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Fuel pump crush washer
Posted: Mon Jul 26, 2021 17:45
by LotusMonkey
Hi Folks. Getting ready to install a new fuel pump to a 90 Excel SE. I have noticed that there is a crush washer on the output feed, before the reducing bush, and I am assuming I need to replace that with the new pump(?) I cannot see the part on SJ so am wondering where I can get one, or is it safe to re-use what I have? Naturally all thread joints will also be PTFE'd.
Thanks,
Duncs
Re: Fuel pump crush washer
Posted: Mon Jul 26, 2021 21:29
by Pete Boole
It's a while since I dismantled the fuel pump - do you mean the olive and the gland nut? I don't remember any crush washers - do you have a photo? I don't remember any pipe threads to seal either, so no need for PTFE tape - risk of bits breaking off and disabling the needle valves in the carbs.
Pete
Re: Fuel pump crush washer
Posted: Mon Jul 26, 2021 21:59
by LotusMonkey
The fuel pump assembly is laid out the same way as in page 44.03 of the service manual. There is a crush washer (item 30) that sites between the reducing bush and the pump at the pump's outlet that goes on to the filter and on to the non-return valve and carbs. I don't have a photo of the assembly, but it is the same as in 44.03 below:
Re: Fuel pump crush washer
Posted: Tue Jul 27, 2021 17:57
by Pete Boole
You'll almost certainly be able to use the copper washer (30) again - if not you'll be able to buy new from Think Automotive, or maybe a local plumber's merchant, or fleabay. I'll see if I can find my old pump to look at the size - I may have one in the drawer you can have.
Pete
Re: Fuel pump crush washer
Posted: Tue Jul 27, 2021 18:20
by Pete Boole
Hi Duncs - found my old pump! Last seen around 16 years ago!! I was wrong about the PTFE tape - the reducing bush is wrapped in it. I'd forgotten what a grim setup it is to get the fitting pointing in the correct direction - I hate to see these sort of things on fuel lines. I've also got a couple of folded copper washers - if you pm me your address (and surname) I'll stick them in the post
Pete
Re: Fuel pump crush washer
Posted: Tue Jul 27, 2021 18:47
by LotusMonkey
Pete Boole wrote: ↑Tue Jul 27, 2021 18:20
Hi Duncs - found my old pump! Last seen around 16 years ago!! I was wrong about the PTFE tape - the reducing bush is wrapped in it. I'd forgotten what a grim setup it is to get the fitting pointing in the correct direction - I hate to see these sort of things on fuel lines. I've also got a couple of folded copper washers - if you pm me your address (and surname) I'll stick them in the post
Pete
That is extremely kind of you. I can see my "people I owe a pint to" list growing for when the car is able to make it to an event! Will PM now
Re: Fuel pump crush washer
Posted: Tue Jul 27, 2021 21:31
by Pete Boole
Are PMs working OK?
Pete
Re: Fuel pump crush washer
Posted: Wed Jul 28, 2021 06:01
by Excel SA
PM's are working, sort of, sometimes you have to "send it" twice - just check it goes into the "outbox".
Neil.
Re: Fuel pump crush washer
Posted: Wed Jul 28, 2021 13:02
by KevW
I wouldn't use PTFE in this application. When I fitted a replacement pump to my Excel I considered using PTFE on the joints but first tried dropping a piece of tape into a cup of petrol. I found petrol dissolved the PTFE
Re: Fuel pump crush washer
Posted: Wed Jul 28, 2021 16:33
by LotusMonkey
Thanks for your input everyone - all useful stuff.
Re: Fuel pump crush washer
Posted: Wed Jul 28, 2021 18:39
by Johnwindwood
My bet is that this is a standard copper washer rather than a crush washer. If so, and it is not badly damaged, you can re-anneal it for further use. Heat it to cherry red with a blowtorch and then quench in cold water. This restores it's original properties and it will act like new.