Hands too large...
Join Date: Feb 2009
Location: South Africa
County: Northern Cape
You can also use a 8mm drill bit (or round bar), and a large flat screwdriver, instead of the tensioning tool.
I always use a thin copper wire (instead of cable tie) to tie the tensioner in the fully tensioned position, before installation. With the belt fitted, I then fasten the tensioner, remove the wire and check the timing.
For a new belt I always leave the pointer at about 6 mm above the mark. Within the first 1000 km, the belt will stretch by about 1 mm, resulting in the pointer lowering by about 6 mm (the pulley rotating on an eccentric bush).
For checking the belt tension, the engine should be turned forward only, for 2 revolutions (or multiples of 2). This allows for proper alignment and seating of the belt on all the pulleys.
You can also run the engine without an auxiliary belt and cam covers afterwards to check that everything is fine. The pointer should then hover at the set position (the pulley is always free to move, since it is one of the "automatic tensioning" types.
Please note that when the engine is shut down, the pointer may randomly come to standstill at any position, due to compression kick-back on the crank-shaft.
Last edited by DawieS; 19-03-12 at 09:00.
Reason: Added additional information