How long does it take for your 964 to get close to the temp red zone?

ACSGP · 11-04-2009, 05:22 AM

Was in stop-go traffic yesterday, and after about 25 mins, the temp crept up to just below the red zone and the warning light (the red ! on the same gauge) came on. The light went off after moving again, but temp didn't drop. The rear spoiler was put up manually after 15 min of being stuck, but the temp still kept going up.

Normal?

rotorheadcase · 11-04-2009, 05:35 AM

Never even seen past the 9 o'clock on my car even in a Perth summer with A/C running and peak hour traffic. Perhaps it's the humidity rather than the air temperature which is causing the overheating? What mark does the temp normally sit at?

Neil

John Boggiano · 11-04-2009, 07:23 AM

Maybe your oil thermostat is sticking/faulty.

Talat · 11-04-2009, 08:11 AM

Mine was up to between 9 and 10 o'clock last night when stuck in traffic on the M6 for around 1 hour - came down quickly enough once the car started moving for a sustained period. Is there anything that can be done to help cooling in this scenario ?

rotorheadcase · 11-04-2009, 08:22 AM

This is about the time the words"engine undertray" are usually whispered...

ACSGP · 11-04-2009, 08:45 AM

Quote:

Originally Posted by John Boggiano

Maybe your oil thermostat is sticking/faulty.

You could be right. The mechanic thinks that the low speed fan switch for the front oil cooler is spoilt, so will be checking that. Happened again this evening, and almost hit the red zone.

It;s usually 28C ambient air temp here, and it's not happened before as it stays at 9 o"clock usually.

jimq · 11-04-2009, 09:12 AM

there is a switch mod that can be wired in so you can turn the fan on manually if needed

Rocket Rob · 11-04-2009, 09:27 AM

When the engine is hot, put your hand on the right front fender, right next to the headlight. Is it hot or cool? It should be very warm. If not, I suspect your thermostat may be faulty.

911URGE · 11-04-2009, 12:30 PM

I have never seen mine go into the red even during a hot summer autox. Checking if the fender is warm/hot while its been sitting in hot sunlight may make it difficult to make a determination if things are working.

Here is a good link on how to check your oil cooler fans.

http://www.porsche964.co.uk/technical/cooling.htm

If the car is running hot there are a few items that could be the culprit

Oil cooler fan relay
Oil cooler fan failure of low or high speed fan
Oil cooler fan resistor
Thermostat issues

Another good link on Oil cooler fan operation and troubleshooting

http://p-car.com/diy/fan/

Trader220 · 11-04-2009, 01:05 PM

Remove that undere tray right away! It will make your car much much faster and cooler!!! If you find an RSA with crinkle finish under the bonnet and wheel wells buy it right away thats a much much faster car. The ultimate would be one of those seam welded RSA's with RSA chalked onto the cases. The real secret, and I should not tell it here but I will is they pulled the best 3.6's off the line and specially put them in the RSA's!

jimq · 11-04-2009, 01:06 PM

Quote:

Originally Posted by Rocket Rob

When the engine is hot, put your hand on the right front fender, right next to the headlight. Is it hot or cool? It should be very warm. If not, I suspect your thermostat may be faulty.

Also see if the fan is on. It could also be the thermo switch going into the cooler thats not turning the fan on.

964Q · 11-04-2009, 01:12 PM

I spent about 20-30mins in stop and go traffic on the freeway going up to LA and it rose to between 9-10 o'clock. This was during a cooler day this summer. The comments above are informational, sounds like there is something wrong.

braol · 11-04-2009, 05:44 PM

Thermostat, blockage, or fan temp switch bad (or all three...eeek).

tbennett017 · 11-04-2009, 05:48 PM

I did the fan mod (installing a switch to break contact on wire #16 can force the cooling fans on). I use that to force the fans on when in traffic.

jembolt · 11-04-2009, 07:28 PM

When I first got my car the temp would rise dramatically on hot days. It was a bad thermostat.
After I changed it, I've not had any problems with the car getting hot.

11-04-2009, 05:35 AM	#2
rotorheadcase Addict Rennlist Member Join Date: Oct 2005 Location: Perth, Australia Posts: 369	Never even seen past the 9 o'clock on my car even in a Perth summer with A/C running and peak hour traffic. Perhaps it's the humidity rather than the air temperature which is causing the overheating? What mark does the temp normally sit at? Neil __________________ ...leave me here in my, stark-raving sick, sad, little world.

11-04-2009, 07:23 AM	#3
John Boggiano Addict Rennlist Lifetime Member Join Date: Jul 2002 Location: Cheshire, England Posts: 5,038	Maybe your oil thermostat is sticking/faulty. __________________ John Boggiano 2007 997 GT3 - current... er, I mean former 1990 964 C2 - sadly missed... no, make that Home Again

11-04-2009, 08:22 AM	#5
rotorheadcase Addict Rennlist Member Join Date: Oct 2005 Location: Perth, Australia Posts: 369	This is about the time the words"engine undertray" are usually whispered... __________________ ...leave me here in my, stark-raving sick, sad, little world.

11-04-2009, 09:12 AM	#7
jimq Burgled Rennlist Member Join Date: Aug 2003 Location: Altamonte Springs, Fl/Gwynns Island, Va. Posts: 11,733	there is a switch mod that can be wired in so you can turn the fan on manually if needed __________________ jim *Conservatives....We work hard so you don't have to* 91 White C2 Cab tiptronic 03 Black 996TT X-50 Grocery getter 2002 Dodge Ram 5.9L Gas Hog Bend-Pak Scissor Lift 64 230SL Mercedes (SOLD after 18 years ) Some other Porsche's

11-04-2009, 09:27 AM	#8
Rocket Rob Addict Rennlist Member Join Date: Aug 2001 Location: Nashua, New Hampshire, USA Posts: 2,101	When the engine is hot, put your hand on the right front fender, right next to the headlight. Is it hot or cool? It should be very warm. If not, I suspect your thermostat may be faulty. __________________ Rob '90 C-4 Cab (daily driver-230K miles on original engine) '91 C-2 Coupe (weekend toy/DE car) '91 Honda Civic Si (winter-mobile)

11-04-2009, 05:22 AM	#1
ACSGP Addict Rennlist Member Join Date: Mar 2009 Location: Singapore Posts: 140	How long does it take for your 964 to get close to the temp red zone? Was in stop-go traffic yesterday, and after about 25 mins, the temp crept up to just below the red zone and the warning light (the red ! on the same gauge) came on. The light went off after moving again, but temp didn't drop. The rear spoiler was put up manually after 15 min of being stuck, but the temp still kept going up. Normal? __________________ ____________________________________________________ Current : 2004 A6 C6 3.0 Brilliant Black, chipped, lowered + forged MTM Bimotos 1990 Porsche 911 C2 Tip, Guards Red Not Forgotten : 1989 80 1.8S Manual, 1998 A6 2.4 FWD, 1994 80 2.0E, 1972 Beetle 1985 Kawasaki 900 Ninja, 1984 GPz 750, 1982 GPz 550 Unitrak

11-04-2009, 08:11 AM	#4
Talat User Join Date: Dec 2001 Location: UK Posts: 76	Mine was up to between 9 and 10 o'clock last night when stuck in traffic on the M6 for around 1 hour - came down quickly enough once the car started moving for a sustained period. Is there anything that can be done to help cooling in this scenario ?

11-04-2009, 12:30 PM	#9
911URGE Addict Rennlist Member Join Date: Apr 2006 Location: SoCal Posts: 1,136	I have never seen mine go into the red even during a hot summer autox. Checking if the fender is warm/hot while its been sitting in hot sunlight may make it difficult to make a determination if things are working. Here is a good link on how to check your oil cooler fans. http://www.porsche964.co.uk/technical/cooling.htm If the car is running hot there are a few items that could be the culprit Oil cooler fan relay Oil cooler fan failure of low or high speed fan Oil cooler fan resistor Thermostat issues Another good link on Oil cooler fan operation and troubleshooting http://p-car.com/diy/fan/ __________________ Stephen 1989 Carrera 4 - Guards Red Andial Sport Exhaust & Chip, Andial Strut Brace, Eibach Springs, Techart Pedals, Cup II Rims, Porsche Design/Momo Wheel, Aero Mirrors, Clear Corners. My 964 Photo Album / The 964 VIN Project Save the Flash Motors4Toys Charity Car Show

11-04-2009, 01:05 PM	#10
Trader220 Addict Rennlist Member Join Date: Mar 2003 Location: Philly Posts: 2,281	Remove that undere tray right away! It will make your car much much faster and cooler!!! If you find an RSA with crinkle finish under the bonnet and wheel wells buy it right away thats a much much faster car. The ultimate would be one of those seam welded RSA's with RSA chalked onto the cases. The real secret, and I should not tell it here but I will is they pulled the best 3.6's off the line and specially put them in the RSA's! __________________ 1987 TARGA 1989 TURBO 2001 HD ROAD KING 993 993 C2s RS America various 964 Coupes Various 3.2 Carreras 944 Many HD's STOLEN 1994 Speedster

11-04-2009, 01:12 PM	#12
964Q User Join Date: Aug 2008 Location: San Diego, CA Posts: 79	I spent about 20-30mins in stop and go traffic on the freeway going up to LA and it rose to between 9-10 o'clock. This was during a cooler day this summer. The comments above are informational, sounds like there is something wrong.

11-04-2009, 05:44 PM	#13
braol Addict Rennlist Member Join Date: Dec 2006 Location: Encinitas, CA Posts: 35	Thermostat, blockage, or fan temp switch bad (or all three...eeek). __________________ Chris Bethesda, MD 1991 Targa, Guards Red

11-04-2009, 05:48 PM	#14
tbennett017 Addict Rennlist Member Join Date: May 2007 Location: Portland, Oregon Posts: 867	I did the fan mod (installing a switch to break contact on wire #16 can force the cooling fans on). I use that to force the fans on when in traffic.

11-04-2009, 07:28 PM	#15
jembolt Addict Rennlist Member Join Date: Nov 2006 Location: New Jersey Posts: 8	When I first got my car the temp would rise dramatically on hot days. It was a bad thermostat. After I changed it, I've not had any problems with the car getting hot.