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Old 02-27-2012, 11:55 AM   #1
pickupman96
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Join Date: Sep 2008
Location: Danbury, Ct
Posts: 49
Coolant push out of the radiator?

On 89 gmc 1 ton keeps pushing all the coolant out. I will fill it up, put the cap back on and it will push all the coolant out of the system in a couple of days. Not just some, it will blow it all out. With the cap off and it running it will suck it down 3-4 inches and then spit it back out the neck. Im going to go put a new t-stat and rad cap on it right now but what else could it be and why. Thanks in advance for the help.
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72 Shortbed, fleetside, 4x4, 307,4spd.
55 second, 350, 4spd, almost done
77 K-20, 454, 4spd, plow truck
96 K-1500, 6 inch lift, 178k still going strong
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