A while back I replaced all the cooling system components - water pump, a couple of iffy pipes, all the coolant hoses, fan clutch - and then this year replaced my my leaking original radiator with a CSF. Well, all except one hose, the rear heater return that comes from the left side firewall to the tee at the back side of the head next to the temp sender.
Guess what? It ruptured at 70mph yesterday. Let it be a lesson that when you replace 40 year old parts, replace them ALL.
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I had been running at 185-195 with the original radiator - no matter the season or driving conditions, even pulling up long mountain grades. After I installed the CSF it ran at 195-200, and would climb to 210 on long mountain grades. I had blamed the radiator, not for being faulty but for not being as good as the original one. The new working theory that my friend Nate proposed is that it had been leaking for a while and slowly draining the coolant. With a compromise in the pressurization of the sealed system, it wasn’t sucking out of the overflow reservoir so everything looked normal. And the slight leak was going between a heat shield and the firewall so I couldn’t see it.
I was just leaving Classic Cruisers where I had been hanging out with
@POTATO LAUNCHER, so he and Nate ran the 5 miles down the road to bring me some hose and coolant to get me back on the road. Land Cruiser buddies are the best.
Bonus photos…
Dusk in Poncha springs.
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So much cool stuff at CC
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@Rockymtnreaper here’s the rest of the story on the CSF. It ran great all the way home after I replaced the hose and refilled the system. I was mostly around 185-195, and a couple times on long climbs I got 200-205. Much better than the 210-215 I was seeing on the highway before. As usual it was operator error.