Cicerosecundus

Early 2001 C4 with the double race IRS bearing assembly. At 95K miles did the clutch (first time) and at the same time replaced the factory IRS bearing assembly with the double race version created by LN Engineering and put in the latest RMS. The factory bearing assembly showed no substantial wear on the bearings, but the engine side seal showed some breakdown, which would have in time led to a leak of engine oil into the bearing assembly with the possibility of bearing failure due to incompatibility between engine oil and the "permanent" grease that Porsche uses inside the bearing assembly. Also put in the LN Engineering 160 degree thermostat. Results: engine runs fabulously well and I do not have nightmares of IRS failure and an engine replacement. Also, with the low temp thermostat, when the C4 is at speed on a highway, the temperature that shows on the temperature gauge is substantially cooler then before. When I get into bumper to bumper traffic, the engine heats up as always. I have ordered a fan controller that when installed will let me program the two fans to come on at a lower temperature and to switch to high at a lower temperature and to stay on for a short period if the engine is heated beyond a particular temperature. My suggestions for taking care of this engine: 1. Never lug it: drop a gear or two if going uphill, even on the highway. 2. Do not leave your P car locked in a garage all Winter - the seals dry out and are damaged. 3. Never go over 3K RPM when warming up the engine and never warm it up at idle. 4. Change oil more frequently than Porsche recommends: I do mine at 5K miles and do three changes to equal one factory change at 15K miles. 5. Do the LN Engineering IRS bearing assembly replacement and replace an older RMS with the newest. Thats it. I understand that there are far fewer engines needing replacement in Europe compared to North America. My explanation is that in Europe a P car is a daily driver year round - it would be unusual in Germany to leave a Porsche parked in a garage for the entire Winter and in good weather to only use it on weekends and at that, when it does not rain. Cicerosecundus

I have a 2001 C4 with 95,000 miles for which the following parts were recently installed: clutch, Inengineering's intermediate shaft bearing assembly (double race), latest RMS, Inengineering low temp thermostat, transmission and motor mounts. I would like to install the Dakota Digital fan controller as well. Reason: this unit allows me to set the temperature at which the fans go on at low speed and set the temperature that they switch to high speed and set them to keep running after ignition turn off if the temperature is above what I set and to run until the temperature gets to what I set. I commute in my C4 and get into traffic jams in the summer with miles and miles of slow stop and go traffic which heat up the engine. With the Dakota fan controller, I can keep the engine running cooler. Does anyone have experience in installing that fan controller? Are you glad that you did it? If so would you be so kind as to offer installation instructions? The Dakota Digital manual is very confusing.