Tams50 Posted September 1, 2019 Report Share Posted September 1, 2019 Hello, my new exhaust valve guides were not counterbored. Anyone know the dimensions ? Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted September 1, 2019 Report Share Posted September 1, 2019 if you are talking of the counterbored ends of the guides...I question your very guides you seem to have as they are ALL cupped by application and depending if used on exhaust or intake determines the relationship of the counterbore Quote Link to comment Share on other sites More sharing options...
Tams50 Posted September 1, 2019 Author Report Share Posted September 1, 2019 The old exhaust guides shattered. My new parts came from Andy Bernbaum. I c' bored them .500 deep x .375 to clear .020 over valve stems. Then reamed the guides to .343. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted September 1, 2019 Report Share Posted September 1, 2019 I guess I am now totally puzzled as to the why you ask dimensions when you seem to already have the guides counterbored by you and reamed for the valves stem size....BUT it is good you making headway.... Quote Link to comment Share on other sites More sharing options...
Tams50 Posted September 1, 2019 Author Report Share Posted September 1, 2019 I'm a crusty old anal machinist and was hoping to get an an actual dimension from someone. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted September 1, 2019 Report Share Posted September 1, 2019 not sure where you would find that data except that you take it from an original existing guide.....the disturbing fact is that you got some that were not as design...are these being passed off as originals and yet need this attention to detail and some here have had the cupped guides and installed them upside down...they would not have even suspected anything wrong on looking I am sure... Quote Link to comment Share on other sites More sharing options...
Tams50 Posted September 1, 2019 Author Report Share Posted September 1, 2019 Ply Adam's, could you direct me to a reliable source for new parts? Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted September 2, 2019 Report Share Posted September 2, 2019 I wish I could.....it is a shop around....and for the most part our members here often post the better buy/product in that regard this forum is a fair clearing house for what is the true value. Quote Link to comment Share on other sites More sharing options...
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