1986 Isuzu Trooper 2 Door, 30k Original Miles!

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1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sat Aug 17, 2019 12:25 pm

Hey all! Thanks for accepting me into the Isuzu clan.

I just stumbled upon a 1986 Isuzu Trooper with 30,800 ORIGINAL miles. This thing is absolutely mint. A old Russian client of my neighbor was the original owner and has had this thing garage kept since new. Unfortunately we all must pass, and my neighbor was his estate lawyer and bought it because she just thought it was to cool. She is in her mid 60's and just couldn't justify having it. Long story short she is now mine!

To say I am over the top with excitement would be a extreme understatement. This is going to be my daily driver / mild expedition vehicle. I am not looking to do any crazy crawling with it or anything. That being said I do want to do some basic mods on it. Ive done a fair amount of research so far so I have a decent idea of what I am getting into. I am definitely looking into recommendations from everybody though / would love to buy used parts if you have them. I read on expedition portal that only 12 ARB off road bumpers were released to America when this vehicle made its way over here. I am looking for one of those, or something similar if anybody happens to have one.

The trooper is currently at my mechanics getting its 34 year old service. It truthfully needs nothing, but still has all of the original belts and so on. Currently servicing timing belt, serpentine belt, all of the vacuum hoses were a bit dry rotted. Windshield was also cracked so getting a new one on monday. Servicing diffs and so on. The original owner has already switched back to manual locking hubs. I don't have any photos as of right now but will post a bunch for you all when I get it back.

Would love to hear opinions and see what everybody else has done if anybody has one of these older models.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby Ed Mc. » Sat Aug 17, 2019 3:13 pm

Congrats on a good find! Be sure to replace all the cooling system hoses. The thermostat is 180 degrees and must have a "jiggle" valve to help bleed air out of the system. The rig must be jacked up in the front (or placed on ramps) in order to "burp" all the air out, else it'll overheat and that's very bad for the head.

Hoses are critical 'cause you don't want them to blow and overheat the engine, then you'll be buying a new head. The twisted little heater core hoses at the driver's side of the firewall ALWAYS blow out and cause trouble!

Have the valves adjusted because that's another issue on these; too tight clearances will burn exhaust valves.

My first Trooper was an '86 4-door, 2.3 5-speed. These can get really good mileage if driven carefully. Mine, with a Delta Cams regrind and turbo muffler, got almost 25 mpg on a trip to the hills. Not bad for a rig with the aerodynamics of a brick!

Post those pics when you can. We'll all like to see what may be the Lowest Mileage '86 Trooper in the U.S.!

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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sun Aug 18, 2019 11:02 am

Hey Ed,

Thanks for the reply. I will replay the message for sure. Hoping to get it back this week, I will definitely post some photos!
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby JLEMOND » Sat Aug 24, 2019 7:18 am

J_Breeze_Isuzu wrote:Hey Ed,

Thanks for the reply. I will replay the message for sure. Hoping to get it back this week, I will definitely post some photos!


WHAT EVER YOU DO , MAKE ABSOLUTELY CERTAIN THAT WHO EVER CHANGED THE TRANS AND T/CASE OIL USED THE CORRECT OIL , IT MUST HAVE ENG OIL IN BOTH , IF NOT IT WILL RUIN BOTH IN A FEW THOUSAND MILES , WHAT EVER YOU RUN IN THE ENG, PUT THAT WEIGHT OIL IN THE TRANS , VERY COMMON FOR THE EXPERT MECH , AN D OIL CHANGE JOINTS TO FILL WITH GEAR OIL , IF IT ALL READY HAS BEEN SERVICE AND GEAR OIL USED HAVE THEM FLUSH IT OUT OF BOTH WITH KEROSENE AND DRIP DRY AND THEN REFILL WITH THE CORRECT OIL., THOSE TRANNY,S ARE ALL MOST IMPOSSIBLE TO FIND THAT ARE WORTH BRINGING HOME AND ALL WITH LOTS OF MILES ON THEM.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby JoeIsuzu » Sat Aug 24, 2019 5:21 pm

Never heard of a serpentine belt on an '86, but maybe I'm just THAT unfamiliar with the 4ZD1. I'm assuming it's not a turbodiesel, since you didn't mention it.

Since you're new here, you may need to be told: Take Jerry's (JLEMOND's) advice about your transmission and anything else you run across. Everybody here would agree! ;)

Nice find, and welcome aboard.

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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sat Aug 24, 2019 6:32 pm

Will do. Thanks!

I very well could be wrong, maybe doesn’t have a serpentine belt. Excuse my ignorance I’m not the most advanced car guy. I know I got a new timing belt and timing adjustment and so on. Got it back today, super pumped!
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby DSUZU » Sat Aug 24, 2019 9:10 pm

Congrats on the score. Can't wait to see pictures. X3 on the tranny oil. On the valve adjustment, if you are "having it done" (vs doing it yourself), have them check the torque on all the head bolts too.
If teh truck is as clean as you describe, I suggest keeping any mods to a minimum, as one this old, all original, with this low of mileage, IS a collectors piece. 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 air filter (drop in), dump bed conversion, burgundy interior change, warn brush bar. Engine is bored .020 oversize and upgraded to 1994 pistons, head and EFI system.
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. 1994 Amigo devoured to provide head and EFI system.
Heavily damaged by engine compartment fire while driving on March 24th 2018, condemned by insurance company and taken on March 30th 2018 :cry:.

https://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sat Aug 24, 2019 9:46 pm

Here are some photos, I have to do it in two posts because I can’t post more than 5 photos at a time.

I’m planning on keeping it pretty much stock. I do want to build it for minimal overlanding and Jeep trails. I was going to put a 2” calimini lift kit, and a new set of tires. Other than that really have no plans to change anything else.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sat Aug 24, 2019 9:49 pm

Last set of photos. Not sure why some of them uploaded sideways, but you guys get the point.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby takemehome4LOroads » Sun Aug 25, 2019 3:34 am

:o Wow! What a beaut! Love the round headlights, and paint looks mint. Can't wait to do a round headlight conversion on mine.

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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby DSUZU » Sun Aug 25, 2019 11:54 am

Yeah, 2" lift isn't all that extreme, and tires are tires. That is a real survivor, possibly the cleanest I have seen. Guarantee it will (already has) collector value. You didn't mention what you paid for it (don't have to - some do, some don't), but that is a true investment as prices on these are only going up. 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 air filter (drop in), dump bed conversion, burgundy interior change, warn brush bar. Engine is bored .020 oversize and upgraded to 1994 pistons, head and EFI system.
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. 1994 Amigo devoured to provide head and EFI system.
Heavily damaged by engine compartment fire while driving on March 24th 2018, condemned by insurance company and taken on March 30th 2018 :cry:.

https://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060
City of St Petersburg (Fl) Fleet Maintenance 8/23/83 - 12/4/2018 (Retired). Started new job 6/4/2019. Was retired, now just tired.

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

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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sun Aug 25, 2019 1:26 pm

I got it for 3k. She was asking $3500, but dropped it to 3k as it had been for sale for probably 6 months+. I was going to ask for $2500, but after test driving it and realizing how clean it was I just didn’t have it in me to ask for money off. I figured it was worth every penny. I have put another $1200 into it going through everything. Here is a list of everything done so far.

Isuzu 1986 4 cyl
Belts (drive)
Timing belt
Spark plugs
Spark plugs wires
Fuel filter new
Differentials service
Check interlock
Ignition timing
Oil change
New antifreeze
Valve cover gaskets
Brakes
New vacuum lines
Water pump new
Thermostat new
Radiator hose upper lower new
Radiator hoses stainless steel clamps
Radiator cap.

Fuel pump still sputters a bit at highway speeds. I’m going to drop the tank and refinish it and also do the fuel pump this week. Other than that I can’t think of anything else it needs.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby DSUZU » Sun Aug 25, 2019 2:05 pm

Just to be sure, you are aware that the fuel pump on that one is a mechanical pump and it is located under the intake manifold. It is most easily accessed by removing the right front tire and rubber fender skirt / flap. You want to make sure the cam lobe that drives the fuel pump is in the retracted position (I think someone here knows what timing position that is - hopefully, they will chime in).
At that price, you got it for about half of what is worth (collectors value, but I have seen them go for MORE).
Valve cover gasket is mentioned. Did the valves get adjusted at that time? If they weren't, they can be adjusted without having to buy a new gasket as they are made for re-use. Again, SWEET SCORE. 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 air filter (drop in), dump bed conversion, burgundy interior change, warn brush bar. Engine is bored .020 oversize and upgraded to 1994 pistons, head and EFI system.
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. 1994 Amigo devoured to provide head and EFI system.
Heavily damaged by engine compartment fire while driving on March 24th 2018, condemned by insurance company and taken on March 30th 2018 :cry:.

https://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060
City of St Petersburg (Fl) Fleet Maintenance 8/23/83 - 12/4/2018 (Retired). Started new job 6/4/2019. Was retired, now just tired.

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."

Forget the "free education". Why waste time. Just give me the "FREE INCOME".
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sun Aug 25, 2019 2:08 pm

I asked him to check the valves. Said it looked like the original owner had adjusted them and it didn’t need it at the moment. He wanted me to drive it for another 10k miles or so and then we are going to adjust valves and put in a new clutch.

I keep seeing conflicting statements on the fuel pump. Some say it’s mechanical, some say it’s elsctrical. I checked the tank and where a electrical one would be and it looks like it has a electrical fuel pump on top of the tank. Now I’m confused.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby DSUZU » Sun Aug 25, 2019 3:24 pm

What you are seeing SHOULD only be the fuel sender (gauge). Your 1986 has a carb, and thus the mechanical fuel pump as I described. No confusion. It will be basically the same set up I had on my 1987. The only difference would be if it were California vehicle and then it would have a feedback carb, O2 sensor, and a carb computer.
Sputtering could be carb from sitting a lot? I'd try a bottle or two (tank or two) of seafoam (which many swear by) or Techron Plus (which I have used with good results).
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 air filter (drop in), dump bed conversion, burgundy interior change, warn brush bar. Engine is bored .020 oversize and upgraded to 1994 pistons, head and EFI system.
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. 1994 Amigo devoured to provide head and EFI system.
Heavily damaged by engine compartment fire while driving on March 24th 2018, condemned by insurance company and taken on March 30th 2018 :cry:.

https://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060
City of St Petersburg (Fl) Fleet Maintenance 8/23/83 - 12/4/2018 (Retired). Started new job 6/4/2019. Was retired, now just tired.

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."

Forget the "free education". Why waste time. Just give me the "FREE INCOME".
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby hessmess » Sun Aug 25, 2019 6:18 pm

Your 86 has the mechanical pump, I had one like it when I first started my addiction. Ran fantastic but used alot of oil. Usually got about 22-23 MPG. As Dennis said the best way is to pull the right front tire and the rubber flap to get a good look at it. I could change that puppy in about 1 hour back in the day. As I remember I used a 1/4' inch drive with several wobbly joints and extensions to get at it.
Man I drooled on those pictures, I have never seen such a clean one myself. No such thing out here in Northern Nevada.
Are you in the Denver area? I will be in that area in mid November and would like to look at that in person if possible.
86 Trooper (sold to brother) wrecked and recycled
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91 LS Trooper, 5 speed, 3.4, bored intake, LSD, rebuilt using parts donated from the first 91
https://forum.planetisuzoo.com/viewtopi ... 15&t=81567
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby DSUZU » Sun Aug 25, 2019 7:01 pm

hessmess wrote: would like to look at that in person if possible.

I almost think we should make a shrine to it :D. Seriously, a walk around Youtube video would be REALLY nice. 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 air filter (drop in), dump bed conversion, burgundy interior change, warn brush bar. Engine is bored .020 oversize and upgraded to 1994 pistons, head and EFI system.
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. 1994 Amigo devoured to provide head and EFI system.
Heavily damaged by engine compartment fire while driving on March 24th 2018, condemned by insurance company and taken on March 30th 2018 :cry:.

https://forum.planetisuzoo.com/viewtopic.php?f=15&t=64060
City of St Petersburg (Fl) Fleet Maintenance 8/23/83 - 12/4/2018 (Retired). Started new job 6/4/2019. Was retired, now just tired.

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."

Forget the "free education". Why waste time. Just give me the "FREE INCOME".
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby RickP » Sun Aug 25, 2019 9:22 pm

That thing is gorgeous. I don't think I could drive it on a gravel driveway let alone offroad.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Mon Aug 26, 2019 11:15 am

I need to set up a YouTube account, but I can get you guys a solid video here soon.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby BoiseTrooper » Tue Aug 27, 2019 7:40 pm

Jerry is right (as usual. the man is a wealth of knowledge)

I recently swapped the fluids in my 88. The tranny had oil but the transfer case had red atf in it. I switched everything to SAE30 oil and the drivetrain drone sound quieted down significantly.

It is WELL worth your time.

-Curtis
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby paulevans76 » Wed Aug 28, 2019 1:47 pm

Wow, that is a nice one and a steal!!!
Scratch n Dent special 1991 Trooper S
3.4 V6 - Holley TBI, CompCams 252H, 1.6:1 roller rockers, +1mm DOHC pistons, MSD ignition, custom tune, "Ed Mc Special" 2.5" exhaust
MUA5 w/ 3.07's & fixed yoke
SAS - Waggy F D44 - 5.38's, RCV's, OX locker; Rodeo R 44 - Detroit, truss
Front Y-link radius arms, coils; Rear SOA, OME leaves, anti-wrap bar
35x12.50/17 General Grabber X3's on 17x9 Interco Birddogs
Trail armor and Warn XD9000
The White Whale - a temporary daily driver 1991 Trooper - 2.8 V6, MUA5 - stocker resto (sold)
1994 Samurai - 1.3 FI - OME suspension, 31's, 6.5:1 tcase, 5k milemarker SxS winch, more to come!

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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Sun Sep 29, 2019 7:11 pm

Hess, yeah I am in the Denver area. Will be moving to the mountains about 50 minutes outside of Denver in October. More than happy to show it to ya.


I’m still battling some fuel delivery issues. I am not extremely mechanically included but I think it’s the fuel pump, though I am not certain. 85% of the time it starts right up and drives great at in town speeds. I’m losing power under throttle over 45-50 though. It never dies, just chokes out anywhere over 3.3k rpm. I let off the gas and it seems to be fine. Never a issue under 45.

Recently it has failed to start twice in the morning. Anybody have some suggestions?
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby JLEMOND » Mon Sep 30, 2019 11:12 am

J_Breeze_Isuzu wrote:Hess, yeah I am in the Denver area. Will be moving to the mountains about 50 minutes outside of Denver in October. More than happy to show it to ya.


I’m still battling some fuel delivery issues. I am not extremely mechanically included but I think it’s the fuel pump, though I am not certain. 85% of the time it starts right up and drives great at in town speeds. I’m losing power under throttle over 45-50 though. It never dies, just chokes out anywhere over 3.3k rpm. I let off the gas and it seems to be fine. Never a issue under 45.

Recently it has failed to start twice in the morning. Anybody have some suggestions?


YOU MAY NEED A HI ALTITUDE KIT INSTALLED , IF IT DOESN'T ALL READY HAVE ONE , ON THOSE CARBS, THAT WERE NORMALLY OPERATED UNDER 4500 FT ALY THEY GOT BY OK ANYTHING OVER THAT YOU NEED A HI ALT KIT SO IT DOESN' T RUN TOO RICH , CAUSING STUMBLE S HARD STARTS AND MAYBE E EVEN SO BLACK EX SMOKE
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby J_Breeze_Isuzu » Mon Sep 30, 2019 11:14 am

It does have the factory high altitude kit, maybe I will dive deeper into it making sure it is functioning properly.
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Re: 1986 Isuzu Trooper 2 Door, 30k Original Miles!

Postby Ed Mc. » Mon Sep 30, 2019 2:26 pm

IMHO you're gonna have to open up the carb and inspect for issues. You might have a problem with the float/needle, or main jets clogged. IIRC the 2.3 carb has a little round window in the side, what's the fuel level when it's idling.

I had an issue with my old '86 2.3 when the cat clogged, it wouldn't go over 35 mph. But yours has such low miles I wouldn't expect it to have that issue. Unless there was a mouse living in the exhaust, plugging it up!! :idea:

Last thought, when the problem presents itself, pull to the side of the road, pop the air cleaner and check to make sure the choke butterfly is completely open. If the automatic choke is on, even partially, it can make the rig run poorly.
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Yes, I am a Trooper-Holic!!!
Keep On Troopin' !

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