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Hummer H2For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.
Got the crank dry fit in the block and bearing clearances checked, all still within production limits. Pulled it out and lubricated it the did final install. Also test fit the cam to verify cam bearings were straight the pulled it, lubricated it and slid it back in for the final time. Next is fitting the rings and installing the pistons.
Had some scored rocker arms so I opted for a new set of arms with the bronze bushings. The research I've done indicates they'll handle more load with less wear without the concern of needle bearing failure.
No, things on the H2 have slowed to a crawl,
Was working ever day but now down with shoulder surgery, once I get rid of this sling and pillow on my arm I should be able to start back on the engine and get it installed.
I'm ready to drive my H2
Little update;
Tried 2 sets of Hastings rings but they are under sized so ordered a set of OEM's. The Hastings have more clearance brand new then the used OEM's with 145,000 miles on them.
I've checked the bores and the piston skirts and all was good there but close to the service limit so with the clearance I have I've decided to coat the pistons with Dry Film Lube (Tech Line DFL-1) on the skits and Thermal barrier (CBC-1) on the tops. The pistons in the L92 have this coating from the factory on the skirts but has worn off to some extent, the new coating will add around .0005" to .001" after curing. The bore to piston clearance service limit with the coating worn off is .0028" and mine are at .0025" to .0027".
The OEM rings should show up in a few days so I can get them fitted and installed once the pistons are coated.
I'm still working with one arm so things are moving a little slow, hopefully in a few weeks I can get rid of this sling and pillow and things will speed up.
little rant with Alldatadiy,
they have incorrect service literature and there really is no way to contact them to let them know, I tried a while back to email them but no response at all.
also searching the net it seems that the info is copied and re-posted, you really have to watch some of this if not getting your info straight from GM.
rant off now
Mitchell may be a better option with the needed data at the OEM level,
Hand held blaster with Aluminum Oxide for the surface prep. Some of the pistons cleaned, baked to off gas and ring lands tapped off ready for blasting. The lower piston blasted and the top piston just prior, for comparison.
I was able to spray the skirts with the dry film lubricant today, next will be to let them air dry for a few hours then cure them at 300* for an hour. I coated the tops with the thermal coating (light grey) a few days back but had to wait for better weather to coat the skirts.
