Those of you with Low Temp Thermostats

[pothole]

Originally Posted by Perfectlap

question: does much more frequent expansion and contraction not have some unintended consequences to the engine itself?

What are you inferring involves more expansion and contraction - the low temp or standard stat - and why?

[jb92563]

Doesn't the Dash gage measure the Coolant temperature and not the engines operating temperature?

If the 160 opens 20 degrees cooler than the 180 I agree that you are getting earlier full flow cooling but is that a good thing?

I suppose when racing it is because you probably need cooling to kick in earlier to help ward off any Temperature spikes.

I suppose the cooler engine will also have tighter tolerances which could help in some places and cause premature wear in others.

However the few moments of cooler engine may be very brief as the engine reaches its normal operating temperature and the temp valve is wide open after the initial warm up.

For the average road driver I don't see a benefit and perhaps it even takes the car longer to reach a normal operating temp so it could actually be detrimental.

Just pondering some contradictory logic to see whether the thing is of any use at all or just a $160 gimmick from the Marketing dept.

I don't see any racing drivers cars with stickers advertising their brand of thermostat

Perhaps its one of those secrets the racers don't want to give away

[Perfectlap]

Originally Posted by pothole

What are you inferring involves more expansion and contraction - the low temp or standard stat - and why?

the engine itself. Specifically near the head gasket, and whatever unwelcomed forces could bear upon it. In speaking to my mechanic once, who mainly works on air-cooled engines, he pointed out that these can expand as much as 4-5 mm's in either direction, which of course got me thiking about our varieties.

Originally Posted by jb92563

Just pondering some contradictory logic to see whether the thing is of any use at all or just a $160 gimmick from the Marketing dept.

correct me if I'm wrong but at least some later 997's had these low temp t-stats stock.

[JFP in PA]

Originally Posted by Perfectlap

the engine itself. Specifically near the head gasket, and whatever unwelcomed forces could bear upon it. In speaking to my mechanic once, who mainly works on air-cooled engines, he pointed out that these can expand as much as 4-5 mm's in either direction, which of course got me thiking about our varieties.



correct me if I'm wrong but at least some later 997's had these low temp t-stats stock.

GT2, GT3, and Turbo cars all use a low temp stat from the factory.

[pothole]

Originally Posted by Perfectlap

the engine itself. Specifically near the head gasket, and whatever unwelcomed forces could bear upon it. In speaking to my mechanic once, who mainly works on air-cooled engines, he pointed out that these can expand as much as 4-5 mm's in either direction, which of course got me thiking about our varieties.

Yeah, that wasn't what I was asking. I was asking which of the two stats you were inferring would involve more expansion and contraction - the high temp stat I assume?

[Vista glass]

I recently installed a low temp thermostat and a new cap , along with a coolant pump ,new belt and new coolant. Thats a lot of variables but I have noticed a slight drop in overall operating temperature.Per the dash gauge maybe 10 degrees. I am in Florida and the ambient temps have been in the 90's before and after this work. In May, based on discussions here I was investigating what was an elevated operating temp. I found a bad radiator fan and replaced it. That helped a lot but the dash gauge was still reading relatively high. Two months later the coolant pump bearings seized and the pulley shaft snapped (is that engineered ?). The vehicles operating temperature is now more in line with readings other members report here. Is it is possible the old coolant system components had simply lost efficiency and their replacement brought the system back to specifications resulting in the "normal" operating temp? I have noticed only a small change in the time it takes to reach let er rip operating parameters. [