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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 08:56
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Ok i have heard two different stories about this, and having no experience helps me in no way at all.
Basically a couple of the threaded fittings in my surge tank are dribbling a little bit of fuel. I had thought that being tapered threads this wouldnt be a problem - but obviously it is.
What do people usually use for this?
I have included a pic of the setup so you can get an idea of how things are working here.
The parts circled in green is where fuel is dribbling. The blue fitting on the bosch pump i think is leaking due to the hose clamp biting into the rubber too much (whoops). Of course everything is hose clamped nicely and connected up properly since that picture, havent taken a newer one yet 
Damn it sux when shit goes wrong.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 08:58
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another thought - might this also be due to the use of barbed fittings? I hope not cos then two different guys, one from a reputable shop with experience in this work and another from Speedflow fittings, have recommended barbed fittings....
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Location:
Brisbane
Registered:
October 2002
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 09:34
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r u using proper EFI hose clamps, they resist pinching much better
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Location:
Canberra
Registered:
May 2002
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 10:29
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Definately use thread tape on the barbed fittings.. Tapered thread isnt quite good enough to seal on its own in all cases.
Phil
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 11:05
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cheers Phil(s). I'll grab myself some thread tape while im getting the exhaust done tomorrow morning. Hopefully then i can drive it around and HEAR whats happening.
I dunno what kind of hose clamps i got - i just asked the dude for a shitload of hose clamps, and he knew exactly what i was doing with the whole EFI fuel thingy.
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Location:
adelaide
Registered:
April 2003
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 12:02
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efi clamps cost a bit more than normal ones, they also have a little tab that covers the thread on the clamp so it wont pinch the rubber. if these dont work you could get the clamps with the bolt that tightens them but they are about $5 a pop
also i am pretty sure on my carter pre pump it says to never use thread tape on the fittings...
ab
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Location:
1st street on the right
Registered:
November 2002
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Location:
adelaide
Registered:
April 2003
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 12:20
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ps witzl i should have mentioned get in touch with dale at www.braidedlines.com - he is in castle hill too and can supply you with speedflow fittings which wont leak at a very good price (per the above post!)
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 15:01
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if they are NPT tapered threads, they are not designed to seal without tape. you might be able to get away with threadlocker if it is fuel resistant, but teflon tape would be a good way to start.... there are at least two types of thread tape too.. water and gas. the gas is thicker and usually yellow (or pink?) and water is white... maybe go the gas tape so you can stuff it in there....
as for clamps, get the ones with bolts, not the ones with slots, as the slots cut the rubber...
i can bring some out for ya and give you a hand soonish.. gotta pick up that piston and other things from you, and drop off bits to Michael....
Cya, Stewart
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Surge tank fittings leaking - thread tape?
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Sun, 09 November 2003 21:44
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In boot - too difficult and hoses all over the shop.
Under diff - Not enough room (diff comes too close for comfort.
This is just easier for me. If i want to change i can always do that later.
Re. Speedflow fittings - on the outlet of the HP pump you'll notice the anodised blue fittings, these are the speedflow type. But like i said that one is leaking due to the clamp pinching the hose. I'm going down the industrial centre today to get my exhaust done, i'll pay a visit to the mentioned place cos the Speedflow supplier i used is in Seven Hills.
I'll let you know how i go today after i get the exhaust done. Thats the major concern right now.
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Location:
Perth
Registered:
May 2003
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 01:23
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isnt it silly to have a surge tank in the engine bay?
if one of them hoses does spring a leak when your fangin it i hope you have a fire extinguisher 
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 03:39
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it would be the same anywhere in the car buddy, only the engine bay has higher temperatures. Plus there are new ADR's disallowing the use of fuel cells (surge tanks) in the boot unless completely sealed off.
twas also a turd trying to get all the stuff in the boot to begin with.
Now i have answers!!
Thread tape is bad. Fuel dissolves it apparently. I bought what both Stewart and the Speedflow guys at Seven Hills recommended, which is a Teflon type of "lock tight". It is unaffected by fuel and seals threads good, and is designed for what i need.
I also got a pair of the EFI type hose clamps which have bevelled edges to avoid pinching the hose, and were only $2- each.
P.S. The www.braidedlines.com guy works at Castle Hill Exhaust centre... Which is where my exhaust was done today!
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Location:
Perth
Registered:
May 2003
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 03:57
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cool i was just wondering dont want a flame grilled witzl now do we
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 08:30
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witz, is it a tape or a paste?
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Location:
Canberra
Registered:
May 2002
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 10:45
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| Quote: |
isnt it silly to have a surge tank in the engine bay?
if one of them hoses does spring a leak when your fangin it i hope you have a fire extinguisher
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What's the difference between a hose to a surge tank, and a hose direct to the fuel rail? Either one is capable of spraying large amounts of fuel all over the engine if it leaks.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Surge tank fittings leaking - thread tape?
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Mon, 10 November 2003 12:16
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My point exactly!
Grega - its a paste. The EXACT name is "Loctite 567 - Thread Sealant"
They call it a master pipe sealant, with teflon. Part no. 56747.
The shit was expensive at like $25 a 50mL tube, but worth it i spose.
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