Volkswagen Type II Transporter 1200 Series Shop Manual page 52

5--Cooling and Exhaust System
(2) Take out the four screws securing each flap
assembly to the fan housing and withdraw the assemblies
complete from the housing.
Installation is a reversal of the removal procedure with
particular attention to the following points:
(I) Ensure that the rubber stop is installed in the right
hand flap housing and adjust the flaps as described.
(2) Screw the thermostat on the end of the connecting
link and adjust the thermostat bracket.
TO ADJUST AIR CONTROL FLAPS
(I) With the housing and flap assembly installed on the
engine, screw the thermostat onto the thermostat
connecting link securely.
(2) Loosen the nut securing the thermostat bracket to
the engine, place the flaps in the fully open position, move
the thermostat bracket until the top. face of the bracket is
just touching the top face of the thermostat and tighten the
bracket securing nut.
(3) Check the operation of the thermostat and control
flaps.
:J. FAN BELT
The fan belt serves two purposes by driving the
generator and the fan for the cooling system, this imposes a
considerable load on the fan belt because of the power
absorbtion by the two units. It is therefore essential that
the fan belt should be in serviceable condition and correctly
adjusted to avoid overheating due to a loose slipping belt or
excess load on the generator bearings due to an overtight
belt.
The belt, when lightly pressed with the thumb, must
deflect approximately .600".
A belt which has frayed edges or shows ·indication of
cracking should be replaced.
NOTE: Fan belts should not be contaminated by oil when
lubricating the engine. Provided the belt has not been
exposed to oil over a long period it may be made
serviceable by cleaning in an alkaline degreasing solution.
Petrol must not be used for this purpose.
(1) Release the nut on the generator shaft pulley. The
pulley can be held stationary whilst loosening the nut by
inserting a screwdriver into the inner pulley slot and
allowing the blade to bear against the top generator housing
bolt.
(2) Detach the outer pulley half.
(3) Insert the spacer washers as necessary to obtain the
correct fan belt tension.
NOTE: The fan belt tension is adjusted by inserting or
removing spacer washers between the puliey halves
depending on whether the belt is too slack or too tight until
it deflects. 600" by thumb pressure.
( 4) Instal the outer pulley half and fit any surplus
spacer washers between the outer pulley and pulley
securing nut. In this way all spacer washers are retained on
the pulley hub.
(5) Instal and tighten the pulley securing nut.
NOTE: If the belt is worn or stretched to the extent where
no washers are required between the pulleys to correct the
tension, the belt should be renewed. The belt should not
bear on the base of the pulley formed by the spacer
washers.
Because there is a tendency for newly installed fan
belts to stretch it is essential that the .belt tension is
checked and rectified if necessary during the first sixty
miles.
4. EXHA1JST SYSTEM
TO REMOVE AND INSTAL SILENCER
On Early Models:
(1) Remove engine rear cover plate and loosen off and
remove the tail pipe.
(2) Slacken back the nuts and bolts at the clamps
attaching the silencer to the front exhaust pipes.
(3) Remove the four nuts connecting the silencer
flanges to the cylinder heads.
( 4) Detach silencer and gaskets from the flanges or
cylinder heads.
52.
On Later Models:
(I) Slacken back the nuts and bolts and remove the
heat exchanger clamps.
(2) Remove the clips connecting the warm air channels.
(3) Remove the four nuts connecting the flanges to the
cylinder heads, and take off the pre-heater pipe.
(4) Take out the four screws securing the manifold
pre-heater pipe.
(5) Detach the silencer and gaskets from the flanges or
silencer.
Installation is a reversal of the removal procedure with