My First Truck

I have a 05 columbia and the manual calling for an overhaul at 750,000. Check it carefully for air leaks, chock the wheel release the brake and go under there and search for air leak, check for oil leak while you under there.

 

Can't give a price range without knowing the year. What year is it? Look in the truck paper and see what similar trucks selling for

 

There is enough power out of that engine, the biggest issue would be what rear end ratio is tied onto that 10 speed and is it a 10 overdrive or 10 direct. With the right ratio, you can pull just about anything with 350 hp. Did that for a lot years, so 445 is enough.

The overhead needs run right away. The bull gear should be checked. The crankshaft damper needs to be changed. And an oil sample and dyno test will give you the rest of the story on how far along that engine is. There is no hard an fast rule on when an overhaul will be needed. That depends on how it was driven and taken care of. And like oc83baker said, check for air leaks and oil leaks and electrical wiring throughout the truck and check www.truckpaper.com for average pricing on trucks with the same specs and mileage as that one.

 

I seem to remember a castrated 350 mack did fine on the mountains out in the Rockies of Colorado and British Columbia.

 

The 650k miles means nothing with out knowledge of idle time. Idle time is going to be a kicker to how much maintenance you need to do. As above noted do the important stuff right off.

Plan on the cost at 750k or beyond (borrowed time) that you may have a inframe and or transmission.

 

either way,

If the manual calls out 750,000 for a major, then consider it a priority to plan this for the near future expenses. I'd go talk to a local shop and see what needs to be done to schedule it in and how much notice so you put it on your schedule not random.

 

At least the Detroit series 60 is an easy engine to rebuild and parts are lower priced than Cat or Cummins.