[Vwdiesel] Injector removal

[Justin and Michella Bennett]

Loren,
An impact gun to remove and install components in an aluminum head?  Boy 
that makes the A&P in me cringe.  Going out would be ok, but not a final 
torque going in.  What the gun is set to is not the torque you are 
applying.  The toques rises above the set value, the clutch releases and 
the torque drops, clutch engages and torques rises and the process 
starts all over again.  Every graft I have seen of the torque applied by 
an impact wrench has this saw look to it when the clutch releases.  When 
torquing sharp jabs are bad, especially in Al.  Have known mechs that 
have been fired for installing spark plugs in an engine with an impact 
gun.  I don't even allow my tire guy to install wheels with an impact 
gun.  I would suggest that part of the problem with cracking the head 
doing injectors is from using the wrong socket.  Use a good quality 6 
point socket that is broached just far enough to have full engagement of 
the wrenching flats.  Ideally a socket for this application will have a 
brass sleeve in the area where the b nut threads are that is very close 
fitting, this is to protect the threads on the end of the injector and 
to keep the socket from tipping on the injector.  Anyways if it works 
great.  Just be aware that you are trading one problem of cracking the 
head for pulling the threads from to high of torque.
Justin