Hummer H3 100K mile things to keep an eye on.

[SGT-Wright]

I have a 2009 H3 base luxury that is approaching 100K miles. I am wondering on what parts I should start changing out before they fail in a bad place (in the woods). I am looking for a predictive maintenance parts list more than a stock "change oil and filters at ? miles and brake pads". I have been using Mobile 1 since it was born in 2009 and tried to keep up on the factory recommended fluid changes. Mostly highway miles with the occasional off-road for hunting or trips to Browns Camp to climb around the dirt and rock piles. I took it on the Rubicon but took a lot of the easier routs and not beat it up on the boulders.

The engine makes a rattling noise on cold start for a couple minutes and sounds like a diesel but gets quiet and sounds normal pretty quick. What causes that?

Thanks for any input. :thumbs:

 

[08H3]

I'd just check all the suspension components and replace if worn. I don't necessarily believe there's a need to change things out unless they are worn. I got 160K out of the drivers' side UCA, but am on my third passenger side, so it's really hard to say when a particular part will need replaced. Just keep an eye on everything.

The sound you hear on start up is likely piston slap. Somewhat common and not really anything to worry about.

 

[K0PIR]

I do the same, replace when worn. Look for things seeping. Do you have a good battery? Mine is about 4 years old and I'm close to replacing it. I wouldn't want to have a dead battery this time of year out on a trail.

Sent from my SAMSUNG-SGH-I337 using Tapatalk

 

[Chris Laun]

This isn't something thats make-or-break if it goes out on the trail, but the jounce stops for your front control arms might disintegrate like mine did, and give you all sorts of bump-steer and weird ride feel.

 

[alrock]

The noise is likely a bit of play in the timing chain, normal with the engine and the miles. Put the truck up in the air and check for play in the wheels. At 100K it would not be unusual to replace some or many suspension components, including upper control arms, lower control arm bushings, lower ball joints, sway bar bushings, tie rod ends or even a steering rack. As Chris said, make sure the bump stops haven't disintegrated. I wouldn't replace unless there's play in the components but it's time for a good look.

It's a good time to do a routine change of the belt, idler pulley and the tensioner. You won't necessarily get a warning before those fail and then you'll have a spare belt for the trail.

Check your radiator hoses for cracking or softening.

Beyond that it's fluids and plugs, yada yada yada. But I would also be more aggressive than "factory recommended fluid changes" especially since the factory doesn't have one for the diffs and the transfer case is a long time between factory recommended changes.

 

[justin94tt]

The noise could possibly be your lifters tapping.

 

[OmarOHelmy]

For 100K mileage, I would recommend also checking:
Gearbox oil
Diff oil (F/B)
Transfer case oil
Timing belt
Break pads
power steering oil
air filter
maybe clean the throttle body and air sensor

 

[rascole]

All good advice. Put it up on a rack or stands and move things around looking for loose or worn parts. May want to check the front diff cross member, easy to see and replace.

 

[SGT-Wright]

Thanks for all the good things to look at. Looks like I need to make a trip to the auto-parts store and start shopping for bushings and belts.

 

[ponchoV8]

Definitely a fluid change and a tune-up. My '09 broke 100K miles this year and it has been one thing after another from EBCM/BCM replacement, cracked radiator and now what seems to be a bad starter. Just did a tune-up and serpentine belt replacement, also replaced the deteriorated front diff. bushing with an Outfitter Design urethane bushing. Flushed the cooling system and replaced the upper/lower hoses and thermostat when I replaced the radiator. Now gonna tackle the starter then do a fluid change for the transmission and t-case....never ends. Good thing I still love my H3.