Tune up, air filter and maf/tb cln up

[Happy Hummer]

Well today here in WI. in the SE corner of the state we hit high 40's hoooooooray! lol...:emb::thumbs:

Time for some much desired preventative maintenance of the tune up variety.

75,900 miles

5 41-103 sparky's check
1 new acdel filter check
MAF cleaned with correct spray check
TB cleaned with spray check
Verified the breather hose under resonator was not dry rotted completely check (it does have some starting tell tale signs of cracks)
The wire loom covering under the resonator if dry rotted :no::sigh: to the point of crumbling. I'm guessing from the engine heat?
It was necessary for the 3M black tape to be brought out to cover the wires up to help protect them some.
The air filter was actually needed as the one in the H3 was cracked and dry rotted at the ring portion which seals it to the air intake inside the box.
Whack thing is all this was replaced about 25-30K miles ago.
Spark plugs which I took out of the engine looked good but the H has been running rough so a tune up was good insurance...:thumbs:

All in all it didn't take to long and its now off my mind. Next to repair, replace the front bumper.

 

[Chimpy]

I ordered an oil catchcan yesterday for my 06. I did eveything that you just did, last year. My Hummer ran really good.... for awhile. It started choking when coming to a stop and idling erratically. I cleaned the throttle body again and found oily liquid in the small section of hose/duct that connects to the throttle body. Seeing oily liquid again and having read here about this being a common problem, I ordered a catchcan. This is something you may want to consider.

 

[alrock]

The cracking was just in the wiring cover? I'd say normal. Always feels good to put in some maintenance.

I have not gone the catch can route despite oil going into the resonator. 170,000 miles and the engine still pulls strong. While I did have some of the symptoms Chimpy talks about, it was a bad head that I had - I'm not aware of that being an oil issue. Heck, in some ways I see the "mosquito fogging" that can occur out of the tailpipe to be helpful in identifying a bad head. Yeah, oil burning isn't great but I haven't seen the harm yet. I've read the catch can arguments but haven't been swayed.

 

[Chimpy]

The head isn't the issue with mine. The build number was plenty high enough to put it out of the range of the bad heads from factory issue that happened on the 06 models. After I have cleaned the throttle body, it runs like a champ afterwards. Looking at the catch can more as a preventive measure than a repair at this point. After I get the can installed, I will review it after a few hundred miles or so of driving. My 06 is at 137K.

 

[alrock]

The head isn't the issue with mine. The build number was plenty high enough to put it out of the range of the bad heads from factory issue that happened on the 06 models. After I have cleaned the throttle body, it runs like a champ afterwards. Looking at the catch can more as a preventive measure than a repair at this point. After I get the can installed, I will review it after a few hundred miles or so of driving. My 06 is at 137K.

Mine was an '07 - head issues on these things occur outside of the "VIN range" H3s.

I see the examples of the oil caught in catch cans but I'm unaware of the harm caused by not having a catch can.