You are viewing our Forum Archives. To view or take place in current topics click here.
Questions about Diesel trucks.
Posted:

Questions about Diesel trucks.Posted:

EcoBoost
  • Prospect
Status: Offline
Joined: Oct 18, 20167Year Member
Posts: 660
Reputation Power: 255
Status: Offline
Joined: Oct 18, 20167Year Member
Posts: 660
Reputation Power: 255
So I recently bought myself a '85 Ford F350 Dually with the International 6.9 Diesel, T18 4 Speed manual transmission. Well, I'm not too familiar with diesels at all. The truck hasn't been on the road in 18 years, but it's been started every week and ran for an hour. Now, it drove fine to my house but that's as far as I wanted to take it for now until I figure everything I need to do it. now I am going to drain and flush all fluids and get everything fresh, (brake fluid, coolant, oil, ) is there anything else I should look into replacing? I took a look at the lines and hoses and everything looks fairly good except some return line caps which have dry rotted, and I'm replacing all that, but what else should I look at? Any well know problems with this model and / or engine? I appreciate any help with this
#2. Posted:
002
  • Gold Member
Status: Offline
Joined: Sep 25, 20149Year Member
Posts: 4,817
Reputation Power: 7282
Status: Offline
Joined: Sep 25, 20149Year Member
Posts: 4,817
Reputation Power: 7282
The 6.9 is a DINOSAUR as you know, but aside from general maintenance to my knowledge there isn't a big blow up piece. The only major issue (and I don't remember if it was the 6.9 or 7.3 IDI, but it was one of the IDI's) had some cast issues in the blocks so some of them would crack. If it's got higher mileage you probably won't have that issue.. On a truck that old you're looking to make sure all your rubber lines are good, hoses aren't cracked, wires aren't exposed, etc. Basically just general wear items.

One big thing since this truck isn't a driver is that tells you that the grease in your fittings probably dried up / is no good. Go to all your U-joints (there will be 2 on the drive shaft on either end, and each end of the axle) and see if it has a zerk fitting. If it does, throw some grease in there. Same thing with tie rods and ball joints, basically spend some time under the truck and grease everything with a zerk. Also with any used diesel check your glow plugs and fuel injectors, those are your biggest failure points.
Jump to:
You are viewing our Forum Archives. To view or take place in current topics click here.