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Author Topic: Fuel filter housing  (Read 1833 times)

afibbe

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Fuel filter housing
« on: November 28, 2022, 23:57:30 »
The attached picture showing the top of the fuel filter holder. There are two bolts and I wanted to know what they do.

The large one will not unscrew. I have not tried holding it in a vise. I am worried about breaking the part while trying to unscrew the bolt.

I was able to unscrew the small one and the seal needs to be replaced. Where can I find a replace seal?
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Alex Fibbe
1966 230SL
USA, Cincinnati, OH

wwheeler

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Re: Fuel filter housing
« Reply #1 on: November 29, 2022, 01:54:22 »
The small one is an air bleed which usually not needed. It just uses a copper seal ring.

It has been many years since I disassembled this unit but pretty sure the large bolt is a plug. Correct me if I wrong though. I don't believe it has a seal since it is not supposed to be removed. I did remove mine and just used a thread sealant when it was reinstalled. I took the plug off to be plated.
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Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

MikeSimon

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Re: Fuel filter housing
« Reply #2 on: November 29, 2022, 12:54:14 »
Sometimes, holes are drilled into cast parts that are needed for machining internal passages. They are then plugged.
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1970/71 280SL Automatic
Sandy Beige
Parchment Leather
Power Steering
Automatic
Hardtop
Heated Tinted Rear Window
German specs
3rd owner

jim 56

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Re: Fuel filter housing
« Reply #3 on: December 22, 2022, 12:35:28 »
I put a pressure gauge in where the large screw is and it helps me troubleshoot fuel related problems
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