This is kinda frustrating... pulled a 454 that produced too much heat now I have an engine that doesnt seem to produce enough. On cool mornings there is so little heat from the heater core untill I drive it awhile (1/2hr) that one of these days I will be an icecicle before I get to work...
I installed a new 195 degree NAPA thermostat the other day and it seemed to help a little but not enough (isnt the themostat supposed to be "special"?) The one for the powerstrokes and the cummins engines are made special.. this looks like a "will fit". I looked for bubbles in the water with the engine running, that would indicate that there might be a combustion leak that would prevent good heater operation ( a notorious malady with 6.2 diesels) and found no bubbles... what next?
The heater hose routing runs from the head crossover, to heater core and then to radiator... exactly the way it shows in the GM shop manual. Why is GM different? Most everyone else, including GM in the "old days" goes from water outlet to heater core and back to water pump. It seems like the heater core is drawing water from the engine via the radiator, cooling it through the heater core and returning it to the radiator... without ever allowing the water to get fully "hot". There is a pipe plug on the water pump that would allow a return hook up there... can this , should this be done? will it help?
Suggestions an Comments appreciated! [img]smile.gif[/img]
Scott K<br /><br />\'79 Chevy K30 Crew Cab Dually from Arizona, Resto Project with conversion from 7mpg 454 to \'82 6.2 J. Pulling fact SM465, NP205, 4.56 cogs, Dana60 frnt, Dana70HD rear. Looking for good used turbo and OD