My 99 seems like it's 'running hot'. On the highway, it's fine, around town, seems fine. But, after a run, and a heat soak, the temp guage runs up about 1/2 way between 90 and the next mark, and just seems to stay stuck there. The fan clutch is engaged at that point, and it never seems to cool down, if I take short hops. The question is, what to do about it.

The dealer was supposed to have comped a coolant change last year. Now, I'm sort of doubting it got done.

So... Are there any clues to get the needle to stay at 1/2 way, or maybe a needle width above 1/2. Anything higher than that just feels hot to me.

Should I change coolant? Any sort of cleaner? Any special instructions for changing the coolant? (I'm a old time VW / Porsche guy. I've only had water pumpers for the past 20 years, they still seem pretty new to me)

Thanks for any clues.

jnc.....

99 E300
99 boxster
70 914/6
03 Jaguar S type (hers)