1997 Boxster

[doncarol]

I have a 1997 Boxster that occasionally has an overheating indicator light. I check fluid, turn on heater, release air valve. The red overheat light only comes on sporadically. Any ideas where I should start would be appreciated.

[Loren]

:welcome:

Could be as simple as a bad sensor (on the bottom of the coolant tank.

[txhokie4life]

:welcome:

Could be as simple as a bad sensor (on the bottom of the coolant tank.

Check coolant level -- open bleed valve see if there is air in the lines?

Check thermostat is opening properly (pull it and test it on the stove with a thermostat)

Check the water pump? They are only good for 60K miles and some die at 30K.

Are the fans coming on? Clean off/out radiator grill....

do not run overheating -- could lead to blown headgasket or equivalent.

m

[kbrandsma]

Check your blue coolant resevoir cap in rear trunk. If it ends in 00 replace. I have a 98 with 64K and recently had to replaced mine with the latest version ending in 04.

Part number 996.106.447.04

[pk2]

Is your temp gauge reading where it should be (need to elaborate) and it's just your light(?), before you go to nutz, find out if it is really overheating with a long thermometer. I'd lean towards Lorens thought a sensor, maybe even just a sensor wire grounding (or not). Intermittent problems are more likely to be electrical than mechanical.

Regards, Pk

Edited August 28, 2009 by pk2