2012 A Spacecab Odyssey

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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Sun Mar 12, 2017 3:51 pm

Okay, got it opened up. Had to go through 3 cameras to get this picture. My Nikon Coolpix croaked, I took yesterday's on my old-old trusty Kodak easy share 9but it's batteries died) so I stole the wife's Nikon (gotta get used to it :evil:). First pic shows opened up.
There has been some talk here about failed thrust bearings. Hadn't seen it first hand before so I'll try to document it for everybody. Pic 2 shows where the crank counter weight has contacted the block and cap. There were pieces of the thrust washer in the pan (block after I rolled it over). From what I understand, this engine will be junk now :cry:. If that's the case, I will go back to the "in frame overhaul" plan, but I will install the '93 pistons and rods, and use the #6 casting head if it checks out okay.
planet pictures 087.JPG
planet pictures 091.JPG

Comments sought and welcomed. Dennis
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1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

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Re: 2012 A Spacecab Odyssey

Postby bradzuzu » Sun Mar 12, 2017 4:00 pm

Hard to see any damage in the pictures Dennis , if it's not torn up though I would imagine that you could rebuild it ...
need to get the crank out and look at the bearing ride surface and see what the block looks like ... Is there an oversized thrust bearing available ??
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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Tue Mar 14, 2017 5:49 pm

Further pictures can be found in the general discussion thread "2.6 thrust bearings". Dennis
1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

The American dream is getting farther and farther away from the American.

If your wife has 5.00, and you have 20.00, your wife has...25.00

"Water is one of the greatest essentials of life. Without water, you can't make coffee."
DSUZU
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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Mon Mar 27, 2017 6:45 pm

Installing valve stem seals, valves and springs. This head was in real good shape. Valves good and tight in the guides, good seats and faces. I disassembled it and cleaned everything up, then I lapped all the valves and seats. Cleaned it again. My gasket set did not come with valve stem seals (? :roll:), but it turns out it is a set (Felpro) designed to go with a remanufactured engine (yet it has a head gasket). I was able to order a set of Fepro stem seals from Autozone (about 21.00)
This is the way I did it. I don't have a spring compressor for overhead valves (have 2 different ones for flat heads), so I made an adapter to use with a C clamp (see picture)
Note rack / block to hold valves and use of egg carton to keep springs, keepers together. It is important to keep everything together and reassemble where it came from.
I like the felpro seals because they have a nice retainer spring that snaps into the groove on the valve guides.
2.6 valve stem seals 001.JPG
2.6 valve stem seals 002.JPG
2.6 valve stem seals 003.JPG
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1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

The American dream is getting farther and farther away from the American.

If your wife has 5.00, and you have 20.00, your wife has...25.00

"Water is one of the greatest essentials of life. Without water, you can't make coffee."
DSUZU
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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Mon Mar 27, 2017 6:49 pm

This pic shows the heart shaped combustion chambers of the later 2.6 cylinder head.
2.6 valve stem seals 004.JPG
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1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

The American dream is getting farther and farther away from the American.

If your wife has 5.00, and you have 20.00, your wife has...25.00

"Water is one of the greatest essentials of life. Without water, you can't make coffee."
DSUZU
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Re: 2012 A Spacecab Odyssey

Postby shaggydoink » Mon Mar 27, 2017 7:06 pm

DSUZU wrote:I disassembled it and cleaned everything up, then I lapped all the valves and seats.


This is fascinating!! So yet another rookie question...... the lapping process in essence fills in any imperfections in surfaces of the valves and seats, right?

Jonathan
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Re: 2012 A Spacecab Odyssey

Postby hessmess » Mon Mar 27, 2017 7:43 pm

Boy this should be a running truck when you get it all together!
86 Trooper (sold to brother) wrecked and recycled
88 Trooper (recycled)
91 Trooper, 3.1, bored .40, Cam, 4.3 TBI, roller rockers, Fiero valve covers, remote oil filter, LSD, 2.25 Cat back exhaust, BJ flip, 5 speed conversion, Round eye conversion-retired and parts donated to the new 91
91 LS Trooper, 5 speed, 3.4, bored intake, LSD, rebuilt using parts donated from the first 91
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89 Pup LS Space Cab, 4X4, AMC head, Delta 260 cam, 2.25 cat back exhaust system, LSD
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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Mon Mar 27, 2017 7:44 pm

Actually, the opposite. The lapping compound is an abrasive which cuts the surfaces to a better match for each other. It is typically done with a suction cup attached to a stick and rolled back and forth between your hands (like starting a fire?) Dennis
1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

The American dream is getting farther and farther away from the American.

If your wife has 5.00, and you have 20.00, your wife has...25.00

"Water is one of the greatest essentials of life. Without water, you can't make coffee."
DSUZU
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Re: 2012 A Spacecab Odyssey

Postby chuffer » Tue Mar 28, 2017 2:15 pm

You are sure you got FelPro seals, right? Twice now I have gotten seals that are too tall and only realized after they got chewed up.

As for lapping, I assume there is a reason that I shouldn't do this, but I tape up the top of the valve stem to protect it and then chuck it up a hand drill. Fwd, rev, fwd, rev, a few times seemed easier than the fire-starter stick technique. In theory I suppose you could over do it this way or nick or bend the valves...
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Re: 2012 A Spacecab Odyssey

Postby DSUZU » Tue Mar 28, 2017 4:35 pm

Seals are same size as ones that came off it. I have lapped the valves with a drill as well (but didn't use tape). My "small engine" cup was barely big enough to clear the depressions in the valves (did use the drill a bit). Overall, I'm happy with the results.
Forgot to mention that this head had come off the engine with the blown head gasket, so it had been exposed to some moisture. This was one reason I wanted to tear it down and clean it and lapped to remove any stains / beginning of rust between valves and seats. Also to thoroughly insect valves and seats.
Overall goal: 1 stop excessive oil consumption. 2 hopefully, better gas mileage, 3 maybe a little more pep, but with the lightness of the pickup, even the Spacecab, it does better than a 2.6 in a Trooper.
Dick: saw where you were in Florida last week. If you ever go (come) over to the Bay Area (Busch Gardens), be sure to let me know. Dennis
1991 LS Trooper 2.8 V6 5 speed conversion (Sold)
1989 LS Spacecab 2.6 5 speed 4x4 manual hubs, Rodeo torsion bars, extended shackles, 2" lift, K&N airfilter (drop in), dump bed conversion, burgundy interior change, warn brush bar.
Previously owned: 1987 Trooper II LS, 1989 Trooper (parts only), 1994 Trooper 3.2 Auto, 1997 Rodeo 2.6 5 speed, 1993 shortbed pickup 2.3 (project - sold) 1992 Rodeo 4x4 LS (parts car, devoured by Spacecab needs) plus some 70 plus other non Isuzu vehicles over the years.

http://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060

The American dream is getting farther and farther away from the American.

If your wife has 5.00, and you have 20.00, your wife has...25.00

"Water is one of the greatest essentials of life. Without water, you can't make coffee."
DSUZU
I am the Stig
 
Posts: 6915
Joined: Fri Mar 16, 2012 8:28 pm
Location: St Pete Florida
Has thanked: 215 times
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Re: 2012 A Spacecab Odyssey

Postby hessmess » Tue Mar 28, 2017 5:40 pm

Believe me Dennis I will, this last trip was all scheduled out before I even left Nevada! My son is still living in the Jacksonville area so I will be back.
86 Trooper (sold to brother) wrecked and recycled
88 Trooper (recycled)
91 Trooper, 3.1, bored .40, Cam, 4.3 TBI, roller rockers, Fiero valve covers, remote oil filter, LSD, 2.25 Cat back exhaust, BJ flip, 5 speed conversion, Round eye conversion-retired and parts donated to the new 91
91 LS Trooper, 5 speed, 3.4, bored intake, LSD, rebuilt using parts donated from the first 91
viewtopic.php?f=15&t=81567
89 Pup LS Space Cab, 4X4, AMC head, Delta 260 cam, 2.25 cat back exhaust system, LSD
viewtopic.php?t=55081
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