OEM water pump is easily removed. It is a separate component that is bolted to the cross-car beam that in under the hood behind the rad (the beam on which the 12V battery sits).

I’ll work on the photos. I was able to get Dropbox photos to show up in another thread, but I can’t remember how I did it.

Edit: switched to an image hosting service, https://imgbb.com/ - very easy.

Andrew
Last edited by Adoepner on Wed Mar 03, 2021 5:41 pm, edited 1 time in total.

Adoepner
Posts: 74
Joined: Mon Jul 01, 2019 10:08 am

Re: Espar heater install

Wed Mar 03, 2021 5:41 pm

This is the water pump in the heater circuit.

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Andrew

dracekvo
Posts: 32
Joined: Tue Sep 11, 2018 12:18 am
Location: Czech. Rep.

Re: Espar heater install

Fri Mar 05, 2021 5:07 am

Hello,

nice work.
Here is some photo of my install 4kw heater.

http://elektroforum.cz/viewtopic.php?f= ... t=60#p4838


Where you buy fuel tank? I still (2 years) use 1L bottle from engine oil :D

EDIT: This is your tank? https://www.aliexpress.com/item/1005001875305980.html

Adoepner
Posts: 74
Joined: Mon Jul 01, 2019 10:08 am

Re: Espar heater install

Fri Mar 05, 2021 6:34 am

Yes, that is the tank. I had to carefully crush in one side with a heat gun to have clearance to open the windshield washer fluid bottle. I used aircraft fuel tank sealant to reinforce it (the grey gunk). I also removed and discarded a fan shroud piece behind the rad.

Andrew
Last edited by Adoepner on Fri Mar 05, 2021 2:39 pm, edited 1 time in total.

Adoepner
Posts: 74
Joined: Mon Jul 01, 2019 10:08 am

Re: Espar heater install

Fri Mar 05, 2021 2:38 pm

Also, Dracekvo - your install inspired mine. I copied you a little. Thanks for the idea!

Andrew

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