Replacing fuel line, 87 SE

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gusexcel
Junior Poster
Posts: 36
Joined: Tue Sep 17, 2019 19:57
Model: Excel SE
Year: 1987

Re: Replacing fuel line, 87 SE

Post by gusexcel »

So finished the boot plumbing

5] -6AN[JIC] fittings[listed above]
2] 3/8 male BPST to male -6AN adapters https://www.mcmaster.com/4545K552/
1] -6 male to male adapter https://www.mcmaster.com/50695K262/
2]right angle -6male to -6 female swivel fittings [ Earl's Performance Couplers 966303ERL] or
https://www.amazon.com/gp/product/B0752 ... UTF8&psc=1
1] 14mm/9/16/14/BSP banjo to -6AN https://www.amazon.com/gp/product/B07R4 ... UTF8&psc=1
2 banjo washers

The most fun part for last
THe AC fuel filter has some unknown 1/2-20 thread fitting that the hose has a rubber donut on it
I bought two -6AN to 1/2-20 inverted flare fittings and used aluminum crush washers against the body of the filter. One might choose to use a different filter with -6 fittings built in as they are readily available, and it is just a damn fuel filter.

To list in order from tank to shutoff:
banjo/washers
-6 and hose end
-6 hose
-6 hose end
an/bspt adapter
[fuel pump]
an/bspt adapter
-6 hose end
-6 hose
-6 hose end
right angle swivel fitting
1/2-20 inverted flare fitting
crush washer
[fuel filter]
crush washer
1/2-20 inverted flare fitting
right angle swivel fitting
-6 hose end
-6 hose
-6 hose fitting
-6 male to male
[shutoff valve]

It looks like the fuel filter 'in' hose isn't going to fit behind the boot carpet panel, so a banjo fitting might be a better fit, but it is again an odd size for a banjo and I am sick of waiting for parts

I was about 3 feet short of hose from the above listed length, so bought some more from mcmaster

It is also interesting to note that most of the built it yourself or reusable fittings seem to interchange. The aeroflow fittings designed for the nylon over seem to have a tiny bit more clearance around the hose, but nothing that affects use ability, and the pieces with interchange with each other, nuts, ferrules[olives] etc

gusexcel
Junior Poster
Posts: 36
Joined: Tue Sep 17, 2019 19:57
Model: Excel SE
Year: 1987

Re: Replacing fuel line, 87 SE

Post by gusexcel »

And to clarify, while it appears all PTFE fittings are compatible, you cannot mix hose fittings for other types of hose[like rubber]

They are completely different and cannot be used. My local places to not stock PTFE raw hose at all, or fittings for it.

Once you get into the AN/JIC fittings, everything is compatible, so a -6 fitting from one place will always fit a fitting from elsewhere. So you can run PTFE hose without worrying that down the road you want to change something, AN rubber hose ends are the same as AN PTFE hose ends when they connect to each other

gusexcel
Junior Poster
Posts: 36
Joined: Tue Sep 17, 2019 19:57
Model: Excel SE
Year: 1987

Re: Replacing fuel line, 87 SE

Post by gusexcel »

Just as a note. The tank outlet is a 1/4 BSPP bolt with a strainer attached. I had two issues.
One was that the sealing washer was stuck to the bottom of the tank and shouldn't be reused. I knocked it off with a screwdriver, but should have checked more thoroughly. The sealing surface looked as though it had MIG welding splatter on it. and needed to be cleaned up.

This was exacerbated by the fact that no matter what banjo fitting you buy now, it will be a 9/16 or 14mm. [.562 to .552]

This is oversized for the 1/4 BSPP which measures about .518. Manufacturers make up for this with a smaller ID washer. IF you do not have the smaller ID washer, and especially if the sealing surface is not perfect, it will weep.

I bought supposed 1/4 pipe fittings to find out they were 9/16, but at least I got the washers out of the deal.

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