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Well, here goes guys, I just installed headers on my 1977 F100 w/351W, and I started it and annoyed the neighbors for a while, drove it down the road (which was a retarded move because I forgot I had left several tools and an extra carburetor under the hood unsecured, but luckily nothing fell out) and when I parked it, it had been running UBER hot, and there was a boiling sound coming from the engine. I checked the radiator, and it was a little low, but not that bad, was this what was causing the boiling sound in your opinion? Because it kinda sounded like it was coming from underneath a valve cover, but its kind of hard to tell where a low pitched bubbling noise is coming from when under a truck hood.
Any info will be greatly appreciated as always! Thanks guys!
It shouldn't have gotten hot enough to boil the coolant in the engine from a short run like that. If there's air in the system then it can make a boiling sound. If the engine hisses when you start it up I'd say this is the problem. Otherwise I'd keep an eye on the temp gauge. If the heads aren't getting hot then you're fine.
Yeah, it only happened that one time, it has never done it again, and seems to run cooler now. Thanks. However it does sometimes hiss when I turn the engine off, from the drivers side, around the power steering.