Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Ok, exactly what is your question about the dowel pins?
Have you removed the water pump from the engine yet? There should be a locator dowel pin on either side of the block that the water pump bolts to.
I use flexible hose clamp pliers to loosen the clamp and slide it back some and then pull the thermostat housing with a side to side twisting motion to free it from the hose. I have attached a photo of the type of pliers I am referring to
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