Routing fuel lines - which order for solenoid, filter, pump + which filter?

This is a follow up to my previous post on routing my fuel lines : https://thelatebay.com/index.php?th...ocation-and-fuel-hose-run.94052/#post-1839729

Can I just check .. the order should be: Fuel tank -> cut-off solenoid -> in-line filter -> pump -> regulator -> carbs?

Also .. in that order, the in-line fuel filter is below the bus. This seems a bit exposed and the plastic ones don't look that robust. Is there a recommended metal canned in-line fuel filter for mounting below the bus?

 

My solenoid failed because (I believe) I did not have a filter before it. I have now deleted it again.

I would go filter, solenoid, pump. My filter isn't exposed at all, it's tucked away nicely in line with the pump.

I don't have a regulator, but that would go after the pump.

My filter is a standard generic plastic filter, the pump is a carter rotary, and the carbs are twin solex.

Hope that helps.

Jim

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Get a metal fuel filter... Why wouldn't you?

Got to be safer.

 

^^^ this, the way I done it on a couple of Bus is filter, then solenoid, then pump.


Plastic filter is fine outside the engine bay and can be visually inspected at service time to see if it needs changing.

 

Interesting post as I was going to put the cut off solenoid first. My logic was that if a filter breaks (not that I've heard that this is a thing) then I can isolate the fuel leak.

 

The filter also acts as a handy increaser from the ~6mm tank outlet to ~8mm fuel line.

 

Yeah, agreed, that was my theory too initially. Then, when the solenoid failed (which took months to track down as it was a partial fail), i also realised I've never experienced a failed filter.

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Queue @snotty with his excellent under tank photo

 

Mine is plastic filter, metal filter, pump, filter regulator, carbs. None of the filters ever catch anything.

 

Interesting comment. I've fitted a cut off solenoid too. My main motivation has been to try and track down whether I've got a steady tiny drip somewhere, so I've had my fuel pump(s) off and my carbs apart umpteen times. I initially fitted the filter upstream of the cut off, but then I couldn't easily see it, so it's now downstream, ahead of the pump. I've never had sediment in it on this bus, but if I ever need to change it I reasoned it's much easier this way than having to clamp the pipe off each time.
Having a clear filter is useful and it's what enabled me to detect a blocked tank on a previous bus.

 

Out of interest, does anyone fit a stopcock directly after the tank outlet? Wouldn't it make changing the filter a lot easier?

 

The solenoid when powered off is a stop cock, isn't it?

 

I considered it. Then realised its another thing that could possibly leak or fail, and a line clamp is just as easy easy.

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Stop cock

 

I use filter -solenoid - firewall - mechanical pump on my 1641.

You should have seen the crispy coil on my shutoff solenoid and crispy rubber fuel hose after some of the petrol ran down the engine and burnt under the bus too.. I was glad I had a metal filter..

My blocked up metal bodied filter showed very little sign of blockage, when I sliced it open, apart from a slightly darker tint to the paper. It wouldnt have shown on a yellowish plastic filter.

 

I use a proper clamp for squeezing the fuel hose to shut off the flow. A stop cock would help but on the other hand thats yet another connection to crack and fall off..

 

After a fashion yes but it has been mentioned that they can malfunction with dirt in them if placed before the filter.

 

I knew it!

 

Great discussion folks. Thank you. I can see all of the pros and cons now.

Which metal filter do people use? Link?

I do like the idea of keeping the solenoid first in line after the tank .. after all, its job is to isolate the system if it all goes bad.

Then filter to protect the pump and carbs.

 

I use https://www.lsengineers.co.uk/diesel-petrol-inline-filter-metal-type-medium.html also available with 6mm tails https://www.lsengineers.co.uk/diesel-petrol-inline-filter-metal-type-small.html

Filter to (rotary) pump to (Weber IDF) carbs – no cut-off valve and no regulator. Every unnecessary joint is a potential leak.