elh0102

Not in my experience. And no, nothing is wrong with the car. Perhaps you thought I was referring to street driving. My car normally runs oil temp around 200-210. But on track, 240 to 250 during hard driving is not unusual, and many folks report considerably higher. I have actively tracked two Corvettes, two E46 M3's, and now the 997S. The Porsche runs the coolest under similar conditions. I could easily push the ZO6 to 300. And the synthetic oil (as the makers like to tell you) really will hold up at that temperature. But, what they don't talk about is the engine., and all parts are not created equal. After talking to several racers whose opinions I trust, it seems a conservative maximum is 260.

Edgy01

I suspect they are saying 250º F for oil temperatures, and not coolant temps. Coolant temps in the 997s appear to stabilize at 175º F while oil temperatures vary with the load and environment.

1999Porsche911

The coolant temperature of the 997's DOES NOT stabilize at 175F. The thermostat does not even open until 182F. The targeted temperature is 194F.

elh0102

I apologize for confusing things above. I'm always so focused on oil temp, that I didn't make it clear I was referring to oil in my response. Indeed, 250 would be a bit warm for coolant. I've never had any temperature problems at all in this car, coolant or engine oil. My point is, don't add the extra radiator unless you need it.

george_k

Also to condider is the additional hardware to break- the oil cooler is in a exposed
spot, a flying piece of debris from the road - and you may possible lose your oil pressure and engine.
I would vote against it unless you are mostly just tracking you car and really need it

Pugnacious

The third (center) radiator in question is for engine coolant (ethylene glycol and distilled water) or ATF (Automatic Transmission Fluid) in a Tiptronic, not motor oil.

The oil cooler on the 997/997S is mounted safely on the right side of the engine under the intake manifold.

Edgy01

My 997 has ALWAYS stabilized at 175F for my collant temp while my oil temps vary with the environmental and engine loading. I have NEVER seen my coolant temp ever above 175F.

How do you explain that? Is the gauge not precise?

1999Porsche911

Your temp gauge is wrong...it's as simple as that. The only time your coolant temperature will be 175 on a running engine is on its way to 200F.

cgng30

i just received my kit for 199 for the complete kit. the hoses are a snap on hoses. just have to remove the front bumper. pia

Deanski

Mine too. It stays mostly at 175. This is with normal driving, not track. Oil temp does move more often than the coolant temp gauge.

Odd, isn't it?

Deanski

Deanski

Then why does my coolant temp stay at 175? I too never seen it move. Oil temp however, DOES move.

I'd like to hear from others reading this thread to add their own coolant temp readings. SO far, two of us agree that the coolant stays at 175 for normal driving.

Deanski

John Velasco

I don't know about the 997 engine but the GT3 engine sticks the coolant temp at 175, now the oil temp is adjusted by my right foot and outside air temp...

GR997S

+1.Very well stated....GR

Pugnacious

For the past 30 years thermostats have been calibrated to open at between 192° and 195° to help reduce emissions. Earlier model engines (pre 1970’s) normally had their thermostats calibrated to open at 180° with early non-pressurized systems as low as 160°.

My coolant temperature gauge also “reads” 175° when fully warmed up and it never budges no matter what the ambient air temperature, terrain or driving style but the oil temperature varies between a normal temperature of 200° up to 250° depending on ambient air temperature, terrain and driving style.

If the engine was truly operating at only 175° the coolant would never get hot enough to open the thermostat. My bet would be that the actual coolant operating temperature to be in the 195° to 220° range and the coolant temperature gauge is nothing more than a glorified idiot light.

blk on blk

Never seen my coolant gauge go above 175 either. oil temp on the other hand varies just like everyone else depenging on driving conditions.