For when glow plugs are not enough

[SuperCow]

After building the A/C in my 190D 2.5, i want the opposite option of the A/C an Auxiliary heating.
The winter can get cold here in the Netherlands.

First i bought a used set on ebay Webasto BBW 46:


It came from a W124 M102 petrol, and I have a W201 diesel, modifications needed, just how i want it

First to clean up the Webasto.



Then the cable-loom of a W124 is completely different.
Lucky i have alot of schema's include the webasto W201

[SuperCow]

The W124 has a automatic heating, and the W201 euro version has a manual heater.

Rebuild loom:


I also did a test-run of the rebuild Webasto, the languages is Dutch, sorry about that.

Webasto dbw46 testrun - YouTube

To convert a petrol webasto BBW 46 to Diesel, DBW 46 is to change the burn fleece to a diesel one.
The ECU is usable for both petrol and diesel by wiring little bit different.

Thats now for all, next thing is building it in my car.

[SuperCow]

To supply the Heater of enough juice, i have a 100amp battery from Mercedes
The biggest that will fit.

[SuperCow]

I'm also trying to use a other timer.
The original one is quite big, and you need to cut a hole in your tunnel console.

So ill try to get this one to work:



I have to amplify the start signal, this one is 9v @ 10ma
Also im going to add a remote starter for the heater.

[Stretch]

Where are you going to fit this little jet pack then? Is there much room behind the dash on a W201 (I'm still finding my way around them at the moment)?

[SuperCow]

Its placed under the hood, next to the cooler tank.
Here is a pic from a 190E 2.6, its the same location

[Stretch]

Oh cool (or should I say hot...)

So this is also using the existing heater matrix? Or do you need a separate one - I can see the hoses going round the back of the engine but I can't see if they connect via a T joint to the existing system or not. The return line on the car heater system looks untouched...

...so how's it done?

[SuperCow]

Yes, its using the original heater core.
Its between the in-lead of the heatercore.

[Stretch]

Oh I see it'll be in series but isn't it then dependent on the thermostat (on the existing system)? Unless there's a bridge between the return line and the supply line from the heater core (controlled by a thermostatic switch and valve). So in principle you could have a stone cold engine and a warm heater core so long as the battery lasts... and the fuel in the tank of course...

[SuperCow]

It heats the engine aswell.
Its using its internal waterloop so no thermostat.
The heater has his own electric water pump.

The dbw heater warms the coolant, then it flows to the heatercore.
Then it flowes though the heatervalve(that will be open) back to the engine
From the engine it flows back to the dbw heater, and repeat process

When the coolant reaches 55 degree Celsius, the blower motor is activated.
Maximum time is one hour, if your fuel/battery last.
If your voltage drops below 10.5 volts is shut off.

[Stretch]

Wow - well I guess you're "winterklaar" (in a bit when you get it fitted!)

In aircraft terms you've got a nice little auxiliary power unit (APU) there

[Stretch]

I get the feeling that like me most people won't have understood the benefits of this adaptation.

I reckon you'll generate a lot of interest if you get a moderator to add in something like "for when glow plugs are not enough" to the title

[compu_85]

Webasto heaters are so nice... run it for 10 minutes and the engine AND cabin are warm. For those that don't know these have a temp switch in them that turns on the cabin blower once the coolant is hot, warming the interior.

-J

[cooljjay]

That's cool! Even though I would rarely use something like that....I want one on my w123 just for the cool factor! Sorry, I love gadgets

[compu_85]

Webasto has been OEMing those heaters for years... at least since the early 80s. The factory integration is nice. I'd love to have them on my cars too.