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: Spark plugs
PostPosted: Mon Nov 21, 2016 6:03 am 
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Joined: Mon Jan 05, 2015 12:42 pm
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Location: Ashington, West Sussex
Just found this on spark plugs. When I first got my dolomite, I struggled a little with mixture. Something like this would have been really useful. Hope it helps someone out there with an equivalent lack of knowledge on classic cars!

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HQentity (Kyle)

1975 TRIUMPH DOLOMITE 1850 in Honeysuckle (Nina) 2015-2020
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"The harder the conflict, the more glorious the Triumph." - Thomas Paine


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 Post subject: Re: Spark plugs
PostPosted: Mon Nov 21, 2016 5:10 pm 
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Great posting ! Its the sort of thing that needs to be made a "sticky" perhaps.
Tony.


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 Post subject: Re: Spark plugs
PostPosted: Mon Nov 21, 2016 11:16 pm 
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That's a great find, and thanks for sharing, so useful.


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 Post subject: Re: Spark plugs
PostPosted: Tue Nov 22, 2016 8:55 am 
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Thanks very much guys! I definitely thought it was useful! Tony what do I do to get it stickied?! Do I contact someone in particular? :)

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HQentity (Kyle)

1975 TRIUMPH DOLOMITE 1850 in Honeysuckle (Nina) 2015-2020
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"The harder the conflict, the more glorious the Triumph." - Thomas Paine


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 Post subject: Re: Spark plugs
PostPosted: Thu Apr 30, 2020 11:34 am 
if the plugs have a slight pink shading or blue that could be a sign the of the head gasket on its way out. Not experienced it on any of my Dollies but did once on a Alfa Romeo


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 Post subject: Re: Spark plugs
PostPosted: Fri Mar 03, 2023 12:49 am 
Hi. This is a new question for this post. Does any of the information change when lead-free gasoline is used?
Thanks. :bluewave: Walter


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 Post subject: Re: Spark plugs
PostPosted: Tue Mar 07, 2023 1:50 pm 
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Joined: Sun Aug 21, 2011 5:12 pm
Posts: 7013
Location: Highley, Shropshire
Quote:
Hi. This is a new question for this post. Does any of the information change when lead-free gasoline is used?
Thanks. :bluewave: Walter
No change in the effect from unleaded fuel, nor, as far as I can tell, from modern E5 or E10 ethanol added fuels. Though you may find that you will need to alter the heat range of the plugs you use to keep up with the hotter running modern fuels and maintain engine efficiency.

Question! Apart from Avgas which is for light aviation use and illegal in road cars, (and flippin' expensive!) can anyone still get leaded fuel?

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.


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 Post subject: Re: Spark plugs
PostPosted: Wed Apr 05, 2023 4:07 am 
Leaded gasoline is still available in Canada, but only in Chevron-brand gas. It is rated at 94 Octane which doesn't compare with the UK octane rating system.


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 Post subject: Re: Spark plugs
PostPosted: Sat Apr 08, 2023 3:28 pm 
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TDC Shropshire Area Organiser

Joined: Sun Aug 21, 2011 5:12 pm
Posts: 7013
Location: Highley, Shropshire
Quote:
Leaded gasoline is still available in Canada, but only in Chevron-brand gas. It is rated at 94 Octane which doesn't compare with the UK octane rating system.
British petrol (gas) sold today (next week may be different) comes in only 2 basic types. The UK standard is called E10 and is unleaded fuel of approx 95 RON and which contains a maximum of 10% added ethanol.

The other and more expensive variety is now known as E5, formerly "Super Unleaded", an unleaded fuel of 97-99 RON rating (depending on brand) and containing no more than 5% ethanol


The RON rating currently used in the UK roughly corresponds to the old octane rating or around 3 star in the old british star rating, where 2 star was 91-2 octane, 3 star was around 95 octane, 4 star was 98 octane and the late lamented 5 star was 101 octane.

5 star was scheduled to be phased out over 5 years, starting in 1971. In fact, it disappeared from UK forecourts in a matter of weeks! 3 star was phased out somewhere in the late 70s as there was little demand for the "halfway house" grade, leaving only 2 star and 4 star available.

Things stayed that way, through the introduction of unleaded fuel in circa 1986, which became universal in 1988 and on until relatively recently when the first ethanol added fuel was introduced. At first the base fuel was 95 RON E5 and the "Super unleaded" was 97-99 RON and largely without ethanol (though pumps invariably described it as E5 as some counties added ethanol) A couple of years ago the system was updated (?????) again to the current ratings above.

If you have an OHV engined Dolomite In Canada, I would recommend you seek out and use the Chevron 94 octane leaded fuel as this will be kinder to your cast iron head. However the OHC "slant" engine with it's alloy head and steel valve seats is perfectly happy on unleaded fuel. If you have a slant, octane rating is more important than lead content, search out the highest octane unleaded fuel you can easily find, it'll be fine.

One last word of warning. If you are likely to have to use ethanol added fuels, even occasionally, it's best to get all your rubber fuel hoses replaced with ethanol proof material like Gates' "Barricade". Ethanol, even as little as 5%, literally dissolves ordinary rubber fuel pipes and can easily cause fires. I've seen it too often, even here in the UK where awareness of the problem is high!

Steve

_________________
'73 2 door Toledo with Vauxhall Carlton 2.0 8v engine (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine (The Dolomega)
'72 Triumph 1500FWD in Slate Grey, Now with RWD and Carledo powertrain!

Maverick Triumph, Servicing, Repairs, Electrical, Recomissioning, MOT prep, Trackerjack brake fitting service.
Apprentice served Triumph Specialist for 50 years. PM for more info or quotes.


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