Rubber pipe diameter

TurnipSpeed · Mar 5th, 2015, 14:52

Hi, I want to replace any vacuum/ fuel pipes on my 2.3 LPT 940(1996 model).
Without taking pipes off, has anybody any idea of the internal diameters of the pipes?
In particular the fuel pressure regulator pipe, about 25cm long, which is showing wear at both ends.
The oe Volvo part seems expensive for a short rubber tube.
Thanks for any advice.

Alasdair1 · Mar 5th, 2015, 17:27

I just changed the steel fuel line to the filter and the return. There 8mm outside diameter if its any help. If your replacing rubber fuel lines then they have to be ethanol resistant. I think its SAEJ30R9 High Pressure Line is recommended. There is SAEj30R6 but I think the R9 is high pressure. You can buy it by the metre at most motor factors or online.

Alasdair

crogthomas · Mar 5th, 2015, 20:59

The vacuum hoses are 4mm ID.

TurnipSpeed · Mar 5th, 2015, 22:14

Thanks for the info, especially about the fuel line spec.
I would have just bought silicone rubber tubing in the right size, but just shows how careful you have to be when messing with fuel systems!
Thanks again.
Paul.

baggy798 · Mar 5th, 2015, 23:26

Do you mean this hose and the smaller one attached to the back of the fuel regulator?

I replaced those two with 7.3mm ID R10 fuel hose (100% compatible with m/ethanol):
http://www.ebay.co.uk/itm/100-BIO-Fu...item3a7b9f6d9a

8mm silicone hose for the brake booster (tried 9.5mm ID but it was a bit loose on the plastic check valve).

I use 3mm silicone hose for all the small lines, it has the same wall thickness as 4mm.

TurnipSpeed · Mar 6th, 2015, 10:46

Hi, it is a pipe at the front of the fpr about 1cm thick.
I'll see if I can work out where it goes and get back to you.
Thanks.

Mar 5th, 2015, 14:52	#1
TurnipSpeed TurnipSpeed Last Online: Jul 7th, 2023 15:53 Join Date: Jun 2012 Location: Peterlee	Rubber pipe diameter Hi, I want to replace any vacuum/ fuel pipes on my 2.3 LPT 940(1996 model). Without taking pipes off, has anybody any idea of the internal diameters of the pipes? In particular the fuel pressure regulator pipe, about 25cm long, which is showing wear at both ends. The oe Volvo part seems expensive for a short rubber tube. Thanks for any advice.

Mar 5th, 2015, 23:26	#5
baggy798 🤍💙💗 Last Online: Yesterday 19:08 Join Date: Mar 2006 Location: Lichfield	Do you mean this hose and the smaller one attached to the back of the fuel regulator? I replaced those two with 7.3mm ID R10 fuel hose (100% compatible with m/ethanol): http://www.ebay.co.uk/itm/100-BIO-Fu...item3a7b9f6d9a 8mm silicone hose for the brake booster (tried 9.5mm ID but it was a bit loose on the plastic check valve). I use 3mm silicone hose for all the small lines, it has the same wall thickness as 4mm. __________________ MY97 940 CD LPT Super Sports Edition 2 Turbo, Midnight Purple, 175,000 miles.

Mar 5th, 2015, 17:27	#2
Alasdair1 Master Member Last Online: Jul 19th, 2017 12:38 Join Date: Aug 2010 Location: Inverness	I just changed the steel fuel line to the filter and the return. There 8mm outside diameter if its any help. If your replacing rubber fuel lines then they have to be ethanol resistant. I think its SAEJ30R9 High Pressure Line is recommended. There is SAEj30R6 but I think the R9 is high pressure. You can buy it by the metre at most motor factors or online. Alasdair

Mar 5th, 2015, 20:59	#3
crogthomas Master Member Last Online: May 17th, 2024 15:38 Join Date: Jan 2008 Location: Bracknell, Berkshire, UK	The vacuum hoses are 4mm ID.

Mar 5th, 2015, 22:14	#4
TurnipSpeed TurnipSpeed Last Online: Jul 7th, 2023 15:53 Join Date: Jun 2012 Location: Peterlee	Thanks for the info, especially about the fuel line spec. I would have just bought silicone rubber tubing in the right size, but just shows how careful you have to be when messing with fuel systems! Thanks again. Paul.

Mar 6th, 2015, 10:46	#6
TurnipSpeed TurnipSpeed Last Online: Jul 7th, 2023 15:53 Join Date: Jun 2012 Location: Peterlee	Hi, it is a pipe at the front of the fpr about 1cm thick. I'll see if I can work out where it goes and get back to you. Thanks.

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