mikec03 Posted July 7, 2009 Share Posted July 7, 2009 I had a clicking noise from the engine on my 97 sub, 2.2 l, 145 K mi. It was very loud and I was hoping it was tappet noise. So yesterday, I pulled the passenger side valve cover and reset the valve gaps. I was hoping that I would find one or more way out of spec. But actually, I was disappointed to find all 8 valves only about 2 th. [.002 inch] more then spec. The intake valves are supposed to be 8 th +- 1 th and they were about 10 th gap, for example. I didn't think that much of a variance could account for the noise. But, surprise, resetting the gap to spec greatly reduced the noise! I never heard or read that such a small out of spec gap could make so much noise. Does this seem reasonable? Link to comment Share on other sites More sharing options...
Petersubaru Posted July 8, 2009 Share Posted July 8, 2009 my experience setting up my old volvo or vw ...2th larger then spec would make a difference...in my case I have to check the gaps when the motor is "hot" while my friends chevy has to be checked when the motor is "cold" Link to comment Share on other sites More sharing options...
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