As the title states I have had a nightmare recently with the cooling system. I first installed a block heater which leaked, then replaced with a better version. Then the thermostat was bad so I replaced that. Next was the temp sending unit, which of course leaked (Memphis Equipment Company is a great business to buy from, they replaced the part with NO problems, highly recommended). After that the heater blower motor fried.Now the fan isn't engaging, because the water pump or something is screwed up! I did a search for the actuator and plan on rebuilding that, but that doesn't explain why the coolant isn't flowing. Yes I also looked through the TM's. Any suggestions for tests for no coolant flow would be greatly appreciated! Thanks in advance.