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Valve lash adjustment help needed

41K views 38 replies 12 participants last post by  brad j  
re; 1.6 litre 16 valve adjustment. The factory service manual does not explain where the feeler gauge is to be inserted to make the adjustment. There is a lot of advice saying to measure it at the cam lobe and rocker arm interface. This may be easier but if the Suzuki/Geo require it to be measured at the valve stem then the geometry of the rocker arm would make the gap way different at the cam/rocker arm vs rocker arm/valve stem. Anyone know for sure?
 
Mike, My FSM is for 1996 1.6 16 valve. The page you suggested does not deal with valve lash adjustment in that manual but rather installation of PCV, EGR valves etc. The adjustment is dealt with on page 14 and there is no indication where it is to be measured. So now you know.
 
It might be a bit of common sense, though. If you loosed the locknut on a valve, and then turn the adjusting nut, there is really only one place for your feeler gauge to go - in that space that the adjusting nut is, well, adjusting......;)
For about 100 years we have been adjusting valves by inserting a feeler gauge between the stem and rocker arm. If you want to use "common sense" it would be the same as "assuming". I asked a simple question based on prior experience and observing that the geometry of the rocker arm would yield a vastly different measurement between the cam and the rocker arm vs the rocker arm and valve stem. I only wanted to be sure I was doing it correctly. I realize it would be extremely difficult to use a feeler gauge between the valve stem and rocker arm. We are dealing with Japanese technology here and would not be out of the realm of possibility to use a dial indicator.