First 360 / 390 Build
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Mountain Pass
Joined: Sep 2024
Posts: 178
Likes: 32
gotcha. I figured it was too far advanced since the start up. Haven't gotten a timing light on it yet.
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Mountain Pass
Joined: Sep 2024
Posts: 178
Likes: 32
It has some blowby still, but not quite as much as before. The PCV seems to take care of it. I guess its semi normal, I just had the walls honed and deglazed, I'd be more concerned if I did a full rebuild and checked every ring gap and everything. If it runs and doesn't make super horrible noises I think I am just going to run it. I ran it down the road today and I think I may do an oil change soon and fix the thermostat housing leak.
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Mountain Pass
Joined: Sep 2024
Posts: 178
Likes: 32
Heres another video. Fixed thermostat leak, put in 180 thermostat, runs cool and does't overheat. It seems as though the blowby has went away, maybe rings were just still trying to seal. It has a little bit of a exhaust leak, but me and my buddy really had to handle the hell out of the exhaust pipes and gaskets to get them on so I'm not too worried about it. You can't even really hear it in the video. It carries 60 psi of oil pressure driving and like 40 on a hot idle. Seems as though I've done everything I can do for it. Just gotta hope.
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Mountain Pass
Joined: Sep 2024
Posts: 178
Likes: 32
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From: GA
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Mountain Pass
Joined: Sep 2024
Posts: 178
Likes: 32
Truck still going smoothly. Exhaust leak is semi fixed since I put the rest of the exhaust on that runs to the back of the cab instead of dumping right under the motor. It cleared up most of the sound I was hearing. Truck cold starts at about 65 PSI of oil pressure and when warm idles with about 40. I've recently been fighting the carb gasket to get it to seal / get the right one, and whenever I go down the road smoke / steam pours through the vents.. the blower motor doesn't even work.. i may bypass the heater core and see what happens. It doesn't really have a smell, it doesn't really smell like somethings actively burning.
Laughing Gas
Joined: Oct 2022
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Is your truck factory AC? If not the cores are readily available and easy to change. I fought my carb for a bit as well until I got it all good to go. I had leaks at the base. I also fought every single heater hose. They all leaked and needed tightened a few times.
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Mountain Pass
Joined: Sep 2024
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No factory AC, yeah just one side never wants to seal
Fleet Mechanic
Joined: Mar 2013
Posts: 1,661
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From: Montana
Congrats on your first successful rebuild.
If you have steam coming out from heater box, it's likely leaving a greasy film on your windshield too that's going to be a pain to clean. If that's the case I'd bypass heater core immediately. You don't want to be breathing those fumes.
I'm wondering if the base of the carb is warped since it sounds like only one side is leaking. Might try to locate a thicker insulating gasket, which will also help avoid vapor lock when temps get warmer this summer.
Beyond that, sounds like it's time to just drive and enjoy it.
If you have steam coming out from heater box, it's likely leaving a greasy film on your windshield too that's going to be a pain to clean. If that's the case I'd bypass heater core immediately. You don't want to be breathing those fumes.
I'm wondering if the base of the carb is warped since it sounds like only one side is leaking. Might try to locate a thicker insulating gasket, which will also help avoid vapor lock when temps get warmer this summer.
Beyond that, sounds like it's time to just drive and enjoy it.