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Cooling? #141031 04/14/09 10:05 AM
Joined: Feb 2009 Posts: 76 Kentucky j1932 OP Shade Tree Mechanic
OP j1932 Shade Tree Mechanic Joined: Feb 2009 Posts: 76 Kentucky	I have a 1934 GM truck engine that I am rebuilding my question is next to the oil pump about midline on the block there is a 3/8 threaded hole. If I blow compressed air into the hole I feel air in the cooling system. What is this hole for, can it just be plugged? Thanks Jay

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Re: Cooling? j1932 #141032 04/14/09 10:10 AM
Joined: Mar 2008 Posts: 287 Healdsburg, California WinoWally Backyard Mechanic
WinoWally Backyard Mechanic Joined: Mar 2008 Posts: 287 Healdsburg, California	I believe it is for a coolant drain cock. 1936 Low Cab Pickup

Re: Cooling? j1932 #141033 04/14/09 10:11 AM
Joined: Feb 2009 Posts: 76 Kentucky j1932 OP Shade Tree Mechanic
OP j1932 Shade Tree Mechanic Joined: Feb 2009 Posts: 76 Kentucky	That makes sense. Thank you Jay

Re: Cooling? j1932 #141047 04/14/09 04:26 PM
Joined: Apr 2002 Posts: 3,008 Likes: 1 Dayton/Beavercreek, Ohio Back Roads ChatMaster - 3,000
Back Roads ChatMaster - 3,000 Joined: Apr 2002 Posts: 3,008 Likes: 1 Dayton/Beavercreek, Ohio	When you say it is 3/8 are you sure it is not 1/8 NPT? Don't mess up the threads. See you Touring the Back Roads Joined VCCA June 1, 1961

Re: Cooling? j1932 #141050 04/14/09 05:27 PM
Joined: Feb 2009 Posts: 76 Kentucky j1932 OP Shade Tree Mechanic
OP j1932 Shade Tree Mechanic Joined: Feb 2009 Posts: 76 Kentucky	Yes, it is an npt thread. Thanks for the warning. Jay

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