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Jake Raby · 08-05-2009, 08:09 PM

Yep... Seen that a few dozen times...

Thats why changing the water pump at 60K is such a good practice..

Ensure that ALL the old pieces are removed from the cooling system/ engine.. One piece of the old impeller can block a passage inside a head/ cylinder and create a hot spot or air pocket that can lead to big issues.. I just repaired a cracked head due to this very occurrence...

And pull the heat exchanger as it is a collection point for this debris as well as the thermostat housing after the engine is back up and running and has circulated the coolant/ debris for a few cycles.

I find lots of engines with impeller pieces inside the heat exchanger.

08-05-2009, 08:09 PM	#3
Jake Raby Engine Surgeon Join Date: Aug 2008 Location: Cleveland GA USA Posts: 2,425	Yep... Seen that a few dozen times... Thats why changing the water pump at 60K is such a good practice.. Ensure that ALL the old pieces are removed from the cooling system/ engine.. One piece of the old impeller can block a passage inside a head/ cylinder and create a hot spot or air pocket that can lead to big issues.. I just repaired a cracked head due to this very occurrence... And pull the heat exchanger as it is a collection point for this debris as well as the thermostat housing after the engine is back up and running and has circulated the coolant/ debris for a few cycles. I find lots of engines with impeller pieces inside the heat exchanger. Last edited by Jake Raby; 08-05-2009 at 08:13 PM.