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| Volkswagen Engine >> HYDRAULIC LIFTERS
Hydraulic Lifters On
1986 Volkswagen 1.6L (96.9 CID) Diesel Engines
Volkswagen 1.6L (96.9 CID) diesel engines used on the 1986 Jetta
and Golf are now equipped with hydraulic lifters.
In comparison to mechanical lifters, these hydraulic lifters do
not require valve adjustment as part of routine maintenance
service or after engine disassembly.
According to VW, intermittent valve noise is normal during
startup and does not require replacement of the lifter assembly.
Use the following procedure to determine when the hydraulic
lifter needs to be replaced.
Start the engine and allow it to reach operating temperature. The
cooling fan should come on at least once.
Increase engine speed to 3500 RPM, maintain this speed for 2
minutes. Allow the engine to return to idle. If lifters are still
noisy they should be replaced.
Remove the rocker cover and rotate the camshaft so that the lobe
above the lifter to be tested is at base circle (lobe facing away
from head). Using a wood stick or other suitable tool press down
on the lifter (see illustration). If the lifter can be depressed
by more than .004 replace the lifter.
(insert illustration)
The AERA Technical Committee
October 1987 - TB 462
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