Posted by billy-jay [173.245.55.171] on Thursday, December 01, 2016 at 12:48:29 :
my 54 T-137 engine has no external bypass on pump or thermo housing..I thought the internal bypass engine had the hump head but mine is straight..there is a hose from top of pump to heater...from all I can tell...this is the original engine..jim
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