Overhead? overhaul?
i was recently speaking with another driver about my truck..i have a 2000 freightliner 660k miles(detroit 60 series) and about the past year i noticed it just doesnt pull the same like it use to...... he has a truck with over 1million miles and recommended i get an --i believe he said an "overhead"? what exactly does this do and whats the cost? he also said it costs about 400$...... its nothing wrong with engine, i just had cam replaced and some other work done on it, and never have had a major problem out of engine.... thanks
and for arguments sake-- i do have PM's done every 12k miles, among other things, so i do take care of truck :D any info will be greatly appreciated |
"Overhead", generaly means ajusting valves, injectors, and jakes.
Don't know about Detroits, but CAT recomend it every 150,000 miles. The last one i did for my Acert C-15, was $336, at CAT dealer. |
thanks alot for the info...ill call detroit diesel to see what they recommend and charge......thanks!!!
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You say that you just had the cam replaced? If this job was done properly, a valve / injector set would have been done during re-assembly. Was there any change in performance following the cam change?
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yes.... i did have a valve/injector done(replaced) also...ive noticed a little... but ive also noticed my fuel mileage has improved also..but as far as pulling up a hill -not much
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Marcel have you had the charge air cooler tested? Mine was leaking very bad. Put in a new one and the same bridge I had to down shift two gears now I go over in cruise control.
The charge air cooler isn't something you notice all of a sudden it is real gradual. Once I got the new cooler in I then noticed a pin hole in one of my cooler connection hoses. I thought I had a whistle under the hood. Put all new hoses on and I went from my mileage going up and down from 6.0 to 8.0 to a steady 8.4/8.5. And I am real happy with the power from the 430hp DD |
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what exactly does charge air cooler do? |
Charge aair cooler is the air to air cooler for the turbocharger. It is the radiator mounted in front of the main radiator of the truck. If there is a leak in that it will cause a loss in power and feul milage to name a few probelems.
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If your losing pulling power there just about has to be a small change in fuel economy. With a diesel engine fuel and power go hand in hand.
If you had a valve or injector replaced and no overhead was done you better find a new mechanic. |
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