From the ribbed vee belt tensioner, rotating
noises can be heard.
The ribbed vee belt tensioner torsion spring can make these rotating
noises because of the first and/or the last spring winding and the
spring spacer on the base plate identical rising conditions between
them. When at idle speed these noises can be heard.
Models affected: 1Z/AFN engine
Parts replacement. Part number unchanged. Optimized ribbed vee belt
tensioners are on the mounting bolt of the tensioning roller identified
with a white mark
Gurgling noises inside the vehicle.
Models affected: 4 cyl. engines
The cooling system needs to be bled as follows:
With coolant fill up the reservoir to the brink.
From the heat exchanger pull off the LH hose until the air escapes from
the ventilation hole. The reservoir has to be completely full. When the
air escapes, push the coolant hose back on then tighten it.
Once you get a small gap at the top between the pipe of the heat
exchanger and the hose pull off the RH hose from the heat exchanger. Do
not take away the coolant hose altogether The reservoir must always be
completely full. When the air finally escapes, push the coolant hose
back on and tighten it. The reservoir must be filled to maximum. To
create a pressure of approx. 0.5 bar in the cooling system use tester VW
1274. When in idle speed run the engine until the coolant thermostat
opens. Whilst holding the engine speed at approx. 2,000 rpm, briefly
press down the accelerator with strong force for a few times, this will
help the air to escape from all the corners of the engine. Remove the
tester and correct the coolant level when no more air enters the
reservoir through the ventilation hose.
Please Note: Hot vapors can escape so make sure to unscrew the
Vehicle makes a dull sound at approx. 3,500 rpm
The exhaust system shudders and are felt in the passenger position.
Engine code AAD, AAE
Clip - Part No. 4A0 253 139 A
Flat round bolt - Part No. N 040 262 2
Hex. nut - Part No. N 011 008 18