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Move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A should move independently of the secondary rocker arm B.
If the intake secondary rocker arm A moves freely, go to step 5.
If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, then check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
Repeat step 4 on the remaining intake secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 6.
Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.0 kgf/cm2, 57 psi).
Install a 10 x 1.0 mm adapter to the inspection hole, then connect the air pressure regulator
With the specified air pressure applied, move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A and secondary rocker arm B should move together. If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, and check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
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code p 2646 refers to rocker arm actuator A bank 1---performance problem or actuator stuck off=== causes wiring--- rocker arm actuator
discuss the problem with a service dealer shop or an accredited service shop that has experience on your make of vehicle
with rocker arm problems , to stop rotation it may be bottoming out on a valve spring and not letting the cam shaft turn .
talk with a shop for a proper diagnosis and quote
Move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A should move independently of the secondary rocker arm B.
If the intake secondary rocker arm A moves freely, go to step 5.
If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, then check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
Repeat step 4 on the remaining intake secondary rocker arms with each piston at TDC. When all the secondary rocker arms pass the test, go to step 6.
Check that the air pressure on the shop air compressor gauge indicates over 400 kPa (4.0 kgf/cm2, 57 psi).
Install a 10 x 1.0 mm adapter to the inspection hole, then connect the air pressure regulator
With the specified air pressure applied, move the intake secondary rocker arm A for the No. 1 cylinder. The secondary rocker arm A and secondary rocker arm B should move together. If the intake secondary rocker arm A does not move, remove the secondary rocker arms as an assembly, and check that the pistons in the secondary rocker arms move smoothly. If any rocker arm needs replacing, replace the secondary rocker arms as an assembly, then retest.
First, your engine has rocker arms, if you have a 4 cylinder you have 8 rocker arms, and if it is a 6 cylinder you have 12 rocker arms. Now if it is indeed a rocker arm making the noise, the cause is most likely a bad lifter or a worn cam shaft.
1991 Golf has a cable clutch, the cable pulls up on the arm you see outside the transmission. the arm rotates a shaft in the very tail end of the transmission which actuates a rocker arm which pushes a pushrod that travels up the center of the transmission and operates the clutch.
very complicated right?
anyway, the rocker arm in the tail end of the transmission is famous for cracking along its' splines and jumping over the shaft.
go to the local vw dealer or jobber who specializes in german parts.
you need the rocker arm and the cover plate for the end of the tranny.
remove the clutch cable from the arm, remove the end plate and you'll see the rocker arm, unclip the shaft, remove old rocker arm, and replace. should cost a maximum of $30-40(can)
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