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Reply to "Aluminum Water Pump Issue"

quote:
Originally posted by LF - TP 2511:

Did you just omit that choice inadvertently, or is there a reason you do not endorse it?

Larry


If the recirc passage is blocked and there is a thermostat in operation, then when the motor is cold & the thermostat is closed there shall be no circulation of coolant. The result is the heads are thermally shocked over and over each time the car is cold started. Doesn't your temp gage reading pulsate as the motor warms up? Some guys have gotten around this by drilling holes in the thermostat disk, allowing some recirc through the thermostat. Another method to avoid this would be to open the heater control valve before cold starting the car, coolant would thereby recirc through the heater core.

With the availability of the correct thermostat from Robertshaw there is no reason to botch up the advanced design of the 351C cooling system. So my preferred recommendation would always be to drill out the recirc passage and use the 351C specific Robertshaw thermostat.

I would have answered sooner but my computer & I are both fighting viruses. Smiler ho, ho, ho
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