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Aluminum water pump housing mod #853493 11/14/10 05:46 PM 11/14/10 05:46 PM
Joined: Aug 2003 Posts: 7,063 Indiana maxie OP master
maxie OP master Joined: Aug 2003 Posts: 7,063 Indiana	I have an aluminum waterpump housing that is off of an original 1965 A990 car. If you look down through the thermostat hole there are two areas I guess would be the way to say it. In the back section which would be the block side there is a hole drilled and tapped with a pipe plug in it with a 1/8 hole drilled in it. What is the purpose of this? It is creating a hole that allows coolant to do what?

Re: Aluminum water pump housing mod [Re: maxie] #853494 11/14/10 06:12 PM 11/14/10 06:12 PM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	I would not mod or cut-up a A990 WP. I say SELL IT and just buy a repop and use that.

Re: Aluminum water pump housing mod [Re: BeEtLeJuIcE !] #853495 11/14/10 06:16 PM 11/14/10 06:16 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: I would not mod or cut-up a A990 WP. I say SELL IT and just buy a repop and use that. home of the Sox and Martin Hemi Duster

Re: Aluminum water pump housing mod [Re: HEMIFRED] #853496 11/14/10 06:17 PM 11/14/10 06:17 PM
Joined: Aug 2003 Posts: 7,063 Indiana maxie OP master
maxie OP master Joined: Aug 2003 Posts: 7,063 Indiana	If you read the post it states that is already modified. Was that way when I got it.

Re: Aluminum water pump housing mod [Re: maxie] #853497 11/14/10 09:01 PM 11/14/10 09:01 PM
Joined: Aug 2003 Posts: 43,200 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,200 Bend,OR USA	Those holes are to allow coolant to circulate when the thermostat is closed, I think I drill two 1/8 holes in my thermostats also for that very same reason, let the air out so I can fill the cooling system up completely without having to wait for the thermostst to open and it lets a small amount of coolant to circulate while warming up Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Aluminum water pump housing mod [Re: Cab_Burge] #853498 11/14/10 09:10 PM 11/14/10 09:10 PM
Joined: Aug 2003 Posts: 7,063 Indiana maxie OP master
maxie OP master Joined: Aug 2003 Posts: 7,063 Indiana	Quote: Those holes are to allow coolant to circulate when the thermostat is closed, I think I drill two 1/8 holes in my thermostats also for that very same reason, let the air out so I can fill the cooling system up completely without having to wait for the thermostst to open and it lets a small amount of coolant to circulate while warming up So more than likely they drilled a hole way to big and the car never warmed up and put a plug in it with a 1/8 hole in it. So the car would warm up.

Re: Aluminum water pump housing mod [Re: maxie] #853499 11/14/10 10:09 PM 11/14/10 10:09 PM
Joined: Feb 2003 Posts: 910 C CrazyD super stock
CrazyD super stock C Joined: Feb 2003 Posts: 910	the brass pipe plug prevents coolant from recirculating thru the block - it forces all coolant thru the rad. Common to cars running with no t-stat.

Re: Aluminum water pump housing mod [Re: maxie] #853500 11/15/10 10:27 PM 11/15/10 10:27 PM
Joined: May 2008 Posts: 1,131 Thigh-Gap Junction @ @#$%&*! New user name, Same old jerk!
@#$%&*! New user name, Same old jerk! @ Joined: May 2008 Posts: 1,131 Thigh-Gap Junction	Some coolant needs to flow though the block when the T-stat is closed so that the water heated in the engine can get to the T-stat and open it. The plug with smaller hole is just to minimize the flow that short-circuits the radiator.

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