 What size fuel hose?, From rear firewall up to engine shelf |
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| boxsterfan |
 Oct 19 2013, 02:11 PM
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#1
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914's are kewl  Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California  |
My 1974 2.0L has SS fuel lines all the way back through the tunnel.
I have a leaking fuel line where it connects to the SS pieces going through the engine shelf. I was able to remove the leaking hose (has a crack near the end) and of course is a good idea to replace them anyways. What size is the hose supposed to be? Inner diameter? I thought it was 8mm but I am just unable to get that hose on there. Any tips for getting fuel hoses back on to SS lines? |
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| SLITS |
Oct 19 2013, 03:18 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
SS is going to be 3/8" (9.5mm).
They used to be paired as 3/8"(9.5mm) supply and 5/16"(7.9mm) return. If they are the same size, they are probably 5/16". |
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| TheCabinetmaker |
Oct 19 2013, 03:57 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
If it's 5/16 hard line, then 8mm should fit with a little lube and a bit of force
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| boxsterfan |
Oct 19 2013, 10:13 PM
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#4
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
Ended up being a 9.5MM (3/8"). No leaks now. Phew!!!
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| Cap'n Krusty |
Oct 19 2013, 10:38 PM
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#5
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
If it is 3/8, then you'll need the Porsche supplied adapter hose to step it down to 7.5mm at the fuel rail if you have FI. Clamping 3/8 hose down to 8mm is commonly known as a "fire starter" in the trade.
The Cap'n |
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| JawjaPorsche |
Oct 20 2013, 07:07 AM
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#6
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Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Double post, sorry! (IMG:style_emoticons/default/smile.gif)
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| JawjaPorsche |
Oct 20 2013, 07:07 AM
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#7
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Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
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| boxsterfan |
Oct 21 2013, 01:46 PM
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#8
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
QUOTE(JawjaPorsche @ Oct 20 2013, 06:07 AM)  I ended up using the 3/8" fuel hose with two (2) hose clamps on each end. On the end coming out of the firewall (9.5mm SS tube is my guess), the 3/8" fuel hose fit well and was clamped with two hose clamps. On the end that meets the SS tube going up through the engine bay (8mm SS tube from what I read here), I attached the 3/8" fuel hose but utilized two (2) smaller hose clamps that just barely fit around the 3/8" hose and was able to clamp it down tight. The first time I tried with the same size clamps as I utilized at the firewall connection and I got leakage everywhere (ala fire starter). As of now, it sounds like I should get the 9.5mm to 8mm step-down tube as it comes out of the firewall/tunnel? The fun never ends... |
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