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Petcock gaskets #678233 12/18/16 9:03 pm
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Andrew Dunham Offline OP
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Hi guys, looking for some input on petcock gaskets for my 69' 441VS. I'm having it painted currently and want to be able to put it back on when it arrives.

I understand the 3 part numbers listed in the manual are for different thickness gaskets; and to use whichever makes the petcock line up properly.

I ran across someone who said they like to use "Stat-O-Seal" washers (rubber o-ring meshed inside an aluminum washer instead. Anyone done this? I like the idea of it, but not sure how well it would work.

Here is a link to the washers: http://www.jegs.com/p/Earls/Earls-Stat-O-Seal-Sealing-Washers/1538544/10002/-1


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
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Re: Petcock gaskets [Re: Andrew Dunham] #678237 12/18/16 10:01 pm
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Mr Mike Offline
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The work like a jewel. Don't know if they will get the petcock pointing in the right direction.

Mr Mike

Re: Petcock gaskets [Re: Mr Mike] #678247 12/19/16 12:51 am
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Mark Z Offline
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Originally Posted by Mr Mike
The work like a jewel. Don't know if they will get the petcock pointing in the right direction.

Mr Mike


One solution there is to use aftermarket petcocks that have a nut that tightens against the gasket/washer, that is, if you're not stuck on originality.



Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: Petcock gaskets [Re: Mark Z] #678248 12/19/16 1:44 am
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Andrew Dunham Offline OP
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I'm not necessarily stuck on originality; just want to spend as little as possible for the time being.

I think I'll give the washer a shot and see how far off it is. I suppose I could stack a couple of them, too.


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678255 12/19/16 5:01 am
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DoubleDiamond Offline
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I use plumbers white PTFE tape wrapped round the threads. Works without leaks and you can set the petcock so it faces the right way too.


BSA: '71 B175; '68 B25; '71 A65; '71 A75
Triumph: '87 T140; '72 T150v
Re: Petcock gaskets [Re: Andrew Dunham] #678260 12/19/16 6:00 am
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kommando Offline
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The stat o seals have a wide range of turn where they seal so you should be able to set the tap in the correct position or if not add some shims but at the risk of adding a leak, I use a copper clad rubber seal which does a similar seal but use a 1/2 width nut to set the tap position.

Re: Petcock gaskets [Re: Andrew Dunham] #678278 12/19/16 9:15 am
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Stuart Offline
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Hi Andrew,

Originally Posted by Andrew Dunham
petcock gaskets for my 69' 441VS.
I understand the 3 part numbers listed in the manual are for different thickness gaskets;

confused Not in the '69 B44 parts book I'm looking at - 00-5706?

Originally Posted by Andrew Dunham
and to use whichever makes the petcock line up properly.

Not according to the parts listed on 00-5706 pages 52/53:-

. The two taps - 82-4971/2 - are the same separate main and reserve lever taps listed certainly for 'glass twin tanks, and also used on contemporary Triumphs; each has a separate locknut so it can be positioned as desired on the tank and then locked in position.

. The 70-7351"Petrol tap seal" on each tap is the Stat-O-Seal that "someone you ran across likes to use"; smile btw, Stat-O-Seals must be positioned against the tank, never against the tap locknut.

. The 83-0002 on each tap isn't a "seal" but a plain plated steel washer that must be between each Stat-O-Seal and tap locknut.

. Reason is the "Seal" in the centre of the Stat-O-Seal is thicker than the surrounding metal washer; anything turning against it will simply rip the seal. frown So you put the plain washer between the Stat-O-Seal and tap locknut, the Stat-O-Seal is then simply sandwiched between the plain washer and the tank. :bigt

Originally Posted by kommando
The stat o seals have a wide range of turn where they seal

confused

Originally Posted by kommando
so you should be able to set the tap in the correct position or if not add some shims but at the risk of adding a leak,

confused Listed taps have separate locknuts?

Originally Posted by kommando
I use a copper clad rubber seal which does a similar seal

Mmmm ... ime, the copper can scratch the tank when the tap locknut's turned, specifically not a problem with the Stat-O-Seal.

Originally Posted by Andrew Dunham

Stat-O-Seals are common-as; put "stat o seal" into any internet search engine and it'll return dozens of links.

Btw, "C.B.S.", if you read this, a Stat-O-Seal isn't a "Dowty", they're something completely different, having a completely different function. wink

Hth.

Regards,

Re: Petcock gaskets [Re: Stuart] #678283 12/19/16 10:47 am
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Andrew Dunham Offline OP
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Hi Stuart, thanks for the detailed reply!

I'm referencing the parts book here: http://www.bsaunitsingles.com/Archives/Spares/BSA%2000-5146%201969%20B44%20Victor%20x.pdf

It is Catalog Number: 00-5146. Number "00-5706" is actually the Shooting Star parts book for 1969. Apparently they're not the same!

Page 46 has item number 46 listed as, "Seal washer, for petrol tap."

It has that item number 46 listed 3 separate times, with the following numbers:

82-9204
65-8218
65-8219

I believe this to be correct as my current petcock has three washers on it.


Great tips on the placement of plain washers to not tear the Stat-O-Seal washers. I could see myself being pleased with the job and then watching that first stream of fuel leak down and wishing I hadn't ripped it!


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678285 12/19/16 11:08 am
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Alloy tank?? red Loctite aim the out let where you want let set overnite or my 69 B-44VS I have a brass 1/4 pipe ball valve with a 1/4 to 3/8 pipe adaptor red loctited together with a 90 degree 1/4 pipe 5/16 barb fuel line inline Russell filter hooked to a 30 mm kuni round slide. Same set up on my 64 Hornet except blue Loctite in the fiberglass tank bung. Running that more than 10 yrs. ball valves don't frik'n leak

Re: Petcock gaskets [Re: Andrew Dunham] #678300 12/19/16 1:17 pm
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Stuart Offline
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Hi Andrew,

Originally Posted by Andrew Dunham
I'm referencing the parts book here: http://www.bsaunitsingles.com/Archives/Spares/BSA%2000-5146%201969%20B44%20Victor%20x.pdf
It is Catalog Number: 00-5146. Number "00-5706" is actually the Shooting Star parts book for 1969.
Page 46

Ooops! blush

This is a 3/8"BSP thread tap - the thread is is about 5/8" OD? If so, bear in mind that the 70-7351 Stat-O-Seal and 83-0002 plain washer won't fit, they're sized for 1/4"BSP (about 1/2" OD).

Entering "bsa 68-8024" into Google returns images all showing a thin separate locknut? If that's the case on your bike's tap, can't see why a Stat-O-Seal and plain washer wouldn't still work, they'd just need a larger OD. As well as 3/8"BSP being about 5/8" OD, it's also between 16 mm. and 17 mm. so, if an actual 3/8"BSP Stat-O-Seal isn't available, any of 3/8"NP (National Pipe), 5/8", M16 or M17 Stat-O-Seals should work, along with corresponding plain steel washers. As you're in US, aiui the usual suggested supplier is McMaster Carr?

Hth.

Regards,

Re: Petcock gaskets [Re: Stuart] #678484 12/20/16 10:40 pm
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Andrew Dunham Offline OP
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Yes, either McMaster Carr or sometimes "Jegs" will carry them.

I can check a local Jegs tomorrow.

Don't you just love how many measuring standards we have? It's always fun figuring out what exactly you need!


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678549 12/21/16 6:02 pm
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joe a. Offline
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copper/seal ring work very well and wide adjustment range IF the diameter is what you require... ... note; some of the aluminum sealing rings are poorly made so watch where you purchase if you go that route.


http://www.classicenglishmotorcycle...ton-triumph-motorcycles-70-7351-83-0002/

joe

Re: Petcock gaskets [Re: joe a.] #678580 12/22/16 12:24 am
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Andrew Dunham Offline OP
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Joe,

Do you happen to know the ID of these? I don't see it listed on the website.


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678614 12/22/16 11:04 am
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kurt fischer Offline
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Originally Posted by Andrew Dunham
... just want to spend as little as possible for the time being.


Sounds like me. Usually ends up costing me a whole lot more than if I'd gotten the right stuff in the first place.


Kurt

-- Don't believe everything you think.
Re: Petcock gaskets [Re: Andrew Dunham] #678767 12/23/16 9:58 pm
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Andrew Dunham Offline OP
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Just thought I would update everyone. Finally got around to measuring the thread size on my petcock and it read .651" or 16.54mm.

I don't believe the Earls sealing washers come in the nearest sizes (11/16") and McMaster Carr doesn't stock that size either. Leaning towards fitting the standard parts.


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678793 12/24/16 11:22 am
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Stuart Offline
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Hi Andrew,

Originally Posted by Andrew Dunham
measuring the thread size on my petcock and it read .651" or 16.54mm.
McMaster Carr doesn't stock that size either.

Errrm ... https://www.mcmaster.com/#stat-o-seal-washers/=15lwvfe:-

High-Pressure-Rated Metal-Bonded Sealing Washers
Size ID
5/8" 0.615"
(i.e. 4/100" smaller than your petcocks' threads)

Metric High-Pressure-Rated Metal-Bonded Sealing Washers
Size ID
M16 15.7
(i.e. 0.76 mm. smaller than your petcocks' threads)

... risking stating the obvious, the operative part of "Stat-O-Seal" is "Seal", so you hardly want clearance from the thread, as you would get with a normal (or fibre) washer?

Hth.

Regards,

Re: Petcock gaskets [Re: Stuart] #678844 12/24/16 11:05 pm
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Andrew Dunham Offline OP
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Ha, yes you are correct, I do not want clearance.

I suppose I could give the 5/8" a shot, but I don't like the idea of the seal being a smaller diameter than the threads, even if it is such a small amount.

I'm afraid a tear or some kind of issue would prevent the seal from doing its job.

Believe it or not, the factory washers are very, very tight on the petcock. I'll measure the ID of those tomorrow.


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #678853 12/25/16 5:27 am
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Stuart Offline
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Hi Andrew,

Originally Posted by Andrew Dunham
I don't like the idea of the seal being a smaller diameter than the threads,

Bear in mind it's only smaller than the major diameter of the thread; the minor diameter of 3/8"BSP is .067"/1.7 mm. smaller, so the ID of either a 5/8" or M16 Stat-O-Seal will simply deform into each thread.

Originally Posted by Andrew Dunham
I'm afraid a tear or some kind of issue would prevent the seal from doing its job.

With respect, you really are over-thinking something very, very simple.

Originally Posted by Andrew Dunham
Believe it or not, the factory washers are very, very tight on the petcock.

Believe it or not, "the factory" has not existed for 44 years. Whether or not the next lot of fibre washers you buy are "tight" depends how much retailer and wholesaler care about something they make an infinitesimal profit on.

I've used standard off-the-shelf 1/2" and M12 Stat-O-Seals on 1/4"BSP fuel tap threads without any issues whatsoever.

Hth.

Regards,

Re: Petcock gaskets [Re: Andrew Dunham] #678945 12/26/16 10:59 am
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Mike Carter R.I.P. Offline
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Stuart is correct we have used these sealing washers for years with no problems installed correctly with proper washer.

Cheers man

Mike Carter

Re: Petcock gaskets [Re: Andrew Dunham] #678992 12/26/16 9:39 pm
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Andrew Dunham Offline OP
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Alright, I'm convinced. I'll give them a go. Thanks for the vote of confidence, Mike.

Thank you Stuart for your patience and knowledge. Sorry I was being a bit thick!


1961 BSA Super Rocket
1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
Re: Petcock gaskets [Re: Andrew Dunham] #679061 12/27/16 7:21 pm
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Stuart Offline
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Hi Andrew,

Originally Posted by Andrew Dunham
Sorry I was being a bit thick!

smile Not at all, I just wanted to be sure you had all the facts. Some of the 'solutions' foisted on owners were half-arsed when they were new, never mind half-a-century of technical progress later.

Regards,

Re: Petcock gaskets [Re: Andrew Dunham] #679101 12/28/16 9:44 am
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I APOLOGIZE FOR THE USE OF CAPS. I CAN ONLY TYPE WITH MY RIGHT HAND SO USING THE SHIFT KEY IS BEYOND MY CAPABILITES.

The Devil is in the details.

1957 BSA A10 Spitfire Scrambler (numbers matching, very correct, very nice condition)
1965 BSA A65 Lightning Rocket "Clubman" (restored)
1966 BSA A65 Spitfire MK-II (restored)
1967 BSA A65 West Coast Hornet (under restoration)
1975 Norton Commando Roadster (2100 miles)
2001 Kawasaki W650

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