Fuel filter casing removal

Technical advice Q&A

Topic author
Ian Cooke
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Joined: Wed Oct 17, 2012 6:30 pm
Location: Hampshire
Great Britain

#1 Fuel filter casing removal

Post by Ian Cooke » Sat May 09, 2020 12:46 pm

Hi All

I tried to remove the fuel filter bowl casing from my series 2 and when I removed the glass bowl before disconnecting the pipes I had a continuous flow of petrol coming out of the hole which the filter sits up against. Is this just the fuel from the carbs flowing back and will it stop after a while or do I need to put some sort of temporary "bung" in the hole?

Also, when I reconnect everything will I need to bleed the system?

Ian
Ian Cooke
1969 S2 FHC in Old English White

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Tom W
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#2 Re: Fuel filter casing removal

Post by Tom W » Sat May 09, 2020 12:57 pm

The fuel won’t drain back from the carb float chambers. The needle valves are on the top of the float chambers. The fuel is probably coming from the lines to the carburettors. It should stop eventually, but it won’t harm to use a clean bung.

You won’t need to manually bleed the system afterwards. The electric fuel pump will purge all the air through when you turn the ignition on. Just wait a little longer than normal between switching the ignition on and trying to start the car. Once the fuel pump has stopped ticking, you should be good to go.
Tom
1970 S2 FHC

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Topic author
Ian Cooke
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#3 Re: Fuel filter casing removal

Post by Ian Cooke » Sat May 09, 2020 3:56 pm

Thanks Tom that's great.

All done.
Ian Cooke
1969 S2 FHC in Old English White

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Ian Cooke
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Location: Hampshire
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#4 Re: Fuel filter casing removal

Post by Ian Cooke » Sat May 16, 2020 4:40 pm

Some further advice please.

I have refitted the fuel filter but now have a persistent weep of petrol from the washer nearest the filter casting where the fuel feed pipe joins the casting. I have tightened the banjo as much as I dare and dont want to risk over tightening it.

Should I have replaced the washers with new fibre ones? The existing ones are aluminium.

Thanks

Ian
Ian Cooke
1969 S2 FHC in Old English White

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Tom W
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#5 Re: Fuel filter casing removal

Post by Tom W » Sat May 16, 2020 6:16 pm

The existing washers might have work hardened. Also check there’s no nicks or scratches on either the washers, or their mating faces.
Tom
1970 S2 FHC

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Ian Cooke
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#6 Re: Fuel filter casing removal

Post by Ian Cooke » Tue May 19, 2020 7:12 pm

Thanks Tom

I've ordered replacement washers and hopefully they will do the trick.

Ian
Ian Cooke
1969 S2 FHC in Old English White

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