Sorry if this is a daft question but I would really value member opinions on which type of coolant/anti-freeze I should use with my recently re-built Dolomite 1850 engine?
I have always been under the impression blue coolant/anti-freeze is for older engines that are principally cast iron. I.e. The straight six in my TR6. The red/pink variety of coolant for more modern engines that are basically all aluminium. As my 1850 engine is a cast iron block with an Aluminium head, I’m a bit unsure as to the best way forward.
The pink stuff reacts unfavourably with brass, like some radiators and always the heater rad.
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.
David Embery wrote: ↑Fri Apr 04, 2025 7:59 am
My new Rad is an aluminium upgrade Steve.
Does that mean Red/Pink is now best or is it still the blue stuff?
David
David, I tend to use this from GSF, in both my sprint (ally Golf rad fitted) and my spitfire (ford engine, ally golf rad, done nearly 50k in 10 years)
I use a 50% mix, no need to skimp! Stays clean, change every 2 years. Job done. https://www.gsfcarparts.com/products/bl ... kBH_nh9sik
Even if your main rad is alloy, the heater rad is still brass, so pink is still a no-go.
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.
In my 1500TC I have ran Prestone universal coolant since 2015 with no issues (Original rad and water pump, I think as I have not replaced it). Its easy to get and since I use it in my 2000 BMW without issues it makes it cheap.
Although I only do about 2000 miles a year and change it every 4 years with a flush (always seem a shame as after the first change it looked perfect and tested well, but I like to tinker!).
