 | Home > Technical > webasto fuel tap anyone ? |
 
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069  
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Anyone with a webasto .. have you fitted or considered fitting a fuel line tap ?
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23rd Apr 2012 7:41pm |
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| tatra805 Member Since: 16 Aug 2011 Location: Dolany Posts: 436  
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yes but didnt do it in the end. rather leave the original fuel system alone.
I understand how it is done and that the webasto pump should seal off, avoiding the webasto to flood under pressure of the original lines but i really preferred to do it this way: 
(pics off blacklandy.de) also saves the hassle of warranty, insurance and MOT in case something goes wrong with the fuel system. my 2 cents only 
PS: BPMan I PM'd you earlier about this, dont know if you've got my message. Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated  |
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23rd Apr 2012 7:50pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7682 
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now that solution from Tatra seems a very good way of doing it. in fact i may revisit fitting one with that idea. Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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23rd Apr 2012 8:40pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069
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I agree, but I would also fit a protection plate to stop stones and muck from damaging the fuel pipe. |
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23rd Apr 2012 10:00pm |
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| tatra805 Member Since: 16 Aug 2011 Location: Dolany Posts: 436
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Thanks but credit where it belongs... the pictures are from the german forum, so not my idea
i did it as described here,.. http://www.defender2.net/forum/topic7878-30.html Been doing lots of off road lately and no leaks. as long as it holds i wont change it. |
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23rd Apr 2012 10:31pm |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 
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I made a hole on the rear floor (like the 99% of the vehicle on the road).
This is not my photos, it came from internet (I'll do same photos during the weekend) Click image to enlarge This is the measurements for the 90 http://ilmiodefender.altervista.org/botola90.pdf and this one for the 110 http://ilmiodefender.altervista.org/botola110.pdf and I installed this one Click image to enlarge Click image to enlarge Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition
IID Pro MV License |
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23rd Apr 2012 11:14pm |
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| pom Member Since: 01 Jun 2010 Location: Worcester Posts: 1343 |
the webasto has its own in-line fuel pump. In fact I have a brand new one in a bag somewhere...
pom |
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24th Apr 2012 12:23pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069
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My concern is the fuel pressure running up against the webasto pump or the webasto unit itself
And if there is any need to isolate it during the summer |
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24th Apr 2012 1:57pm |
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| Paul_1978 Member Since: 08 Nov 2009 Location: South Yorkshire Posts: 384  
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I installed a eberspacher in a merc vito, using the merc instructions.
In this application, i tapped into the fuel return line with a T, worked fine. |
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24th Apr 2012 2:25pm |
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| pom Member Since: 01 Jun 2010 Location: Worcester Posts: 1343 |
there is no pressure, it feeds from the tank directly. |
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24th Apr 2012 5:32pm |
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| tatra805 Member Since: 16 Aug 2011 Location: Dolany Posts: 436
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Pom, the schematics of the puma fuel system are out here somewhere on the forum.
You have 2 loops 1 between filter/cooler/pump 1 between filter and tank You are half right saying there is no pressure but only in the second loop. The first loop is always under pressure, also the return to the filter. This is where people plug in the T as it is the nearest position to the webasto water heater. But it can become a problem once the webasto in-line pump starts leaking and fills the webasto with fuel. + getting air in this side is problematic. If you plug into the second loop, you can as well go to the tank directly as you are that close to the tank already. If you T-off into this return line you will suck dry air if not on a full tank as the pipe does not go deep enough. If you T-off in the suction line you risk again that the webasto pump will not seal off one day and the puma fuelpump will start sucking air trough the webasto. As the puma fuelpump is not self-priming it is a bad idea to my opinion to disturb this fuel line. 2cents |
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24th Apr 2012 6:46pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069
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this is exactly my point, so I am thinking that I can install a fuel-cut-off tap on the feed to the webasto pump for the summer and when the unit is not going to be in use for long periods. something like this Click image to enlarge |
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24th Apr 2012 6:59pm |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586
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No way to install the Webasto fuel line on the Defender loops.
Every time that someone tried the slight loops pressure "disturb" the Webasto (rich and/or irregular burning)........ You need an independent line... Also a non-return valve on the small water pipe on the expansion bottle...... Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition
IID Pro MV License |
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24th Apr 2012 7:11pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069
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I know about the non-return valve
I'm just looking at all the options to connect into the fuel and there are a few 1. seperate tank - ok but no fun filling in the arctic circle 2. T into the existing ... no problems reported by constant pressure on the webasto pump + isloation tap 3. Bean-Can and pipe fitting like Tatra805s - looks to be a good idea but where can I get the fitting from ? 4. drop tank and fit seperate pipe direct into tank like COBS - will i be able to drop the tank without breaking it ? 5. cut hole in floor and tap directly into tank like dgardel - not keen on cutting hole in defender floor I think i'm going to drop the tank - option 4 ... we're moving house soon so I will get a big garage to do this work and no pressure to do all in a day |
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24th Apr 2012 7:19pm |
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