Fuel Line Replacement

[rgsSpider]

I'd like to go ahead and replace the rubber fuel lines. 1980 carbed engine. I've been looking around for a picture or something to show me where they are and what size to use. Best thing I could find was on Rimmers site but they don't list sizes:



Could someone tell me, using the numbers in the drawing, which ones are 1/4" and which are 5/16"? And how much of each should I purchase? Are there any surprises I should be prepared for?

Thanks,

Randy

1980 TR7 <font color="red">Spider!</font id="red">
http://rgstr7spider.tumblr.com/

[Hasbeen]

Hi Randy. My car has SUs but I think they all use the same fuel hose. Mine takes 5/16 everywhere.

There are a couple of nasty traps with fuel hose here in Oz, which probably apply to you as well.

I replaced my hoses a few years back. I bought "Gates" fuel hose as it has always had a great reputation. In just over 12 months the hose to the fuel pump split radially, & over 20 liters of fuel ran on to the floor, damaging the rubber of the front tyres where it pooled before evaporating. The car had been in the shed for about a week, so I don't know how quickly it happened.

I don't use any fuel with ethanol in it, but somewhere may have sold me the stuff to pinch a buck. Only quality hose will handle ethanol.

A friend suggested I use injection hose, which should be better quality. I did, & luckily the hose I bought was stamped "made in USA". It is still crack free & flexible some years later.

More recently my son fitted new hydraulic hose to the gearbox oil cooler on the 8. It burst after 23 kilometers.

I asked a mate who builds drag racing transmission, who said NEVER USE ANY HOSE NOT STAMPED MADE IN USA. Most other hoses, even with good makers names on them, are from China or Mexico, & are junk.

Hope this helps.

Hasbeen

[rgsSpider]

That's a first! Better quality made in America! Probably because its got to stand up to ethanol. Living near the coast it's easy to find ethanol free gas, but in some cities it's illegal to sell ethanol free...thank you US govmnt. So 5/16, and I'm better off getting hose rated for FI? I'd rather spend the money for overkill when it comes to something like this.

Randy

1980 TR7 <font color="red">Spider!</font id="red">
http://rgstr7spider.tumblr.com/

[Workshop Help]

Dear friend, Randy, there are two short pieces of 1/4" hoses used on the TR7 fuel system using the Z-S carburetors. They are each under 3" in length and are the illustrated Pt # 145735. They connect the fuel manifold line to the spigots on the side of the carburetors. They also are used to connect the ventilation manifold line to the float bowls. As our Australian friend indicates, all else is 5/16".

I recommend you step & fetch a longish length of hose at your favorite auto parts store and cut to fit with a sharp knife. Buy enough so an extra 18" is left over. This last piece can be used to listen the intake hiss of your carburetors to balance their synchronization.

The sticking the hose in your ear is a time honored facet of English Sports Car Ownership. This is where the expression 'tuneup' originated. As you listen to the intake hiss and tweak the idle speed screws to balance the air flow, you are, in effect, tuning the hissing carburetors to match each other.

Yes, I know at first it all sounds bizarre and slightly perverse, but no one ever said our TR7's were for the faint of heart.

Mildred Hargis

[john 215]

Hi,

We have the same problem over here, I picked up a real of petrol hose's in 1/4", 5/16 " and 3/8" ( for the V8 which I installed larger pipes ) and reckon on checking and changing as nec.

Goodyear sell Ethanol resistant hose but at a guess not cheap -

http://www.goodyearep.com/ProductsDetail.aspx?id=6082

BUT they say resitant and not PROOF !!

Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[TR Tony]

Well I need to replace the fuel hoses on my 7 so I asked this same question about hose size a few weeks ago & got no reply!

You need to look for SAE30 R9 grade hose for use with "biofuels" i.e. ethanol. Almost certainly if you buy R9 hose it will be rated for use with EFI so should cope with our carb fuel pumps[:)]

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

[rgsSpider]

Great advice, thanks everyone!

Randy

1980 TR7 <font color="red">Spider!</font id="red">
http://rgstr7spider.tumblr.com/

[FI Spyder]

There are two types of FI fuel hose. The regular stuff rated at 50 lbs. for older FI types like ours that has the 50 lb. pump but regulates it down to 34 lbs. and the more modern type which is rated at, I believe, 240 lbs. for the direct injection types found in today's cars I suspect. The latter is really expensive and would be money wasted. I don't know about your area but here there is ethanol in most gas but some are ethanol free like Shell high test, Chevron high test and Co-op all grades. A Google search in your area might bring up those stations/grades that are alcohol free but it would be better/cheaper to get a quality hose like the lower pressure FI hose which doesn't cost that much.

- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

[HDRider]

Don't forget the fuel lines in the vapor recovery system. The one between the tank and the filter behind the access plate in the boot is always bad.

Edward Hamer
Petaluma CA

[rgsSpider]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by HDRider</i>

Don't forget the fuel lines in the vapor recovery system. The one between the tank and the filter behind the access plate in the boot is always bad.

Edward Hamer
Petaluma CA
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

And what a tangled mess that is! I'm guessing US models were the only ones blessed with that?

Randy

1980 TR7 <font color="red">Spider!</font id="red">
http://rgstr7spider.tumblr.com/

[FI Spyder]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by rgsSpider</i>


And what a tangled mess that is! I'm guessing US models were the only ones blessed with that?
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

North American models with our emissions and closed fuel system. In Canada we basically got federal cars although we never got FI in Canada except as an option.

- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

[TR Tony]

SAE 30R7 is rated to 50lbs pressure but is not recommended for ethanol blends - it would be fine if you are able to use only "straight" petrol.

SAE 30R9 is for use with ethanol blends, biodiesel, etc as well as having 180 lb pressure rating for EFI. If you have to use an ethanol blend then this is the one to get.

And if any part of the hose is submerged in fuel, such as part of an "in tank" pump, then SAE R10 is required where the exterior of the hose will not be damaged by the fuel it sits in.

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">