1989 Trooper 2.6 4ze1 itec EGR pipe information

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1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby 89TrooperPeep » Fri Apr 09, 2021 11:20 pm

I just found that my recently purchased first Trooper is missing the EGR pipe. The rest of the EGR system is in working order and intact and the exhaust seems to have a jankly old drain plug in the egr pipe hole and the intake has nothing NOT EVEN THE FITTING on the intake manifold. Just a threaded hole I can stick my finger in.

I bought some high-temp tubing and got some fittings custom made for my best guess of the threading(m22 x 1.5), but it wouldn't thread into the intake.

Does anyone know what the threading is for the hole where the fitting for the egr pipe goes into the manifold or know of somewhere I could get a new pipe AND fitting? Can't seem to find even the pipe anywhere.
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby DSUZU » Sat Apr 10, 2021 12:58 pm

It is the same fitting for both ends. If the EGR valve actuating (vacuum) hose is unhooked, that hole is sealed by the EGR valve. The EGR pipe is available through user JLEMOND (Jerry), or user Shawn Anthony (IIRC he gets 50.00 for them). Some users have used ones they offer from time to time. 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: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby JoeIsuzu » Sat Apr 10, 2021 1:45 pm

When I had a '94 Amigo, I tried to use a section of "high-temperature" silicone tubing. It lasted until the engine warmed up. :(

At that time, Jerry could get them factory-new. I don't know if they're still available. $50 seems reasonable for a used one in good condition, but keep in mind--they have a limited lifespan.

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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby giusedtobe » Sat Apr 10, 2021 5:23 pm

Get a used one. There are thousands of them out there in junk troopers. Should not be too hard to find one if Jerry does not have them. Put an ad in the classifieds here and I am sure someone can help you.

Dennis, what would happen if you just plugged it up and did not use the EGR system?
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby DSUZU » Sat Apr 10, 2021 6:00 pm

giusedtobe wrote: Dennis, what would happen if you just plugged it up and did not use the EGR system?

When the EGR tube on my Spacecab broke while driving down the interstate*, I made a temporary "fix" by unplugging the EGR valve (sealing the intake end) and welding up the exhaust end to make a plug. I ran the truck that way for a month or so until I got around to putting the replacement on. During that time, I noticed no increase or decrease in power, but I DID notice my gas mileage DROP by about 2 MPG (I monitor my gas mileage closely).
* It is my belief that the EGR tube broke (and that many others' break) because there is supposed to be a clamp mid point on the tube that attaches to a bell housing bolt. This clamp is often not put back on when either doing clutch work, or head work as the bolt is difficult to get to because of the tube. Lack of the clamp allows vibration of the tube, which causes it to crack. Dennis

EDIT: Note - on 1993 and newer 2.6 Rodeos, Amigos, and pickups, there is a different EGR tube as these have a gland nut on the intake end, and a 2 bolt flange on the exhaust end.
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: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby JoeyTrooper » Sun May 02, 2021 1:52 pm

Can someone post a picture of what the EGR pipe looks like, specifically for the first gen trooper 2.6L?
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby JoeyTrooper » Mon May 17, 2021 1:18 pm

JoeyTrooper wrote:Can someone post a picture of what the EGR pipe looks like, specifically for the first gen trooper 2.6L?


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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby BoiseTrooper » Mon May 17, 2021 1:45 pm

Here is a pic of the back of the head and the iTec.

It shows the EGR tube.

634358769.jpg
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby BoiseTrooper » Mon May 17, 2021 1:49 pm

DSUZU wrote:
giusedtobe wrote: Dennis, what would happen if you just plugged it up and did not use the EGR system?

When the EGR tube on my Spacecab broke while driving down the interstate*, I made a temporary "fix" by unplugging the EGR valve (sealing the intake end) and welding up the exhaust end to make a plug. I ran the truck that way for a month or so until I got around to putting the replacement on. During that time, I noticed no increase or decrease in power, but I DID notice my gas mileage DROP by about 2 MPG (I monitor my gas mileage closely).
* It is my belief that the EGR tube broke (and that many others' break) because there is supposed to be a clamp mid point on the tube that attaches to a bell housing bolt. This clamp is often not put back on when either doing clutch work, or head work as the bolt is difficult to get to because of the tube. Lack of the clamp allows vibration of the tube, which causes it to crack. Dennis

EDIT: Note - on 1993 and newer 2.6 Rodeos, Amigos, and pickups, there is a different EGR tube as these have a gland nut on the intake end, and a 2 bolt flange on the exhaust end.



Oh damn. I just found that clip in a pile of bolts. Looks like I am one of the ones who forgot to put it back on! I will have to try to figure out a different bracket I guess. Dang.
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby JoeyTrooper » Mon May 17, 2021 2:29 pm

BoiseTrooper wrote:Here is a pic of the back of the head and the iTec.

It shows the EGR tube.

634358769.jpg


Thanks. This helps. I ordered one recently and it looks different than this one. I'm not sure what vehicle it's for though. I was told 1989 2.6 Isuzu trooper. This is what the one I ordered looks like. Any idea which Isuzu this would have come from?

Image
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby BoiseTrooper » Mon May 17, 2021 3:15 pm

By the way, this is the clip Dennis was referring to. It holds the EGR tube tight to the bell housing. (Try not to overlook it, like I obviously did.)

IMG_8821.jpg
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby BoiseTrooper » Mon May 17, 2021 3:34 pm

JoeyTrooper wrote:
BoiseTrooper wrote:Here is a pic of the back of the head and the iTec.

It shows the EGR tube.

634358769.jpg


Thanks. This helps. I ordered one recently and it looks different than this one. I'm not sure what vehicle it's for though. I was told 1989 2.6 Isuzu trooper. This is what the one I ordered looks like. Any idea which Isuzu this would have come from?

Image


Sorry. I don't recognize it. I am sure one of the more veteran forum members will be able to identify it.
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Re: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby DSUZU » Mon May 17, 2021 4:36 pm

The 2.6 and 2.3 EGR pipes (PRE 1993) have male thread gland nuts on each end. The intake (EGR) end faces up (if held in normal position) and the male end faces forward. The 1993 and later have the up facing gland nut on the EGR end and a 2 bolt flange facing forward for the exhaust manifold end. 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: 1989 Trooper 2.6 4ze1 itec EGR pipe information

Postby JoeyTrooper » Mon May 17, 2021 5:00 pm

DSUZU wrote:The 2.6 and 2.3 EGR pipes (PRE 1993) have male thread gland nuts on each end. The intake (EGR) end faces up (if held in normal position) and the male end faces forward. The 1993 and later have the up facing gland nut on the EGR end and a 2 bolt flange facing forward for the exhaust manifold end. Dennis


Good to know. That's interesting. The one I have here has a male threaded gland nut in only the exhaust manifold side, and a female threaded nut on the EGR end. What's more is that both the EGR end and the exhaust manifold end face forward. So clearly is not from an 89 Isuzu 2.6...oh well. I guess that's $50 down the drain...I'm still curious to know what vehicle it did come from so that perhaps I can resell it
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