Just about to turn over 309K on my 99 7.3.

I am transplanting an 87 300 with 77K miles into my 73 that had a 360. The frame is from a 79 f250/351M.

Doug

 

I've heard all those old Jimmy/Detroit jokes, but I loved the things! They were not for the feint of heart though. Running the rack was something that could not be written in a service manual. You had arrived as a diesel mechanic when you could do a good job of running the rack.

For their day they were a great piece of technology. Being a two cycle, they made very good power for their weight. Times change. Now we have electronic fuel injection on diesels too. Such decadence!

 

You really arrived when you were intimately familiar with the "Jesus" pin....

 

google 540,000 miles grandma....and see what you come up with.

 

204,000 on my 95 F150 300 5 speed. Doesn't burn or leak oil and tranny shifts great. The EFI 300 was definately one of Ford's better ideas.
YMMV
rikard

 

65,000 on my 94 300

 

r u sure that's not 165,000 or 265,000.

 

i have another 420,000 on mine, but the rings are shot. Hoping to get another 420,000 on the rebuild.
__________________________________________________ _______________

81 F100, 300 i6, 3 on the tree, all origional (for now)

Its only illgeal if you get caught!

 

236,000 on my 92 f150. burns no oil.
Just put in gas and drive

 

I think I got the bum end of the deal with my 300.
Only 125,000 and I already have serious blow by and
really low compression. I've considered that it may
actually have 225,000, or 325,000, but I have a lot of
records that don't suggest that's the case.By the way,
it still has some pep and runs like a sewing machine.

Anyway, I'm affraid I'm scorching the cylinder walls with
the bad rings, so a stock rebuild is in it's near future.
I wish I knew how it wore out with so few miles. I guess
since I have only owned the truck for 1 1/2 years and 7,000
miles, I might never know. Same goes for the mileage question.

Murph.

 

I might never know
over rev w/no load? *^it for exhaust/manifold?

 

Murph, i would only be concerned that it was rebuildable. then i would do a good rebuild, and treat her right, then expect a good return on my investment, in the form of 200 plus thousand miles

 

326,728 on my 85 300. needs a valve cover gasket and a tune up . drive her 45 miles round trip every day .

 

How often do you change your oil?

 

15 years ago my 250 had 150000 on it shortly after that the speedo went out.
i am not sure where its at. ten years ago i did a compression test and it had about 90 in some and 70 in others.
i have worked it hard pulling cars hauling sand ect.
during the winter i put a ton 1/2 in it for traction when it snows and leave it there till its gone.
the old girl is still pumping (smoking) and uses 4 qts of oil a week.

i have another motor from a 95 fuel infected that i will put in someday.