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The red light on the coolant temperature gauge of my car occasionally (but in recent times more frequently) flashes slowly (0.5 Hz).
In a post dated 7/30/2018 Loren listed four conditions for the light to come on. The two conditions for which the light flashes slowly (0.5 Hz) are the following:
Engine coolant too low
Engine compartment temperature too high
None of these conditions applies to my car.
The light comes on after about 20 minutes of driving and it seems to be triggered (but not always) by running the engine above 4,500-5,000 RPM (with coolant temperature at normal values and, I assume, engine compartment temperature also at normal values. This is not driving in heavy traffic, this is normal out of town driving ).
Using the Porsche tester it was possible to establish that the engine compartment fan works. However, it does not come on when I drive the car in traffic and the coolant temperature gets to 215F. This, I would assume, should cause the engine compartment temperature to become elevated and the fan to run.
The engine compartment sensor, located on the passenger side intake manifold, is installed properly and seems to read the temperature of the engine compartment correctly.
Any thoughts on what is going on?
When we replaced the coolant in my car in 2013, we used coolant Porsche part number ‘000-043 -301-05-M100’(pre-mixed). The color, based on a little quantity left in one of the 2013 bottles, was red. The coolant in the car seems yellow now.
I have just topped off the coolant today, using Porsche coolant part number ‘000-043 -305 15’, red color (I mixed it with water, 50%).
Could somebody please confirm that the 2 coolants are compatible?
I'd appreciate a second set of eyes to verify these part numbers.
2003 C2 6MT
Red Arrow: 996-106-233-56
Green Arrow: 996-106-212-61
Yellow Arrow: 996-106-222-67
I'm least sure of the 3rd one but it looks like they simplified it for the Mk2 but didn't bother to update the Illustration because one end of this has 2 connections in the illustration but mine doesn't and the picture on Pelican Parts looks like mine, so I think I'm right.
Thanks for the help!
Recently I had been noticing issues with my cooling system the coolant temp guage would go past the 0 on 180 and I wouldn’t hear fans or anything. (Already tested fans and resistors and relays). The temperature Will continue to creep up if I sit still, with no signs of fans, AC OFF.
I replaced the coolant temp sensor. Problem fixed!! Then same issue again it seems after a week of driving.
Now i currently have ordered another temp sensor just Incase I maybe did something to cause the other new one too fail, I’ll be changing it again today.
However I was doing the climate control hack to check my actual temperatures today while doing a short troubleshooting drive. And I noticed my oil temperature said 0, which is physically impossible 🙄
Is it possible the oil temp guage is throwing off the coolant sensor? Is it even possible for the oil temp sensor too go bad but not the oil level sensor? (They are a 2 in 1 sensor)
THANK YOU IN ADVANCE
By gene volpe
1999 Porsche Boxster overheating issue, Car has 133,000 miles on it.
Car overheats when driving on the highway
Letting the overheated car sit still and idle after the temperature gauge gets into the above 180° field will cause the temp to fall to just slightly higher than normal.
The radiator fans both run and you can feel the air blowing into the radiators and under out of each front end of the car and seems like they are running on high speed. Seems to be a lot of air being drawn into the front bumper opening and being blown out behind the rad. Discharge air seems cooler than I would expect since it is blowing across a 180° radiator. No steam or smell of coolant. Both fans are also able to be activated by my Durametric unit but my durametric unit does not have the ability to activate on low and high only on-off. I do not have the PRO version. Did not check with A/C on/off.
The coolant tank is at max mark on tank, no bubbles inside tank when car is running and warmed up.
Not losing coolant at all. New radiator cap replaced last summer cap says motorad germany T25 VW OE P.N. 171121321D. I had it on the car all last summer and did not have any overheating issues. When I bought it it was supposed to be an OEM replacement for my Porsche.The antifreeze was flushed and replaced when I replaced the water pump last year. It was leaking at the seal hole. A new belt was also put on at that time. It did not overheat during the summer months of driving it after all that was done,
The oil is full and there is no foam in the oil whatsoever.
The interior heater puts out a lot of heat so I assume I am pushing water because I used it to cool car down when it overheated
One thing I did notice, I did not hear the engine bay fan run at all. I used to hear this whenever the car was hot when I parked the car. Could it be responsible for the overheating problem by itself? How do I troubleshoot this fan. Tomorrow I am going to drop front bumper cover and clean the radiators.
Would like to keep car for a while yet, bought it 4 years ago with 66,000 miles. Wife and I put a new roof on and new seat upholstery, had a clutch installed. So I have a few dollars in it already.
Any help would be greatly appreciated, Thanks