HOrnbrod Posted March 5, 2009 Posted March 5, 2009 This just started yesterday after running some errands around town. Engine temperature was normal throughout. After parking the truck and it cooled down, I popped the hood to do something and noticed the upper hose was flattened end to end. I cracked the rad cap, heard some air released, then the hose went back to normal. This hose is almost new. I stuck on a spare cap I had, took a spin, and the same thing happened again after cooldown. The line from the rad cap flange to the overflow tank is unrestricted, and this is a closed cooling system. Going to pick up a new cap anyhow, but what else could cause this? Thermostat?
bigd44889 Posted March 5, 2009 Posted March 5, 2009 bingo thermostat or hose bad and u stated it is a new hose
vaquaro Posted March 5, 2009 Posted March 5, 2009 You did put the re-inforcing coil back in the new hose....right ? :shake:
maddzz1 Posted March 5, 2009 Posted March 5, 2009 Like said, I'm prettyy sure there is a spring/coil that you have to take out of the old hose and put in the new one. I had to go thru the trash to find the old hose to get the coil out of it. I thought it was only the lower hose that needed the coil tho.
HOrnbrod Posted March 5, 2009 Author Posted March 5, 2009 Nope, no coil in the upper hose. Had an old one laying around too w. no coil either. Lower has the coil though..........
bigd44889 Posted March 5, 2009 Posted March 5, 2009 take therostat out drive to part store and buy a new one drive home see if it colapses put in new one test again :smart: :yes:
HOrnbrod Posted March 5, 2009 Author Posted March 5, 2009 Had to order a new regulation stat from the stealer and it will be here tomorrow. So I'll change that, replace the upper hose (it feels mushy even though it's fairly new), replace the cap, and the coolant. Hopefully this will correct the problem..........
fiatslug87 Posted March 5, 2009 Posted March 5, 2009 this is a closed cooling system You put the closed system into your '91? I've only heard of people switching from the closed (RENIX) to the open system (HO).
HOrnbrod Posted March 5, 2009 Author Posted March 5, 2009 Drove it all around town again today, temps ran normally and no more hose collapsing. WTF? Well, I'll pick up the new stat tomorrow and flush, replace the new parts and add new a/f. Prolly needs it anyhow - been a couple of years.
bigd44889 Posted March 6, 2009 Posted March 6, 2009 stat was stuck and poped loose replace it u should be good :cheers:
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