MR2 Roadster Owners Club

The Workshop => General => Topic started by: Pete McCue on August 29, 2024, 11:34

Title: Thermostat
Post by: Pete McCue on August 29, 2024, 11:34
My car seems to be a little slow warming up so I was contemplating changing the thermostat. Looked it up online, what a ball-ache that is! Think I'll wait until I replace the coolant with waterless and do it then.  :))
Title: Re: Thermostat
Post by: Call the midlife! on August 29, 2024, 12:43
Apart from the refilling and bleeding of the system it's not all that difficult when underneath the car.
For reasons best left unsaid I did mine 3 times lying on the garage floor...
Title: Re: Thermostat
Post by: Ardent on August 29, 2024, 12:46
@Pete McCue

Is it especially long to warm up?
Might be normal.

With this layout there is approx 9 litres to warm up.
Title: Re: Thermostat
Post by: Carolyn on August 29, 2024, 13:01
They do take a while.
Title: Re: Thermostat
Post by: Pete McCue on August 29, 2024, 13:04
Quote from: Carolyn on August 29, 2024, 13:01They do take a while.

Oh, maybe normal then. I guess that maybe why Toyota fitted the pre-cats? I'm used to my Z3 wich warms up really quickly.
Title: Re: Thermostat
Post by: Gaz mr-s on August 29, 2024, 18:51
Quote from: Pete McCue on August 29, 2024, 13:04Oh, maybe normal then. I guess that maybe why Toyota fitted the pre-cats? I'm used to my Z3 wich warms up really quickly.

Don't think so. Just down to exhaust temperatures.
At the moment mine's 2 1/2 to 3 miles until the needle is horizontal.  If you use a smartphone & Torque pro you can see the temp changing in realtime.
Title: Re: Thermostat
Post by: Ardent on August 29, 2024, 19:05
Same as ^^^^

2.5 3 miles to temp gauge needle at horizontal.

Then doesn't move at all despite data in torque pro showing otherwise.
Title: Re: Thermostat
Post by: Joesson on August 29, 2024, 19:17
Quote from: Ardent on August 29, 2024, 19:05Same as ^^^^

2.5 3 miles to temp gauge needle at horizontal.

Then doesn't move at all despite data in torque pro showing otherwise.

In case anyone is wondering, if things go amiss, the gauge needle does go up beyond horizontal PDQ. Ask me how I know!
Title: Re: Thermostat
Post by: Gannumay on September 9, 2024, 17:24
Totally get that. I had the same issue with my old car—took forever to warm up, and changing the thermostat was such a pain. Ended up waiting until I needed to swap the coolant anyway, and did it all in one go. Saved me the headache of messing with it twice.