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Have to drop exhuast when removing heat shield for under passenger seat diesel heater install?

884 Views 33 Replies 9 Participants Last post by  phil
Hello great hive mind,
I am planning on installing a diesel heater under the passenger seat as so many people have also done. I've watched a lot of videos and everyone seems to skim over "just drop the heatshield" during the install videos/documentation.
I was expecting to just find the black plastic pins that you put wood screws into to pop up but found that I dont have those and everything is bolted in in a way that seems I'll also need to drop the exhaust for this procedure however I've never heard anyone mention that during install videos (or I'm maybe not paying enough attention?).

I have attached some pictures and circled the bolts and mounts holding the heat shield and the exhaust up that I believe need removed to get access to drill my hole under the seat and run the heater exhaust and intake hoses, fuel line, ect.. I would love some confirmation that I'm not too crazy here and that letting the exhuast dangle for a bit while I do this install shouldnt hurt anything. I got the van with 19k on it but I'm guessing someone had to drop the heatshield at one point and just bolted it back in since there are not any of the plastic pins holding that part in.
Anyway, thank you for any advice or confirmation on what I have pictured. I'm also happy to get more pictures if needed.
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Four bolts towards the middle of the van holding the exhaust and heat shield (the black push pin that is pictured is for a separate part of heatshielding)

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The mounting piece of hardware and bolt that is supporting the exhuast and holding in the heatshield. There is another single bolt on the right hand of the picture that is out of view but it looks the same. I couldnt get a pic with both bolts in it from under the van.

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This seems to be the whole area that needs dropped. 4 bolts in the back and there are two bolts in the front. Those 6 seem to hold in the heat shield and the exhuast. Am I good to drop this all out while I'm doing the install or are there some precautions I should take with supporting the exhaust while it's unbolted from those mount points?

Thanks in advance! Hope this makes sense.
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MMXVI - L2H2 in Indiana
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I pre-bent the exhaust pipe before installing the heater, it goes one side of the shield
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intake tube, wires and fuel line(in wire looms) go on the other side
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intake tube is looped around and tucked up above the shield so it stays clean
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If you want you can start to deconflict the heater and seat base (so each can be removed on their own), this is my oval hole (with the cutout covering the hole), you may have to move the hole forward to clear the rear bars.
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this block of wood levels me out and lift the heater, you don't need the heater blowing on bars, I pre-plumb the 3 hoses so all I need to do is tighten the hose clamps.
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I second what Phil did. The raised platform for the heater. I used a metal plate for mine. All I need to do to remove the heater now is remove the 6 screws holding the plate down, lift the plate up 2-3 inches, then disconnect the heater. No crawling under the van anymore.

removing the passenger seat is optimal but makes things go quicker.
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Contra the advice above (which probably works too!) I found this location is tight but fits. It will not work with some of the longer (~17") chinese knockoffs, but I've putty the shorter chinese models and genuine webasto and espar which are closer to 12" in this spot. No need to added plates or anything.

And it leaves for for a 125AH 12v battery under the seat as well.

 

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Hello Promaster Owners,

I last wrote when I was in the process of installing the Espar heater M2- B4L That was a few months ago and I am still at it - SInce installation the heater works for anywhere from 8-20 minutes and stops. This has happened over 20 times - P000129 error code meaning that the flame goes out. I read up on many sources which have the fault codes explained but not too helpful- I e-mailed the manufacturer who advised me to relocate the fuel pump to shorten the distance between the fuel tank and the fuel pump. I have been underneath the van 3x (lots of swearing between hubbie and I ) and cannot decide what might be the best place. I have it placed on a beam underneath which is about 30 inches from the fuel tank/doorman. I wondered if anyone else found that they needed to relocate the fuel pump to improve the performance of the fuel pump??? I felt good about finally getting it installed under the passenger seat, but if the darn thing wont work for longer than a few minutes, its not too helpful. I know people have located the heater itself in different area and there are pros and cons to diff locations, but it seems to me that irregardless of where the heater itself is located, everybody has to hook into the doorman nipple and if we are trying to minimize the run legth of the fuel line from the fuel tank to the fuel pump, there must be some general consensusus on where to put the fuel pump. I have looked at pictures but difficult to tell the orientation. For instance the picture on this post from DETstru shows the fuel pump - Is this mounted in back of the gas tank. Am I looking at the drivers side wheel in the picture.

Another suggestion he made was to lower the angle of the fuel pump - this suprised me as it is direct contradiction to the installation instructions which say between 15-35 degrees. Has anyone found that they needed to lower (flatten) the angle like he is suggesting. He states it will help it run richer if I do both of these things. Although I had the pump itself at about 25 degrees, the fuel line looped up at a more acute angle so maybe that may be it??

I am really at wits end - sooo dissapointed after all the work with no real results. Does anyone know of a shop (I live in Massachusetts but would probably travel quite a ways) that might be willing to help with this last part of the install.

Thanks for all your help.

Klooeys Owner
 

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yes Lola, it is according to the instructions as far as the angle. Can you recall specifically where you placed the pump. I did watch your video and I thought it was excellent - but I still cant tell where underneath the van that guy drilled the hole for the fuel supply pump?
 
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