Author Topic: Question regarding fuel tank breather lines  (Read 4505 times)

Bernd

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Question regarding fuel tank breather lines
« on: March 01, 2010, 05:02:44 »
I was wondering if anyone has an exact picture of how the three lines to the fuel tank breather in the rear of the trunk run?
When I took mine apart 20 years ago I cut my lines off without taking pictures. now that it's finally time for reassembly, I am not sure anymore what if anything I was thinking.

I know one goes to atmosphere with he small bell shaped plastic tip attached. How does it run through the trunk to get outside? And are the other two lines just cloth covered rubber fuel lines , or are there rigid metal lines anywhere in the connections?

The parts diagram is not really helpful in showing the course of the lines.

Thanks for any help.

Bernd

bpossel

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Re: Question regarding fuel tank breather lines
« Reply #1 on: March 01, 2010, 10:23:27 »
Hi Bernd,

Setup depends on year of car.
Search on "expansion tank" and you will get some hits.
Look at this post:
http://www.sl113.org/forums/index.php?topic=8709.0

Here is a pic from the manual...


Bernd

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Re: Question regarding fuel tank breather lines
« Reply #2 on: March 01, 2010, 13:01:07 »
Hi Bob,
thanks for the info. My question is actually more simple than that. I have the tank, mine is the early (small) version shown on the sls website. There are 3 lines from it, one goes to atmosphere, the other two back to the tank. All I was wondering was if the lines between the fuel tank and the expansion tank are just rubber lines or if I am missing metal lines? How do they run throught the tank and how does the outside line exit through the trunk floor?
I do know the little tank mounts on the cardboard shield inside the right rear fender, so that part is no problem.

Thanks

bpossel

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Re: Question regarding fuel tank breather lines
« Reply #3 on: March 01, 2010, 13:40:46 »
Bernd,

The 2 small plastic lines on the bottom of the exp tank run into a small hole in the rear of the trunk (left side).  You can feed them through to the 2 connections points on the gas tank by removing the 2 access plates on the inside of the trunk rear.  Mine connect to the gas tank using 2 small sections of rubber gas hose, along with small hose clamps.

In terms of the other lines, you should have 2 holes in your trunk floor close to the exp tank (towards the front of the car).  The rear most hole, hole closest to the body is where the long plastic line runs through the floor and out towards the front of the car.  This connects into the engine.  The font most hole, hole towards the inside of the trunk floor vents to atmosphere using a special rubber grommet.

Pics will help.  Maybe John L. or others have some pics if this?
Good luck,
Bob

Jonny B

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Re: Question regarding fuel tank breather lines
« Reply #4 on: March 02, 2010, 00:15:25 »
I do not have any pictures, but my car has metal lines that run from the cover plate over the gas tank filler pipe to the small expansion tank in the right rear fender. There are small sections of hose that connect from the metal pipes to the gas tank and to the small expansion tank. I replaced the hoses several years back, and had to use a small wire to rod through the metal pipes to be sure they were clear. Once done, the gas odor in the trunk and the interior of the car was gone.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor