Stuck open thermostat.

**4bye4** · 12th April 2016, 11:52 AM

A thermostat is a fairly lazy device. I am not sure how long it would take from fully open when you are driving hard to fully closed when stopped at the lights. Its possible I would think that the temp is falling off until the thermostat catches up and regulates the temp of the water as it is supposed to do.

**Wizard52** · 13th April 2016, 11:46 AM

Originally Posted by biggqwesty

Hmm interesting.. did you test thermostat before installing?

Brand new one

**mudnut** · 13th April 2016, 11:56 AM

Yep I have been stuck on the side of a busy highway because the brand new thermostat I had put in failed to open, I test any thermostat I am going to install and I advise anyone to check them by putting them in a pot of boiling water and seeing they work.

MB · 13th April 2016, 09:38 PM

Originally Posted by the evil twin

Those symptoms are either a failed thermo or no thermo at all

..........:-)

MB · 13th April 2016, 09:40 PM

Apologies ET for ...... Forum Runner makes us add at least 10 characters :-(

MB · 13th April 2016, 10:08 PM

Originally Posted by garett

<img src="http://www.nissanpatrol.com.au/forums/attachment.php?attachmentid=66172"/> this is a thermostat from a td42. seized open. couldn't get it warm normal driving had to thrash it up a steep hill to warm it a bit. then it would cool off pretty quickly.

Nihao Garett,

Cooling systems on any car are strange and confusing at best, well stock designed by Nissan we have :-) !

My own personal experience is that in an emergency we can pull out any cars jammed TS and thereafter experience exactly what you're describing.

Cheers MB

**BigRAWesty** · 18th April 2016, 08:35 PM

So I'm really unsure now..
Had car up to 87oC tonight and now had it idling for about 10 mins and it's only dropped to 84oC...
It's currently 11.5oC outside..
Maybe it's in its way out..

MB · 19th April 2016, 11:08 PM

G'day Westy,
Such a cheap and easy part to changeover/test, honestly worth a try first old mate!
Yanks I've worked with change em seasonally to suit their radical climate +/- 110/40 :-)

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**BigRAWesty** · 21st April 2016, 04:17 PM

Originally Posted by MB

G'day Westy,
Such a cheap and easy part to changeover/test, honestly worth a try first old mate!
Yanks I've worked with change em seasonally to suit their radical climate +/- 110/40 :-)

Sent from my iPhone using Tapatalk

Yea I've had a look at the zd30 thermostat location. ...
It's not pretty lol

**Hodge** · 21st April 2016, 04:19 PM

Just ask threedogs he just went through that drama lol.

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