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67motorcat · 03-07-2011, 08:20 AM

I did mine as well.
The funny thing is the 5/8 nipple on the firewall goes to the 3/4 nipple on the water pump.
And the 3/4 nipple on the firewall goes to the 5/8 on the water pump.

I wonder why GM did that

Folks need to be sure to get it the rite way.Use the correct diameter hose at the firewall and spread the 5/8 hose over the 3/4 nipple at the water pump.Less chance damaging the heater core that way.

I wonder how many people have going to the same size nipple both ways and if it would make a difference?The water control valve could be impacted with the flow of water going the wrong direction?

03-07-2011, 08:20 AM	#20
67motorcat Blown Cool Breeze Drives: 2011 Black on Black 2SS M6 Join Date: Jul 2010 Location: Pinehurst NC Posts: 1,027 View My Garage	I did mine as well. The funny thing is the 5/8 nipple on the firewall goes to the 3/4 nipple on the water pump. And the 3/4 nipple on the firewall goes to the 5/8 on the water pump. I wonder why GM did that Folks need to be sure to get it the rite way.Use the correct diameter hose at the firewall and spread the 5/8 hose over the 3/4 nipple at the water pump.Less chance damaging the heater core that way. I wonder how many people have going to the same size nipple both ways and if it would make a difference?The water control valve could be impacted with the flow of water going the wrong direction? __________________ 2011 Black on Black 2SS M6 Had a 2010 IBM 2SS M6 Enjoy life.Think of all the women on the Titanic who passed up dessert.