Hummer Forums - Enthusiast Forum for Hummer Owners
See how these are not attached to the oil pan? This will work!
See how these are not attached to the oil pan? This will work!
0 2025/04/26 16:40:13
Before removing the oil pan, ensure that the engine mount is NOT attached to any of the threads that are attached to the oil pan. Otherwise, when you remove the oil pan, bad things will happen.
Before removing the oil pan, ensure that the engine mount is NOT attached to any of the threads that are attached to the oil pan. Otherwise, when you remove the oil pan, bad things will happen.
0 2025/04/26 16:40:11
0 2025/04/26 16:40:09
Draining the old oil. Look how nasty that stuff looks! LOOK AT THAT!
Draining the old oil. Look how nasty that stuff looks! LOOK AT THAT!
0 2025/04/26 16:40:08
Broken Water Pump Bolt - use a #2 left handed drill bit (from my kit listed previously) then the #3 bolt extractor and you will get this little guy out.
Broken Water Pump Bolt - use a #2 left handed drill bit (from my kit listed previously) then the #3 bolt extractor and you will get this little guy out.
0 2025/04/26 16:40:07
0 2025/04/26 16:40:06
Water Pump Housing - Looks clean!
Water Pump Housing - Looks clean!
0 2025/04/26 16:40:05
Water Test (3).
Water Test (3).
0 2025/04/18 22:28:32
Water Test (2)
Water Test (2)
0 2025/04/18 22:28:30
Water Leakdown Test - LOT of water draining from the intake valves. Adds another layer of confidence to the compression-leakdown test.
Water Leakdown Test - LOT of water draining from the intake valves. Adds another layer of confidence to the compression-leakdown test.
0 2025/04/18 22:28:28
Head Removed, and ready to be rebuilt.
Head Removed, and ready to be rebuilt.
0 2025/04/18 22:28:25
Another shot of the cylinder walls.
Another shot of the cylinder walls.
0 2025/04/18 22:28:23
Cylinder walls look okay! Might be able to get away with re-using these.
Cylinder walls look okay! Might be able to get away with re-using these.
0 2025/04/18 22:28:21
0 2025/04/18 22:28:19
Nasty, nasty looking head gasket.
Nasty, nasty looking head gasket.
0 2025/04/18 22:28:17
0 2025/04/18 22:28:15
Head off, broken studs removed. First glance, lot of carbon build up in the pistons.
Head off, broken studs removed. First glance, lot of carbon build up in the pistons.
0 2025/04/18 22:28:13
Here is the drill I used; recommend cordless (to not overspeed/break the bits). Take your time, and be patient, and don't apply too much pressure to the broken bits.
Here is the drill I used; recommend cordless (to not overspeed/break the bits). Take your time, and be patient, and don't apply too much pressure to the broken bits.
0 2025/04/18 22:28:12
Great Success! Got them all out!
Great Success! Got them all out!
0 2025/04/18 22:28:10
If the dowel pin gets in your way, removing the broken stud can be a little tricky, but still doable.
If the dowel pin gets in your way, removing the broken stud can be a little tricky, but still doable.
0 2025/04/18 22:28:09
0 2025/04/18 22:28:07
Start out a punch, then with a #2 drill bit (from the kit), then work up to a #3 drill bit. Be careful not to drop (too much) metal in the cooling passages.
Start out a punch, then with a #2 drill bit (from the kit), then work up to a #3 drill bit. Be careful not to drop (too much) metal in the cooling passages.
0 2025/04/18 22:28:05
This is the kit I used to remove the broke studs. Not the best, not the worst. But it works, and it's cheap!
This is the kit I used to remove the broke studs. Not the best, not the worst. But it works, and it's cheap!
0 2025/04/18 22:28:04
Out of the 12 head bolts, only 5/12 of them survived. Hey, thats 0.4166, which is at least a better average than most MLB players for their batting averages :-D
Out of the 12 head bolts, only 5/12 of them survived. Hey, thats 0.4166, which is at least a better average than most MLB players for their batting averages :-D
0 2025/04/18 22:28:02
0 2025/04/18 22:28:01
Timing Chain Area.
Timing Chain Area.
0 2025/04/18 22:27:59
If this little guy strips out on you (like it did for me), a pair of pliers or channel locks will do. Try not to gouge the cylinder head like I did.
If this little guy strips out on you (like it did for me), a pair of pliers or channel locks will do. Try not to gouge the cylinder head like I did.
0 2025/04/18 22:27:57
or like this. Again, don't gouge the cylinder head.
or like this. Again, don't gouge the cylinder head.
0 2025/04/18 22:27:56
like this.
like this.
0 2025/04/18 22:27:54
...or this little guy as well.
...or this little guy as well.
0 2025/04/18 22:27:53
Don't forget about this little buy when removing the cylinder head!
Don't forget about this little buy when removing the cylinder head!
0 2025/04/18 22:27:51
0 2025/04/18 22:27:50
0 2025/04/18 22:27:48
0 2025/04/18 22:27:46
Camshafts appear to be in good condition! A win!
Camshafts appear to be in good condition! A win!
0 2025/04/18 22:27:45
0 2025/04/18 22:27:43
More Carbon.
More Carbon.
0 2025/04/18 22:27:42
Lot of carbon buildup on the VVT sprocket.
Lot of carbon buildup on the VVT sprocket.
0 2025/04/18 22:27:40
0 2025/04/18 22:27:38
Valve Cover Removed
Valve Cover Removed
0 2025/04/18 22:27:37