Coolant saga mystery

[bnewport]

I brought my car (99C4) to the dealer who did a pressure test and checked the oil for coolant mixing. He also checked all the pipes for residue from leaking and nothing.

So, everything is negative for leaks but I'm putting min-max fluide every morning. Any ideas?

[Loren]

Well, the coolant has to be going somewhere. If your dealer did the pressure test correctly then it may be time to look at your oil. It will not be good news if there is coolant in your oil.

[bnewport]

He said he did a coolant in oil test and it was negative.

[Loren]

There is a new procedure (Supplement 66 in 2002) in the service manual that says the dealer is to perform two tests (for leaks). One is the normal pressure test and the second is a vacuum test (which is also how they recommend to fill the system without air bubbles). You might ask if your dealer is aware of this.

Also, make sure you have the new design radiator cap. All Carrera's (and Boxster's) should be using 996 107 447 01. The old part number which ended in 00 did not seal correctly. The caps are only $14-$15 so definitely replace it if you need to.

(Thanks to the guys at RMG Enterprises for this tip!)

[bnewport]

How hard is it to change these?

Thanks