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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 Post subject: Carb return spring
PostPosted: Sun Mar 31, 2019 6:04 pm 
TDC Member

Joined: Thu Dec 27, 2018 6:13 am
Posts: 11
Hi all

On my 1500 SE, I have a spring dangling loose between the 2 carbs. I've looked through the parts manuals and think this should be attached to a plate linked to one of the bolts connecting the manifold and down pipe. Does anyone have pictures for this as it doesn't seem to be on my car? (and is this part UKC9193?)

I've just got the car started for the first time and it's revving quite fast and I'm hoping this is a connected issue!



 Post subject: Re: Carb return spring
PostPosted: Mon Apr 08, 2019 8:32 am 
TDC Member
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Joined: Fri Oct 06, 2006 8:57 am
Posts: 547
Location: Auckland, New Zealand
I've looked in my parts manual that is supposed to cover all Dolomite models post 76 and it isn't there. Given there is a picture of that part number listed on Rimmers website (although it is 'no longer available' and is listed for a Spitfire), knowing what the part looks like may enable you to fabricate one and work out where it goes. Maybe if you can locate someone with the MkIV or 1500 Spitfire, that may show you?

Good luck!


 Post subject: Re: Carb return spring
PostPosted: Mon Apr 08, 2019 10:52 am 
TDC Member

Joined: Thu Sep 28, 2006 9:06 pm
Posts: 838
Location: Bristol
It is quite easy to make a plate that can be fixing to the exhaust manifold /down pipe fixing stud and to which the spring can then be attached via another hole in the manufactured plate.

 Post subject: Re: Carb return spring
PostPosted: Mon Apr 08, 2019 8:26 pm 
TDC Shropshire Area Organiser

Joined: Sun Aug 21, 2011 4:12 pm
Posts: 5011
Location: Highley, Shropshire
I've seen this a few times on late 1500s (but not all) It's normally secured to one of the down pipe to manofold nuts via a small egg shaped plate with 2 holes in it, a 5/16" hole for the stud/nut and a pinhole for the spring.

However, since ALL these late cars had concentric return springs on the throttle butterfly spindles, the extra spring is largely redundant! I'll check this when I see you on Thursday and investigate the fast idle.

A cautionary tale! A couple of months ago, I was asked to repair a badly split bulkhead on the well known (in club circles) 1500HL UGH SLOW. Which I duly did and added an auto type bulkhead stiffener bracket as a precaution. Having completed the immediate task, upon testing, the reason for the excessive spitting became obvious, the throttle was so stiff, it could hardly be moved!

This was caused by a combination of factors, mainly a maladjusted throttle cable and linkage which ruined the quadrant operation, but also, someone had fitted a much heavier duty spring in this location. The combination of the 2 faults made the car almost undriveable, but once i'd binned the spring and set up the cable and linkages correctly it was fine, with a free and light throttle operation.


2 door '73 Toledo with Vauxhall Carlton 2.0 8v engine OWF 797M (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 45 years and home of Maverick Triumph.PM for more info or quotes.

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