new here and looking at an 86 f250 4x4

dgr

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Hello everyone.I've read a number of diesel forums and you guys really seem to have a great community here. Hopefully i can add some thing to it at some point.

86 F250 CC 4x4 C6 4.10 gears

I'm looking at purchasing the above truck. I just took it for a spin and here is what i could gather.

Claimed mileage is 136k. Right side of brakepedal pad is worn to metal but otherwise seems to be in good shape. Original owner. Truck has sat for last 8 years in a carport with infrequent use but was recently moved to sell it.

70 degrees today. Radiator level was below the top of the core. Let the gpc cycle, go out then another short cycle and it started immeditiately. I had depressed the pedal fully and it did not seem to be high idling. Ran well. I forgot what it was like to drive one of these. Mash the skinny pedal and there's no feeling of horse power but it just keeps pulling. Tach bounced but engine didn't sound like it was varying speed. Is this typical? 1-2 shift was, ehem, firm. Well, more jerky than firm.

Owner claims: IP pump was changed around 60k. Injectors are original. Glow plugs were changed. Alternator is a rebuilt. Radiator changed WITH a4 core. PS pump changed. Fuel selector works and tanks get full capacity.

Master cylinder looks fairly new. Has group 31 batteries-interstate workhorse but I couldn't find the date stickers.

I tried to feel for blow by but couldn't feel or see any with that giant fan blowing over the oil fill. I opened the air cleaner and there is a little oil in there but just a film.

Brakes- booster seemed marginal. It worked better when i ran engine at 1500 rpm-vacuum pump? Pretty good shake on braking. Guessing discs are warped.

AC-does not work. Last time owner turned fan on, it smelled like burning grass. System does not have a charge. He thinks it was converted to 134 8 or 10 years ago. So it could be anywhere from 100 to 1000 to make it work.

Suspension- Definitely a diesel truck. Only concern is the 3/4 inch gap between the front axle and the bump stops. Is this typical? I am guessing the winch bumper with the high lift and the winch aren't helping this. Oh yeah, it has a winch :score:

Body- I've seen 26 yo women in worse condition. Fairly straight with a few dents and a unique slice in the tailgate. Interior is wine. I hate the color.

Engine compartment had typical weeps but i didn't see any major leaks. I didn't notice any diesel leaks around the injectors or the return lines.

SCAs. I asked 7 different ways about coolant additives. It sounds like ask he has ran was 50 50 green. How concerning is this?. From reading, it sounds like worm holing happens around 200k. Ideally you run additive from the beginning but if you start using it before you get a hole, it should stop any progression. I can go back and test for SCAs now that we filled the radiator but he really had no clue about SCA additive. i do like gambling, just not where a 2k gamble can cost you 4k more.

Any thoughts? Anything i missed?
 

Tim4

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Sounds decent to me. I don't follow the 4k more part though.
 

PwrSmoke

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I have this exact truck! Mine just turned 140K and I've owned it since it was almost new.

Hello everyone.I've read a number of diesel forums and you guys really seem to have a great community here. Hopefully i can add some thing to it at some point.

86 F250 CC 4x4 C6 4.10 gears

Tach bounced but engine didn't sound like it was varying speed. Is this typical?

No, could be the tach sensor or a connection. Not a biggie.

1-2 shift was, ehem, firm. Well, more jerky than firm.

Could be a vacuum issue or the adjustment on the IP or a bad modulator.


Owner claims: IP pump was changed around 60k. Injectors are original. Glow plugs were changed. Alternator is a rebuilt. Radiator changed WITH a4 core. PS pump changed. Fuel selector works and tanks get full capacity.

Master cylinder looks fairly new. Has group 31 batteries-interstate workhorse but I couldn't find the date stickers.

I tried to feel for blow by but couldn't feel or see any with that giant fan blowing over the oil fill. I opened the air cleaner and there is a little oil in there but just a film.

Sounds good.

Brakes- booster seemed marginal. It worked better when i ran engine at 1500 rpm-vacuum pump? Pretty good shake on braking. Guessing discs are warped.

COuld be a few bucks here. Is the pedal really hard at low speeds and power assist returns at 1500? If so, hints at a vacuum leak which ties in with the shifting.

Suspension- Definitely a diesel truck. Only concern is the 3/4 inch gap between the front axle and the bump stops. Is this typical? I am guessing the winch bumper with the high lift and the winch aren't helping this. Oh yeah, it has a winch :score:

Sounds good.

That sounds about right. My truck doesn't much more than that with no winch.


SCAs. I asked 7 different ways about coolant additives. It sounds like ask he has ran was 50 50 green. How concerning is this?. From reading, it sounds like worm holing happens around 200k. Ideally you run additive from the beginning but if you start using it before you get a hole, it should stop any progression. I can go back and test for SCAs now that we filled the radiator but he really had no clue about SCA additive. i do like gambling, just not where a 2k gamble can cost you 4k more.

I didn't run any coolant additive for the first 10+ years I owned the truck. When I had the engine apart recently for head work, the inside of the entire cooling system was grey, clean and not rusty. If it had regular coolant changes at least, the odds are good.... but as you said you will never know. 6.9L are less prone to trouble anyway. $2K sounds like a good deal overall Pics?

One last question... what cover is the truck and what color are the "FORD" letters on the tailgate painted (assuming it's not an XLT with the SS cover.
 

dgr

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PwrSmoke,
Regarding the pedal. Pretty stiff at idle. A couple quick stabs makes it stiffer. Can definitely feel the PB is doing more for you when you increase the RPMs. I just love chasing vacuum leaks. It doesn't look too bad on this vehicle... famous last words.
Can you run your truck at 70 on the flats? It's kinda scary doing the speed limit in Kalifornia.

I included a pic of the tailgate lettering. I don't know if you can see but it is an XL. Color -- I'd say gray but I've called silver vehicles gray my whole life. Smoke on light smoke?
Thank you everyone for the input. Keep it coming.

Duh! Pictures or it didn't happen

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lindstromjd

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Sounds decent to me. I don't follow the 4k more part though.

I think he means he can buy the truck for $2k, but doesn't want to take a gamble when a new engine will cost him $4k.

Anyway... personally, I wouldn't be the least bit concerned about cavitation in a 6.9 (the cylinder walls were much thicker and the expansion from the heat was nowhere near as much as the 7.3). It looks like a nice truck to me.
 

PwrSmoke

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65 is my maximum sustained speed. It will do 70... running 3050 rpm and get 14 mpg doing it. My truck will do 80 mph wide open. It has a turbo kit, which might increase the top speed a little. These trucks were built for hauling and a 55 mph speed limit. If you want to fun faster, or get better mpg at high speed you'll need an overdrive or an overdrive trans conversion.

Been looking for a Warn classic winch bumper like that locally. Have the winch but no bumper.
 

Devon Harley

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Wow nice truck that's kinda like the 7.3 from the other day color wise. Also that fan will not blow the blow by away I believe that means you have none my 93 has non with 104xxx so ur good you mileage is possibly correct. Where in Cali are you I am gonna have a get together for in a couple months. Tryin to come up with 2 ideas and ask people what would be perfered. If no one prefers all set the date and hope others show up. Welcome to Ob again nice truck. How much did you get it for?
 

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