The 9131-944 is a tensioning tool derived from a discontinued Porsche tool (the P9131). The P9131 was prescribed for the early model years of the Porsche 928. It was later discontinued in favor of the more expensive P9201. We have adapted and extended the original P9131 design for use on the 944.
The tool is a simple approach to a difficult problem – measuring the tension of the 944’s cam and balance belts. To do this, the tool must be precisely positioned on the belt and light finger pressure used to twist the belt. The belt resists the twisting pressure and a scale measures the resistance. A fold-away arm is used as a twisting stop.
Our 9131-944 tool was developed and tested in a series of side-by-side tests with the P9201. This was done on two Porsche 944s (one with new belts and one with used). With careful use, this tool can accurately measure belt tension.
Read more about how it works with this downloadable pdf file ...Version 1.10... Instructions for Using the 9131-944.
Here is an overview of document changes.
