tr7triumph.com

Posted: **29 Mar 2011 20:00**

What is the best thermostat and why for the 2.0L engine in the UK

the 82 Degrees

or

88 Degrees

?????????

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If it's not broke don't fix it.

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Posted: **29 Mar 2011 20:18**

stevie_a,

The best one with most of us using the TR7 in the better months e.g. not mid winter is the 82 Degrees.

It depends on how much you get your car in traffic jams, but I have just change my TR8 to 74 Degrees, which is what taxi use. This basically open up even earlier before the engine gets to hot.

Hope this helps

Jim Johnson

Posted: **29 Mar 2011 21:31**

Hi Stevie,

In the UK, assuming we get a summer then 82 degrees, i run a lot colder one in the 4.6 but then getting that lump warm is never a problem !!!

Cheers John

LIVE LIFE A QUARTER OF A MILE AT A TIME!
1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6,ON THE ROAD NOW KICKING AR5E !!!!

Posted: **29 Mar 2011 21:36**

82 degrees for me as well Stevie, i don't think our summers are ever that bad to need an hotter thermostat.

And Polly is garaged during the winter months anyway.[:)]

1980 2.0 DHC (soon to be 16v) - Polly.

Posted: **29 Mar 2011 21:37**

Carb or FI?

Don
"No More Cars For You"
71 TR6- Perpetual remodel
80 TR7 V8 Kick in the pants

Posted: **30 Mar 2011 17:40**

I'd go for the original 88Â°C thermostat.
If it runs hot with that you have a cooling problem.

<center>

1980 TR7 DHC (my first car, now restored and back on the road)
1981 TR7 FHC Sprint (better known as 't Kreng)
[url="http://www.tr7beans.blogspot.com/"]My Weblog[/url]</center>

Posted: **30 Mar 2011 17:48**

If I remember correct from last year it was actually running cold.

That is why I was thinking about it.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------
If it's not broke don't fix it.

http://www.smallbiztranscripts.co.uk

Posted: **30 Mar 2011 19:00**

Obviously 88Â°C is warmer than 82Â°C [;)]

So the 88Â°C thermostat opens at a higher temperature, as a result your engine will run warmer.
But as stated earlier, if the cooling system is in good working condition the engine should be fine with the 88Â°C thermostat.

<center>

1980 TR7 DHC (my first car, now restored and back on the road)
1981 TR7 FHC Sprint (better known as 't Kreng)
[url="http://www.tr7beans.blogspot.com/"]My Weblog[/url]</center>

Posted: **31 Mar 2011 01:42**

I had to fit an 88 to my 7, because it was running too cold with the 80, in our spring, & that equals your 3 days of summer.[:D]

Hasbeen

Posted: **31 Mar 2011 02:08**

I don't think the thermostat value has anything to do with the temperature the engine runs at as it's normal operating temperature is higher than 88 degrees anyway. The temp must be closer to boiling 100 degrees. Since it's under pressure (15 lbs.) the boiling point will be raised higher (than 100 degrees) and because of the coolant it will be raised again beyond that. Regardless of the temp of the thermostat they will all be open at operating temperature (in summer time anyway). The different values determine at what temperature the rad starts comes into play. In winter when you want the heater to work as soon as possible with as warm air as possible you might want at hotter thermostat.

If you are in a cooler ambient air the efficiency of the cooling system may cool the engine down so that the thermostat will start to close depending on the efficiency of the cooling system. In winter my Integra's thermostat stuck open (0 degree thermostat in effect) and due to the efficiency of the cooling system and the ambient air temp I could get no heat out of the heater and the temp gauge barely moved. I pretty sure our TR's system isn't that efficient, I know the Tercel's isn't.

TR7 Spider - 1978 Spitfire - 1976 Spitfire - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT