Timing Chain Tensioner: Application and ID

A 1st tension rail version (steel)
B 2nd tension rail version (lightweight)

NOTE: There are two kinds of tension rail for these engines. The second tension rail version (B) can also be used in engines having the first tension rail version (A). This rule does not apply, however, to cylinder heads with chain tensioner oil pockets.






The tension rails are marked so that they cannot be confused with the tension rail for 4-cylinder gasoline engines.

The tension rail for 4-cylinder gasoline engines is broader (B) at the upper end and is not drilled there either (arrow).






A Tension rail, diesel engines
B Tension rail, gasoline engines

In contrast, the tension rail for diesel engines tapers off at the upper end (A) and also has an 8 mm hole there.






A Tension rail, diesel engines
B Tension rail, gasoline engines

Besides. the lower ends of the tension rails have integral lugs which cut out any risk of confusion.

The lug on the diesel engine tension rail is provided in the direction of No.1 cylinder, and the 4-cylinder gasoline engine tension rail is to be found in the direction of the balance plate.

In the time from June through October 1980, the tensioning rail of an additional manufacturer was installed.

This tensioning rail is not available as a replacement part.






Start of series: June - October 1980