The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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PostPosted: Mon Nov 04, 2019 4:05 am 
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Joined: Sun Aug 14, 2011 2:47 am
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Location: NSW. Australia
Several months ago, while I was still a member, I bought a set of the clubs alloy carburettor mounts for my SPRINT.
I'm now about to fit them and I was wondering what sort of tension I need to put on them considering the 'O' rings?
I expect that they can be over tensioned?
Any tips?.
Thanks & Cheers,
Rob

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"When everything seems to be going against you, remember that the airplane takes off against the wind, not with it". HENRY FORD
1915 Ford "T" Speedster (Evangeline), 1921 Ford "T" Tourer (Anastasia), 1955 Zephyr 6 (Purdey), 1975 Dolomite SPRINT (Daisy), & a couple of moderns.


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PostPosted: Wed Nov 06, 2019 9:32 pm 
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Just fitted the club ones to my Sprint - the rubber ones were badly split and leaking air making it impossible to set the carbs up properly. I tightened them right up so that there was no gap. Must admit I didn't use a torque wrench I just did the bolts (mount to manifold) and nuts (carb to mount) up evenly in stages to ensure the gap closed up in a parallel fashion. You can "feel" when contact is made between the mounting faces. I guesstimate the torque to be around 15 to 20 ftlbs.

Make sure you get the throttle linkage connecting bar back in the right way round otherwise you will have to take the carbs off again to turn it over as it was 180 deg out! (Don't ask! caused a bit of head scratching followed by some cursing)

Roger

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1971 Stag Auto White

Too many cars, too little time!


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PostPosted: Thu Nov 07, 2019 12:36 am 
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Location: NSW. Australia
Thanks for answering Roger.
The reason I asked was that I'm fearful of over tensioning them and splitting the 'O' ring.
I guess with a coating of a suitable rubber grease and being gentle, it should be OK.
Thanks again,
Rob

_________________
"When everything seems to be going against you, remember that the airplane takes off against the wind, not with it". HENRY FORD
1915 Ford "T" Speedster (Evangeline), 1921 Ford "T" Tourer (Anastasia), 1955 Zephyr 6 (Purdey), 1975 Dolomite SPRINT (Daisy), & a couple of moderns.


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PostPosted: Thu Nov 07, 2019 9:53 am 
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Location: Nr Kenilworth
O ring grooves should be sized so that they push into the groove under tension when completely flat. Treat then as if there was just a metal to metal fit so the bolts are tight.

Tony

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PostPosted: Thu Nov 07, 2019 10:16 am 
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Joined: Sun Aug 14, 2011 2:47 am
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Location: NSW. Australia
Quote:
O ring grooves should be sized so that they push into the groove under tension when completely flat. Treat then as if there was just a metal to metal fit so the bolts are tight.
Tony
Thanks again Tony,
Rob

_________________
"When everything seems to be going against you, remember that the airplane takes off against the wind, not with it". HENRY FORD
1915 Ford "T" Speedster (Evangeline), 1921 Ford "T" Tourer (Anastasia), 1955 Zephyr 6 (Purdey), 1975 Dolomite SPRINT (Daisy), & a couple of moderns.


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PostPosted: Thu Nov 07, 2019 10:28 am 
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Quote:
O ring grooves should be sized so that they push into the groove under tension when completely flat. Treat then as if there was just a metal to metal fit so the bolts are tight.

Tony
Absolutely right, and those in the club alloy mounts do. As I said just make sure that everything is tightened evenly to ensure a nice even compression all the way round and no pinching or bunching of the 'o' rings.

Roger

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1975 Sprint Man O/D in Honeysuckle Yellow
1971 Stag Auto White

Too many cars, too little time!


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