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XLR8 · Posted: Mon Apr 04, 2016 4:23 pm Post subject: Is my NA running too cool?

Hi all,

My 924 NA seems to run very cool all the time.

During normal driving (admittedly usually higher speed as I leave rurally) she gets to the top of the "cold" area on the temp gauge.

Pootling around the town, only to the first line on the guage (is that 1/4 way?).

All with ambient temps up to 30 degC (86 degF).

Am I just lucky? Or is this not usual?

Is my gauge perhaps reading incorrectly (though when I stop the car she never seems "hot")?

Also, the thermofan switch will often stay on for up to 10 minutes after the car has stopped. I fear it may be faulty and switching at a very low temperature.

Any advice appreciated.
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'81 Porsche 924 NA
'89 Eunos Roadster NA6
'06 Landcruiser HDJ100

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

More or less what mine does, due to cold thermostat and fan switch (they come in different temps).

Plus, as you noted, the gauges can be less than 100% accurate, usually due to grounding problems. If you're concerned, get a laser pyrometer and check the water flanges and cylinder head.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

XLR8 · Posted: Tue Apr 05, 2016 6:17 am Post subject:

Thanks Rasta, makes me feel better. I'll ensure the thermostat and thermofan switch are similar in temp some time on the future. I will have the dash out soon and there's quite possibly a ground issue, so will let you know how that goes.
_________________
'81 Porsche 924 NA
'89 Eunos Roadster NA6
'06 Landcruiser HDJ100

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Ground between engine and body can also impact oil pressure and water temp gauges...
_________________
Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3