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  #21  
Old November 13th, 2012, 03:13 PM
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mark kellgren
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I didn't know you could mount those webasto's vertically! Damn. I'll have rethink mine to see if I can gain some room!

Well, routing looks ok to me.
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  #22  
Old November 13th, 2012, 04:53 PM
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Quote:
Originally Posted by aosias View Post
I think it is. I've attached photos of the set up. I checked the hoses this AM while it was running and all of them were warm. It seems to be doing its job, it's when I turn it off and switch it off and go to the truck heat that I have the issue.

How do I check the hot/cold flap on the heater?
First, you have it installed after the heater. This is better for heating up the engine, but no good for heating the cab.

The hot/cold flap is the cable on the top of the heater. It should be pushing tightly. If it is loose, pop the clip off the cable housing, push the housing so the cable is tight and pop the clip back on.

You can leave it running while driving.

As stated before, if the engine cools off quickly, the thermostat is leaking. Is there any heat in the upper radiator hose? If so, it is leaking.
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  #23  
Old November 13th, 2012, 05:01 PM
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Quote:
Originally Posted by Red90 View Post
First, you have it installed after the heater. This is better for heating up the engine, but no good for heating the cab.

The hot/cold flap is the cable on the top of the heater. It should be pushing tightly. If it is loose, pop the clip off the cable housing, push the housing so the cable is tight and pop the clip back on.

You can leave it running while driving.

As stated before, if the engine cools off quickly, the thermostat is leaking. Is there any heat in the upper radiator hose? If so, it is leaking.
Thanks John. I'll check the hot/cold flap.

Upper radiator hose is warm too. Going to order a new thermostat. Cardboard on the grill didn't seem to do much this AM. Air is still luke warm at best and there is a 30 degree temp drop in the coolant from turning off the Webasto and firing up the motor.
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  #24  
Old October 30th, 2013, 08:32 AM
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thomas
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Alex,

Look at this image. I am also going to email the tech at webasto and I will put any finding here. I think you have the heat going into the engine and then it gets to you after running through the cold block. I have mine go through the heater matrix then to the engine.

If you swap these it may work, just keep an eye on it so you don't choke off the flow to the engine.
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  #25  
Old October 30th, 2013, 09:14 AM
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Swapping those pipes will make it flow backwards to what the water pump is moving. It will mess up the flow of coolant.
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  #26  
Old October 30th, 2013, 09:29 AM
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Quote:
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Swapping those pipes will make it flow backwards to what the water pump is moving. It will mess up the flow of coolant.
When I did mine I disconnected the hose and started the engine to get the flows correct.... Thanks for catching the error. Here is a better pic
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  #27  
Old October 30th, 2013, 10:26 AM
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Quote:
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When I did mine I disconnected the hose and started the engine to get the flows correct.... Thanks for catching the error. Here is a better pic
Alex, send me your email address please. Webasto confirmed that the websto flow needs to go to the heater first. They are going to have a tech email me and I can send you the contact info.
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  #28  
Old October 30th, 2013, 10:37 AM
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The supply is the one at the back of the head. The return goes to under the thermostat housing. It does not matter which is the inlet or outlet for the heater matrix.

You need to make sure the Webasto is pumping in the correct direction. It is preferred to be before the heater to help it work better. It does not "have to" go to the heater first.
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  #29  
Old October 30th, 2013, 02:58 PM
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Alex,

Here is the email I got back.
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  #30  
Old October 30th, 2013, 03:49 PM
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Quote:
Originally Posted by Red90 View Post
The supply is the one at the back of the head. The return goes to under the thermostat housing. It does not matter which is the inlet or outlet for the heater matrix.

You need to make sure the Webasto is pumping in the correct direction. It is preferred to be before the heater to help it work better. It does not "have to" go to the heater first.
I pulled the Webasto out to the equation- drove the truck. Had heat. Glorious "hot for a Rover" heat.

From what I am reading, I need to take the hose that comes out of the top of the motor (part 16 in the LR diagram) and run that into the Webasto where Thomas has the first arrow. And then go from the Webasto to the heater unit- taking the pipe from the bigger arrow on the right and connecting that one to the heater unit from the Webasto.
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  #31  
Old October 30th, 2013, 03:56 PM
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1) Hose from back of engine to inlet of Webasto coolant pump (right side of picture).
2) Hose from outlet of Webasto heater (left side of picture) to heater.
3) Hose from heater to line going to front of engine.

Make sure there is no air trapped in the lines before turning on the Webasto. You should run the engine well first to purge out the lines. It helps to have the webasto mounted lower to avoid air pockets, but it is not mandatory.
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  #32  
Old October 30th, 2013, 04:04 PM
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I'm with you until I connect the heater to the front of the engine. Are you saying take Hose #8 from the LR diagram and connect that to the heater unit?
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  #33  
Old October 30th, 2013, 05:54 PM
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I think I figured it out and it works. I haven't tested the Webasto running yet but I have heat with the Webasto plumbed back into the set up.

I ran the hose from the rear of the motor to the Webasto and then a line from the Webasto to the heater unit and the heater unit to the hose that connects to the front of the engine (I realized that after looking at the motor with the insulation off).
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  #34  
Old October 30th, 2013, 06:50 PM
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Yah, that looks fine.
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