MY97 986 Water Temp

[djoa]

Hi folks! I go thru the forum and saw so many thread about the temp of 986. Me have the same issue of high temp.

Driving time under 30 mins with AC on, it seems to be normal, the temp point to "0" of 180. Outside temp is around 89F. Its acceptable for me, since the AC still on under this condition.

Driving time over 30 or more with AC on, it seems wierd to me, the temp point over the "0" of 180 or even higher. Sometime, the AC shut off itself and back on. BUT, the warning light never turn on so far.

What I have done on it and observe:
- Coolant Temp sensor - no help
- Swap the relay of Engine Compartment Fan relay with Horn relay - no help. The fan is not on when I assume it will turn on in over the point "0" of 180. I guess the relays work because the horn still work after I swap those relays.
- Flush and new coolant - no help
- No water leak on carpet or gorund
- BOTH radiator fans turn on always (Of course, I turn the AC on)

My questions:
- It's relate to coolant tank cap? I saw the article in 996 about the cap, the pressure will leak using the old style cap. Is there any cap case leading to pressure leak in 986 as well?

- Anyone experience the same?

- The engine compartment fan only turn on in randomly pattern, I guess it's not logic because there is no reason the fan still OFF in high temperature. What do u guys think?

[djoa]

anyone?

[Adam]

Does it stay past the "0" at hwy speeds or just in slow traffic?

[djoa]

Originally Posted by Adam

Does it stay past the "0" at hwy speeds or just in slow traffic?

No matter traffic or hwy, its still the same.

[CJ_Boxster]

Well your first discription is alittle confusing but heres how it works, in hot weather (80+F) and even in 70F the temp gauge will sit on top of the 0 on 180. When the AC is off (meaning the snowflake is not lit on ac controls) the fans will turn on when the temp needle reaches the far side of the 0, until it drops to the near side of the 0 towards the 8.

With the AC on, the fans run 100% of the time and usually the temp needle will NOT go beyond the near side of the 0, unless you were racing the engine on the freeway for 10 minutes straight, then it'lll take some minutes of easy driving to drop back down to the near side of the 0 on the 180 mark.

[djoa]

Originally Posted by CJ_Boxster

Well your first discription is alittle confusing but heres how it works, in hot weather (80+F) and even in 70F the temp gauge will sit on top of the 0 on 180. When the AC is off (meaning the snowflake is not lit on ac controls) the fans will turn on when the temp needle reaches the far side of the 0, until it drops to the near side of the 0 towards the 8.

With the AC on, the fans run 100% of the time and usually the temp needle will NOT go beyond the near side of the 0, unless you were racing the engine on the freeway for 10 minutes straight, then it'lll take some minutes of easy driving to drop back down to the near side of the 0 on the 180 mark.

The "0" of 180 is just an indication, acutally, I'm in HK and the temp guage is using Celcius, I just follow F. to explain. Anyway, somtime, the pointer goes beyong the 3rd mark.

After a normal drive and turn off the AC, the radiator fans are still on, I guess this is normal.


But the engine compartment fan is not always on. Even it turns on, the temp didn't drop much, let say only few degree drop and the coolant temp was 103C ~107C, high enough?