Have most people on here replaced the coolant resevoir tanks on their 99s? im debating having this done even though right now just replacing the cap seems to have done the trick.

 

mine leaked... it was replaced right away - the dealer told me that this is a pretty common problem

 

I think your going to need a coolant tank mine presented itself similar to yours. I have a 2001 C4 3.4L but I think they are using the same plastic coolant tanks that crack due to the heat in that area, just MHO.

 

Haha this thread makes me belly laugh!! I have the same problem---getting my cap replaced asap!! Thanks guys!!

 

I experienced a minimal loss of coolant over the last month. When I refilled the coolant, I noticed a small amount of coolant around the lip where the reservoir cap is attached. It appears the reservoir cap is the original; part# 996-106-447-01. I ordered an updated model from Pelican Parts; part#996-106-447-04; $23.00. Hopefully, this will resolve this issue.

 

my coolant leak is getting worst, so mine will be at RAC Performance monday..I'd replaced the cap & it still leaks..thought about replacing the tank myself but decided not to..too much of a PITA..

 

I have noticed I add about 1 or 2 ounces every 3-6 months into my overflow tank. I replaced my cap with an updated cap and tank 3 years ago. I have never seen a leak or drip....No overheating...Cleaned the radiators and combed the fins.
1999, 129,000+ miles, tip, autocrossed monthly, driven weekly.

 

Yea I opted to go with factory cap...paid $21. From Porsche dealer around me. No issues since....put about 200 miles on it this weekend.

 

Mine did that also turned out to be hairline crack in 1 of the heads. Inspect your sparkplugs.

 

bout time to change the plugs anyway. If I remember correctly a plug that has been burning water would be clean...is this correct?