Porsche® 944 Belt Tensioner Gauge, 1982-1991
- Genuine Porsche Part
- Properly Set Timing Belt Tension
- Use With P000.721.920.12 Calibration Bar
- Also Called the P9201 Tool
There are a variety of theories as to why the 944 has had so many belt problems. One of the best of these has to do with the expanding aluminum block coupled with the fact that the 944's engine is quite large (when measured from the cam to the crank). With so much aluminum between the two, there a great potential for expansion as the engine warms up. The cam belt will stretch a little but not nearly as much as the aluminum will grow. So, the tension must be set loose enough so to compensate for expansion but tight enough so that it doesn't skip on the cam shaft and jump out of time on the coldest of mornings. If too tight, the cam belt will place undue stress on the waterpump (waterpump failures are also common on 944s) or even break the cam belt completely.
If you've done the process as tensioning as Porsche recommends, you will find that the sweet-spot of belt tensioning is a very small - its very easy to get this wrong. Getting it wrong won't mean a next-day catastrophe, failures don't happen that quickly. More likely, it will mean the difference in a belt that lasts 30000 miles and one that has problems, resulting in a serious repair (like a water pump failure) after only 10 or 15000 miles.
|Make / Model||Series||Body||Notes||Year|
|PORSCHE 944||1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991|