JoelsBuicks Posted June 4, 2011 Share Posted June 4, 2011 The coolant bypass valve for my '38 Series 40 engine is showing about a 0.1" gap around the seat area. The gap is very uniform and tells me that it isn't an artifact of corrosion but perhaps something like a rubber seal or something else missing? See the pics below - they show this gap, especially the pic of the inside view. Maybe this just acts likes an orifice during normal running; allowing an always present bypass of hot water back into pump suction? If so, I don't really like that thought but I guess it must have worked. Anyhow, does anyone know if what I've got is normal or should I modify it to close this gap?Thanks for your help and input, Link to comment Share on other sites More sharing options...
danhar1960 Posted June 4, 2011 Share Posted June 4, 2011 Mine are the same Joel. I'd leave it as it is. I believe they ditched the valve completely some time later and went to a fixed orifice of about 1/2" Danny Link to comment Share on other sites More sharing options...
Guest Grant Magrath Posted June 4, 2011 Share Posted June 4, 2011 Yeah, same !Cheers Grant Link to comment Share on other sites More sharing options...
JoelsBuicks Posted June 5, 2011 Author Share Posted June 5, 2011 Thanks for the help, I installed it today.Joel Link to comment Share on other sites More sharing options...
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