Overheating?

[Dieter H. Marschall]

imported post

Hello,

when I checked my temperature gauge against an infrared instrument, it showed that the hottest point in my cooling system was 85°C whereas the gaugewent up two thirds of the scale - nearing the red.

Kind regards, Dieter.

[Dave L]

imported post

I also fitted a TR 6 spoiler a few years back and have even purchased another one to install on the Stag I am presently restoring. The one that I have fitted to my green Stag looks great butI am not sure how efficient it is. I suspect that it would be more efficient if it was installed lower down,presently the top edge of the spoiler is approximately 1/2 inch below the bottom of theair intake.

Dave L

[GDPR]

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Took me about an hour to trim it - you lose the centre fixing when you cut it, but you build the fixing back in with bridging filler - much easier to "show and tell".....3

[Ferds]

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When you drained the old coolant out, did you remove the drain plugs on eithe side of the engine casing and then flush using a hose?

I did this on my car and it made a huge difference. If no water appears when you remove the plugs, you need to scrape inside the hole with a stiff piece of wire until water gushes out.

Chris

[marshman]

imported post

Dieter H. Marschall wrote:

Hello,

when I checked my temperature gauge against an infrared instrument, it showed that the hottest point in my cooling system was 85°C whereas the gaugewent up two thirds of the scale - nearing the red.

Kind regards, Dieter.

Hi Dieter,

If by infrared instrument you mean a thermometer which you point at a surface then you must remember to take into account the surface you are pointing it at. It measures the amount of infrared being emmitted from the surface and not the actual temperature. For instance if you point it at an older style stainless steel electric kettle that has been polished it will only read around 50 degrees C even when the water is boiling inside, if it has a black plastic lid then the lid surface will measure very close to 100 degrees C. The problem with measuring the temperature of the heads on the Stag engine is if they are clean reflective aluminium they will read lower than their actual temperature. appologies id I am telling you something you already know. The infra red type of thermometer are very good for finding hotspots on the head and comparing one side with the other, but not absolute temperature readings.

Roger

[singapore stag]

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Yes Chris done both sides, becoming quite an expert on draining blocks now.First time round was a bit difficult, I think then/s one iseasy just needs a socket,extension and wretchet.

[Stag Beetle]

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My two pennies worth
After taking the heads off I have now found four waterways completely blocked in the heads, two in each head the radiator core was well over half blocked and the needle on the temperature gauge never went above halfway. :shock: (none motorway driving though)
I only found that the head gasket had gone when I had steam in the exhaust.

[redstag]

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This has been mentioned several times before, to hell with fashion and the latest "upgrade", it's a Stag, it was designed to use Ethelyn Glycol anti-freeze, that's blue to the uninitiated, and people far cleverer than I say it should be binned every 12 months, so what the hell is the point in having a 5 year lifespan ? if you mix blue and the new fashionable day-glo pink/red you get jelly, ever tried blowing jelly through a straw ? difficult ?yes ? well your water pump thinks the same ! you have now completely buggered up you radiator and probably some of the head cooling passages as well, not to mention the heater matrix.There are some folk on here who speak authoritatively without thinking, and others who are too ready to believe them. MAD ? ME ? YES, mad as hell. Martin.

I can't speak authoritatively butI can speak from experience.

I ran my car on the red extended lifestuff for about a year. I then had to change the bottom hose and ended up refilling with the standard blue EG antifreeze.

I did thoroughly flush the whole system, removing the 'stat and all drain plugs and flushed the heater separately. This was about 35,000 miles ago and I have never had a problem with the cooling or seen any signs of jelly. I would have thought if anything was wrong it would have manifested itself in some way or form by now. My car will happily cruise motorway distances at 85+ and will idle until it runs out of petrol without overheating.

I know there are reports of issues with mixing the different types of antifreeze so I am not suggesting for one second that anyone should do so. I just thought Sukh would like to know that it is not necessarily true that he has wrecked his engine.



Pete