Here is a chart I came across. I am not the author of it so use it at your own risk: Donate: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=B4EPB8QH2D7US&source=url ..read more

https://www.classicretrofit.com/en-us/pages/about Ok, I'll chime in here. As we [Classic Retrofit] develop high output alternators, we always pay close attention to the belt temperature and slip. Although we recommend a serpentine for running our units at high loads, I did want to find out what causes the alternator belt on the double belt setup to fail. The short answer is heat and belt speed. These tests were done with a high output unit producing 80 - 90A. When the car is driven, the engine fan serves to cool the belts and even with a high load you will rarely see the belt temperature ..read more

When rebuilding the front suspension "A" arms on a 993 removing the old bushings can be a real bear of a job. Traditionally a hack saw is used to cut through the bushing's outer tube that is pressed into the "A" arm casting. Then I ran across this approach, using a puller to remove the  "A" arm bushings. I wonder why I never came across this before?  Here is the video: https://www.facebook.com/reel/211727354790398 Donate: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=B4EPB8QH2D7US&source=url ..read more

CCU Part Numbers: 993 659 047 00, 993 659 047 01, 993 659 048 00, 993 659 048 01, 993 659 047 00, 993 659 047 01 993 659 048 00, 993 659 048 01, 993.659.047.00, 993.659.047.01, 993.659.048.00, 993.659.048.01 993 659 047 00, 993 659 047 01, 993 659 048-00, 993 659 048 01  CCU Switch Part Numbers: 944-653-205-00-01C Slide Knob 964-659-146-00-01C Fan Switch Knob  944-653-208-00-01C Temperature Switch Knob 944-653-922-00 A/C Switch 944-653-921-00 Defroster/Recirculation Switch The below switch seems to not be available as a specific part number fro ..read more

CCU Part Numbers: 993 659 047 00, 993 659 047 01, 993 659 048 00, 993 659 048 01, 993 659 047 00, 993 659 047 01 993 659 048 00, 993 659 048 01, 993.659.047.00, 993.659.047.01, 993.659.048.00, 993.659.048.01 993 659 047 00, 993 659 047 01, 993 659 048-00, 993 659 048 01  CCU Switch Part Numbers: 944-653-205-00-01C Slide Knob 964-659-146-00-01C Fan Switch Knob  944-653-208-00-01C Temperature Switch Knob 944-653-922-00 A/C Switch 944-653-921-00 Defroster/Recirculation Switch The below switch seems to not be available as a specific part number fro ..read more

Early in my career, I worked at a large industrial distributor doing catalog photo work. It was a fastener house among other things. The fastener testing lab was right next to my studio where the engineer there and I became friends doing technical & instructional materials. As a consequence, I became somewhat familiar with how fasteners work. Some of the anecdotal things I learned along the way documenting fastener failures apply to servicing one's Porsche. A bit of nomenclature: A cap screw is only called a bolt when it is used in conjunction with a nut. Otherwise, it is called a cap scre ..read more

 The 993 engine has a vast network of hoses and vacuum lines to it. Here is some information that may help one find there way to where to reattach that loose vacuum line or hose. Donate: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=B4EPB8QH2D7US&source=url ..read more

Folks seem to want to point their finger at the most expensive and messy part to replace first as a root cause of a problem with their 993/964. I have a theory that in the case of what appears to be a non-functioning ABS without any On Board Diagnostic Codes (OBDC) thrown, a pair of faulty wheel sensors that don't signal may result in what appears to be a pump not functioning. When both are faulty or not in position correctly and are not sending a signal to the controller, perhaps, the controller may think the car is simply not rolling. What led me to this theory is I once had a left front ..read more

  Engine Carrier Symptoms of a failed engine mount or bent engine carrier: A sudden change or degrading of shifting feel One or both of the exhaust tips appear to be sitting low in the rear bumper cutouts Failed Engine mounts: There are two engine mounts in the 993/964 that can be seen Fluid Filled Engine Mount in the rearmost left and right sections of the engine compartment. The engine hangs below them held in place by the mount's threaded rod and nut that holds the engine up by the engine carrier. They are fluid-filled with the intent to isolate a good bit of engine ..read more

DOT 25 Manufacturing Location The US Department of Transportation (DOT) requires all the glass to be labeled with a DOT code number that signifies at what factory location a glass component was manufactured.  Here are the locations in Germany. It is interesting to note that for a 993 all the windshields seem to have come out of the same two locations** regardless as to if it is Porsche branded with the triangle-P logo above or is sold under the manufacturer or some other brand. Automotive Glass Manufacturing Locations in Germany: DOT25 FLACHGLAS AUTOMOTIVE GmbH WITTEN, GERMANY ..read more