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Tips for Rebuilding:
Just got the truck back running from the re-build. FYI - This may be useful to the next guy doing a re-build vs. considering a swap.
Here are the engine parts - order them a month in advance, some are hard to find & take a while to ship:
- High flow injectors
- AC-90 Glow Plugs (anti-seize lock-tite)
- PMD w/ remote mount cooler (I didn't need the extension harness).
- 18:1 low compression pistons w/ceramic coated crowns (& rings)
- Connecting rod bearings
- Dual idler gear drive timing gear (or chain drive if you don't want gear drive)
- Rod bushings
- Main bearing
- Camshaft bearings
- Gasket & seal kit (make sure it includes head gasket & guide pins for installing the studs or marked bolts).
- Front main seal
- Balanced rotating assembly
- Performance camshaft
- Port matched cylinder heads, intake & exhaust ports, ceramic coated comb
- ARP head studs (not TTY bolts) w/ Teflon loc-tite
- Stud & Girdle Kit
- New gaskets for head cooling kit
- 10 blade fan, clutch & high flow water pump
Other things I should have done, but didn't have time to get the parts are listed below:
- Turbo rebuild kit (journal bearings, retaining rings, thrust bushings, bearings, thrust collar and rings).
- Aluminum radiator (or at least have the existing radiator re-cored)
- New power steering pump, pulley w/ new hoses
- New coolant hoses
- High volume oil pump
- Driver's side engine mount
- AC hoses
- Oil cooler lines/connections
- Mechanical turbo waste-gate control
- Ceramic coated exhaust headers
- Glow plug wiring & connectors
- Hummercoat spray on sound deadening
Since I've driven it a few miles, I've noticed these differences:
- It's much LOUDER now when stomping on the pedal.
- It doesn't WHINE like it did before the engine really breathes.
- It is very SMOOTH and the truck doesn't vibrate or have near as rough of an idle.
- It REVS UP much more freely & faster.
- It STARTS UP very quickly and right at the initial turn of the key.
- It feels like quite a bit more pick-up (for a Hummer) - like driving a normal car vs. an underpowered 7,000 lb. snail.
- It's got a few leaks to take care of, but nothing major.
I'm driving about 600 miles this weekend out west, so break in should be fun.
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