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Trucks, Trailers and Hauling for Shows

1986 Ford 250 4.9l

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Old 11-18-2018, 07:10:59 AM
crank crank is offline
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Smile 1986 Ford 250 4.9l

Just picked up F250, It spent most of it's live on a air force base, It has a hydraulic lift on the back that works good. I did some work to her it was back firing, change plugs, tightened the carb, valve cover gasket, air filter and oil change ( rotella 15-40 ). Now she runs smooth, had at least three of these engines before never had a problem with them. (knock on wood ).[ATTACH][/ATTACH]
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Old 11-18-2018, 10:15:02 AM
78Loadstar 78Loadstar is offline
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Default Re: 1986 ford 250 4.9l

Never seen a 4.9 go bad. Body always went first.
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Old 11-18-2018, 04:22:07 PM
Wayne 440 Wayne 440 is offline
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Default Re: 1986 ford 250 4.9l

Put some Locktite on those carb fasteners, else you will be back there about every 3rd oil change. Those are good engines, I have probably put 400K miles on various similar trucks.
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Old 12-15-2018, 09:03:58 AM
Tracy T Tracy T is offline
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Default Re: 1986 ford 250 4.9l

just a few years newer they went with dual exhaust manifolds and multi port fuel injection, talk about waking up a sleeping beast! i am like every one else, never seen one go bad. the rest of the truck will fall apart before the motor goes. on a side note, doors that body style are damn near impossible to source should you need one.
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Old 12-15-2018, 11:58:24 AM
Monsonmotors Monsonmotors is online now
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Default Re: 1986 Ford 250 4.9l

I’m a veteran of working on these in the shop environment. My main complaint about the 4.9l is its weirdness. Weirdness translates to parts availability problems. I see 10 or more 5.0L/ 5.8l v-8s to one 4.9l 6 cylinder. Also, I’m not a fan of their multiple timing mark scheme. Very confusing.
I’ve done intake manifold gaskets on them so I know they go out.
Otherwise, good engine.
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Old 12-15-2018, 09:24:24 PM
slip knot slip knot is offline
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Default Re: 1986 Ford 250 4.9l

My 84 one ton had that motor. you will learn how to tighten the carb up. BTDT many times. lock tight would probably work if you pulled it apart to clean it all up.
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