Alright so my truck is about to see 1,000 miles a week @ least and I want to make sure she's running top notch.

What does a tune up consist of other then changing air and fuel filters, and oil?

I need to do a coolant flush. But what else is there?

Make sure you get the air filter from Delco. I got one yesterday, and the quality seems to be really good. It has a better rubber gasket, it has the foam stuff around it on the outside, the filter media is folded many times more than on the other filters I have seen, and the diameter of the filter is slightly larger than that of the others. I got an oil filter along with it (PF1218), $20 in total. The Delco filters performed very well in the air filter study Spicer made a while ago, and you can see why.

Maybe check the fuel pressure to the IP. Grease the steering assembly, check the brakes and wheel bearings, take a look at the belts and maybe carry spares, check the alternator bearing.

What about checking / replacing the fuel injectors??

I know they are about 3 years old... Far as belts go i'm gonna have them all replaced. As they are old.

Truth is, these days on more modern vehicles a "tune up" in the traditional sense is a thing of the past. Used to be something you'd get done and it would actually make a difference, but that was in the days of big gas V8s with carbs and points and distributors, all of which had lots of adjustments. With fuel injected engines with electronic ignition there's not much tuning to be done. While the gas trucks of the era we're talking about still had carbs they did go to an HEI ignition which requires comparatively little adjustment. And the 6.2 is fuel injected... It is mechanical injection in contrast with the electronically controlled injection on most modern gas powered vehicles, but still fuel injected. Therefore, an actual "tune-up" isn't really needed, just maintenance tasks.

Splitting hairs I know... :rolleyes:

I wouldn't touch the fuel injectors as long as they're not causing you problems.

I honestly do not see a reason to buy one brand of air filter over another. If that's your preference fine, and yes, some may do a better job than others, but in the scheme of things I really do not think it is going to have a noticeable effect on engine life or performance as long as you run some type of filter and change it if it gets dirty. In extremely dirty conditions it might matter, but I don't see a different brand of filter making the difference between 250,000 miles and 500,000 miles.

Check all your brake lines, inspect the wiring, look at the brake pads and shoes. Definitely grease the u-joints. Check to make sure your rear axle is full of fluid... It's awful embarassing to be pulling apart a rear axle in a parking lot hours from home because the rear axle didn't have enough lube in it and the outer axle bearings ran dry :rolleyes:.

Check your steering for loose components. When you start putting a lot of miles on in a short period of time it's cheaper to have tight steering that to replace tires.

That's basically it, just look it over good, pick up the scheduled maintenance... Keep in mind when you start driving it a lot a bunch of little things you'd never think of will probably break... When I started putting a lot of miles on mine a whole bunch of little stuff started showing up. Just part of running an older truck.

How do you tell if the motor mounts need to be replaced? @ idle sometimes the whole damn truck shakes side to side. (driver to pax).

You would have to get in there and inspect the mounts... They are rubber mounted, you can usually tell pretty easily by looking.

The injectors have 210k on them Do you think I should drop the dough and change em out or wait?

The Pump has around 450k. In May i'm planning on replacing the Injection Pump as PM.


You guys are great here!

450K on a DB2? You sure about that? Might want to contact the smithsonian...

You put over 200K on in less than 3 years? Wow, you do drive a lot. Depends... Does the engine sound good? Does it have a miss, run rough? If not I'd leave the injectors alone myself... If it ain't broke don't fix it.

If nothing else, it's more quiet with the Delco filter, and it's a really cheap upgrade. They can't be much more expensive than the crappy Fram filters, maybe $4 more. If they perform better, they might last longer and/or save fuel and pay for themselves.

The rough idle may come from insufficient fuel pressure/flow to the IP. Installing an electrical lift pump cured that for me; later I upgraded from the model 80 filter to a spin-on type and it got even better.

i have a k & n airfilter on mine, kinda pricey but worth it.

K&Ns let more dirt go through the filter, so I'm staying away from them for Diesels --- all the more so for offroad driving where you can get a lot more dust than on the road. But I tried them on gassers and they made a nice improvement.

by 450k do you mean kilometers or miles?

i've read that you should change injectors every 100k miles. most people on here seem to be getting way more than that though.

1000 miles a week!! i thought i drove a lot :)

Us Miles :)

I'm not sure on the records as I look though them now. But the pump has a shitload of miles on em for sure. I bought the truck in Aug with ~430k miles


the Truck does have a miss once and while if I run it 80mph down the highway for more then 5 miles a t ime once i drop it to idle. but normally she does not miss.

I very seriously doubt you have the original pump on that truck... I wouldn't replace it either. I mean, if you want to spend $500 on a part to replace one that isn't broken, be my guest, but I think it's a waste of money. At least without knowing the condition of the pump right now...

Try this. Start the engine a leave it idling (fast idle/cold advance off). Open the hood. Take a long flat blade screwdriver and reach down on the passenger side of the injection pump, way down in the engine valley. You'll see an aluminum arm about 4" long that goes down from the throttle shaft and pushes on a plunger. Take your screwdriver and push that in. You should hear a distinct change when you do this. This tells you that the advance piston is still working, at least to some extent, and that's generally the first thing to fail. Even once those quit the thing will keep running for a long time though...

i have a k & n airfilter on mine, kinda pricey but worth it.
I just put a K&N air filter on my truck at 39000 miles made a huge difference in response an d power (could have just been old filter was so dirty though) still like the new filter.

I just put a K&N air filter on my truck at 39000 miles made a huge difference in response an d power (could have just been old filter was so dirty though) still like the new filter.

yeah, mine was a huge difference also. the next week after the k&n i put flowmasters on, and sectioned out the aircleaner housing for more flow. definitely got even more power gain there too.

I also doubt it is the original injection pump. The original pumps on those motors had a governor retaining ring that disintegrates with the ULSD........mine went a couple of summers ago. As far as the injectors, if it is cold and you start it, notice white smoke/missing, might be time for new or rebuilt ones, otherwise, leave them alone. I am in the process of pulling my motor right now for new gaskets, injectors, and whatever else I discover it needs while in the operating room.