superih Posted January 25, 2017 Share Posted January 25, 2017 Taking the head off the 856, can anyone give me the valve protrusion specifications? Link to comment Share on other sites More sharing options...
Charlieu Posted January 25, 2017 Share Posted January 25, 2017 Valve protrusion for the Intake valve is Flush (= or -) .0065 Valve protrusion for the Exhaust valve is .0815 - .0945 After grinding max allowable recession for the Intake valve is .0225 After grinding min allowable protrusion fir the Exhaust valve is .0655 These specs came from the GSS1346G Service Manual Link to comment Share on other sites More sharing options...
Dan Robinson Posted January 25, 2017 Share Posted January 25, 2017 Charlie beat me to it. Make sure when the machine shop does the valves, that they are at the very top of the spec. Intake=.0065 Exhaust=.0945 Even if the valve are within spec but on the low end it still effects how well it starts in the cold. Had one bite us in the rear once. Link to comment Share on other sites More sharing options...
superih Posted January 25, 2017 Author Share Posted January 25, 2017 Okay, thanks a lot guys. Link to comment Share on other sites More sharing options...
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