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  #16  
Old 09-18-2010, 03:58 PM
mommamia
 
Join Date: Dec 2007
Location: Maryland
Posts: 508
Thanks for the reply Sixto. When you are ereferring to the fuel thermostat are actually talking about the pre heater? I've identified the lines. What I don't understand is what goes where. This is for a '91 300D and it has the banjo fitting. Am I suppose to remove the line in front(closest to the engine) of the primary fuel filter and attach it to the lift pump? Secondly, input line goes where? Sorry for all of the questions, but I'm still not really familiar with the fuel supply sytem.

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #17  
Old 09-18-2010, 04:16 PM
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smoke gets in your eyes
 
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The lift pump has two fittings - one on top that goes to the big filter, one at the end pointing downward from the fuel thermostat/fuel heater. Simply route the hose from the small filter to the lift pump inlet. Either loop or plug the lines to and from the fuel thermostat. Heck, leave them open.

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87 300D
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  #18  
Old 09-18-2010, 04:25 PM
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smoke gets in your eyes
 
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Here it is in graphic form. I hope your 91 300D isn't too different from this 87 300D.

Sixto
87 300D
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FUEL LEAK! Please help me identify-img_1695.jpg  
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  #19  
Old 09-18-2010, 05:39 PM
mommamia
 
Join Date: Dec 2007
Location: Maryland
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Is it really that simple? I'll give it a shot right now. The other lines can remain open?
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1995 E420 152k
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1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #20  
Old 09-18-2010, 05:41 PM
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smoke gets in your eyes
 
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The fuel remaining in the thermostat/heater circuit will leak out. You can plug or loop the lines.

Sixto
87 300D
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  #21  
Old 09-18-2010, 06:19 PM
mommamia
 
Join Date: Dec 2007
Location: Maryland
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Thanks. That was easy enough. Another fuel leak solved. I had grabbed that pre-heater from the local pick-and pull a few months ago. I decided if it had started leaking again that I would just bypass it. Misson accomplished.
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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #22  
Old 09-18-2010, 07:05 PM
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smoke gets in your eyes
 
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Probably just a worn o-ring in the fuel thermostat.

Sixto
87 300D
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  #23  
Old 09-18-2010, 07:10 PM
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It's apparently common. My car sucked air from the thing and Its been bypassed and I have no issues
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  #24  
Old 09-18-2010, 07:31 PM
mommamia
 
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Yep. It was sucking air. and it was causing a rough idle accompanied with white smoke.
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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #25  
Old 09-19-2010, 07:18 PM
Unofficial wormcan opener
 
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Quote:
Originally Posted by Aquaticedge View Post
It's apparently common. My car sucked air from the thing and Its been bypassed and I have no issues
Mine leaked there as well. I just replaced the o-ring, problem solved.
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  #26  
Old 09-29-2010, 03:55 AM
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Join Date: Sep 2010
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Mine looks like this. Can it be refurbished with O-rings as well?
[IMG]http://www.***********************/images/product_images/thumbs200/WORLDPAC/W01331603611OES.JPG[/IMG]
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  #27  
Old 09-29-2010, 06:07 AM
mommamia
 
Join Date: Dec 2007
Location: Maryland
Posts: 508
There is a kit that sold to repair it. It's actually you auxiliary waterpump.
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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #28  
Old 09-29-2010, 08:48 PM
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My auxiliary water pump looks like this. And diesel doesn't leak from it.
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  #29  
Old 09-29-2010, 08:54 PM
mommamia
 
Join Date: Dec 2007
Location: Maryland
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Well it shouldn't leake diesel because it doesn't come in contact with itl If either one of your fuel pumps were leaking, it would be coolant.
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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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  #30  
Old 09-29-2010, 08:55 PM
mommamia
 
Join Date: Dec 2007
Location: Maryland
Posts: 508
I meant waterpumps not fuel pumps.

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k
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