Vanagon Syncro AWD F4-2109cc 2.1L (MV) (1989)
Drive Belt Tensioner: All Technical Service Bulletins
Alternator - V Belt Slips Under Load
Group: 13
Number 92-01
Date: Jan. 31, 1992
Subject:
Alternator V-Belt Adjustment
Model(s):
All Models, All Model Years
Condition
Alternator V-belt may slip under extreme load conditions.
Service
To prevent possible alternator V-belt slippage, the belt tensioning specification and adjustment procedures have been modified.
When a customer complaint of V-belt slippage is encountered, adjust V-belt tension according to the specifications listed below.
Tensioning Specifications
The following values apply when using the "thumb pressure check" procedure.
V-Belts up to 1000 mm (40 inch) long max. deflection
new belts - approx. 2 mm (5/64 inch)
run in belts - approx. 5 mm (3/16 inch)
V-Belts over 1000 mm (40 inch) long max. deflection
new belts - approx. 10 mm (3/8 inch)
run in belts - approx. 15 mm (19/32 inch)
Note:
These values are valid for all vehicles produced to date.
Adjustment procedure:
On engines that are NOT equipped with the tooth rack on the adjustment bracket, tension belt according to above specifications.
On engines equipped WITH the toothed rack on the adjustment bracket, the V-belt tensioning should be performed using a torque wrench:
^
Loosen all securing nuts for adjustment bracket (A) and alternator by minimum of one turn
Note: