New fuel tank nightmare - Page 5 - Mercedes-Benz Forum
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post #41 of 50 (permalink) Old 04-15-2019, 10:00 AM Thread Starter
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Originally Posted by reno4u2 View Post
A couple of things to check/try. Keep in mind this was on a 560SL...two fuel pumps.

Are you sure everything is tight? I had to take a spare 17mm wrench and grind it down to make sure it went over the check valve flats...see pics. Normal wrench on left...thin wrench on right.

You wouldn't think you'd have to on new copper washers but google anneal copper washers. Usually done to return used hardened washers to a soft state. Basically you just heat them up cherry red with a propane torch and let them cool naturally.

Last thing would be to make sure the sides of the banjo fitting are smooth and flat. Long shot here but what the hell. A fine tooth file or sharpening stone would work.
I tightened all connections as far as I could get them. Way tight enough to seal if the washers are soft enough. The Amazon washers are probably too hard. They leaked far worse than the original washers that only slowly dripped. I'm fairly confident that the Autohaus washers will work.

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post #42 of 50 (permalink) Old 04-15-2019, 11:12 AM
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Understand Jyuma that generic washers failed you, I was just trying to reassure you in a clumsy manner that Autohaus ones will work OK 👍
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post #43 of 50 (permalink) Old 04-15-2019, 11:25 AM
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Originally Posted by miko1aj View Post
Excuse my ignorance reno4u2 but two fuel pumps in a 560? Holy smoke, that sounds complicated. Are both active in parallel or is it primary / backup circuit?
Actually it's what I would call "in series". Fuel goes into 1 and then down and around under pressure into 2. Leaves 2 and goes to filter..
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post #44 of 50 (permalink) Old 04-15-2019, 12:26 PM Thread Starter
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I just noticed an Autohause bag in my spare parts bin marked 007603-012102. The bag contains 10 new unused copper washers measuring 12mm x 16mm x 1.5mm. According to the Autohause website they are a direct replacement for the 2 types of crush washers used in Mercedes fuel pump plumbing. I'm installing them now (fingers crossed).

Success!

No more leaks... no more smell of fuel in the cabin. It's amazing what the right parts can do.
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post #45 of 50 (permalink) Old 04-15-2019, 03:04 PM
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Originally Posted by Jyuma View Post
I just noticed an Autohause bag in my spare parts bin marked 007603-012102. The bag contains 10 new unused copper washers measuring 12mm x 16mm x 1.5mm. According to the Autohause website they are a direct replacement for the 2 types of crush washers used in Mercedes fuel pump plumbing. I'm installing them now (fingers crossed).

Success!

No more leaks... no more smell of fuel in the cabin. It's amazing what the right parts can do.
I too recently had reduced the gas smell to nothing in my car. The fuel system is stupid finicky. Have to use EXACTLY the right hoses, clamps, and washers or else you get a slight smell.

Glad you're at the point of success... hopefully.
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post #46 of 50 (permalink) Old 04-15-2019, 06:48 PM Thread Starter
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Originally Posted by okyoureabeast View Post
I too recently had reduced the gas smell to nothing in my car. The fuel system is stupid finicky. Have to use EXACTLY the right hoses, clamps, and washers or else you get a slight smell.

Glad you're at the point of success... hopefully.
Took a top down drive around the block today... about a mile... it threatened rain the entire ride and it was cold, but I didn't care... my gas wasn't leaking and all I smelled was the sweat scent of burnt hydrocarbons. Hopefully I increased the global temperature by a gazillionth of a billionth of a degree even if only for a nano-second or two.

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post #47 of 50 (permalink) Old 04-15-2019, 07:50 PM
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Quote:
Originally Posted by Jyuma View Post
Took a top down drive around the block today... about a mile... it threatened rain the entire ride and it was cold, but I didn't care... my gas wasn't leaking and all I smelled was the sweat scent of burnt hydrocarbons. Hopefully I increased the global temperature by a gazillionth of a billionth of a degree even if only for a nano-second or two.
OH,NO! Adding to global warming! What a terrible person! (NOT)
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post #48 of 50 (permalink) Old 04-15-2019, 08:08 PM
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Took a top down drive around the block today... about a mile... it threatened rain the entire ride and it was cold, but I didn't care... my gas wasn't leaking and all I smelled was the sweat scent of burnt hydrocarbons. Hopefully I increased the global temperature by a gazillionth of a billionth of a degree even if only for a nano-second or two.
LOL, whoda thunk that an r107 is the elusive climate control knob?
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post #49 of 50 (permalink) Old 04-16-2019, 01:04 AM
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Reno4u2 - thanks for the explanation, the two fuel pumps look like the same model? I wonder if you'd get away with single fuel pump or are two a must in order to maintain the pressure....
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post #50 of 50 (permalink) Old 04-16-2019, 01:07 AM
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Quote:
Originally Posted by Jyuma View Post
I just noticed an Autohause bag in my spare parts bin marked 007603-012102. The bag contains 10 new unused copper washers measuring 12mm x 16mm x 1.5mm. According to the Autohause website they are a direct replacement for the 2 types of crush washers used in Mercedes fuel pump plumbing. I'm installing them now (fingers crossed).

Success!

No more leaks... no more smell of fuel in the cabin. It's amazing what the right parts can do.
Nice one Jyuma, congrats!

I love that sweet feeling of a surprise "I don't remember having these..." when discovering a gem in the spares cabinet
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