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Rex's 89 3.0 motor fixes #1070721 04/08/14 11:11 PM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline OP
Web Wheeler
*****
Actually laying a wrench to a 3.0 for the first time in a long time.

I spotted a pretty nice 89 base model with offroad package a couple of years ago in my daughter's s/d, and stopped and left my name and number under the wiper, but the owner, Rex, didn't want to sell. Fast forward to last week. Rex had lost the piece of paper with 4x4 wire on it, but he remembered "fasteddy", and with some research, found us here, and pm'ed me after registering. I went over last week, and found a 14 (tps) code on the ecu, and a grossly misadjusted throttle cable, and a persistent high idle and accel bog even after the cable was adjusted. Then after starting like a champ for hours, it quit starting at all, just turned over and over.

Cycled the power transistor plug a couple of times, and she fired right up. Pulled and cleaned and replugged the tps connector and disco'ed the battery, and the 14 code cleared and has not come back. Rex was complaining of a drop in power, so I did a compression test. On cylinders 1,2,3,5,&6, the compression was 147-160. #4 was 87=89 over 3 different tries. Going back tomorrow morning with a radiator pressure tester and a syringe to squirt oil in #4 to diagnose whether rings, head gasket, or valves. My money is either valves or head gasket.

I'll be back tomorrow with more.

Rex is the original owner of this truck, with over 235k miles on her, and the sheetmetal and bumpers are all straight, some very minor wear on the dseat (the velour covers), and the usual loss of clearcoat on the hood and top. Nice dark blue. I was sore tempted to tell him it was junk and I'd haul it away for him, but even an old Bama boy couldn't do that. Everything works except the auto door locks and the headlight washer. The relay clicks but the pump doesn't spin. I'll pull the pump and see if I can free it up. Don't know if I'll have time to do the door lock diagnosis before he moves to Appalachacola FL, and get the engine fixed, too.

molatah...


Not responsible for advice not taken...
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Re: Rex's 89 3.0 motor fixes [Re: fasteddy] #1070722 04/08/14 11:15 PM
Joined: Jun 2002
Posts: 6,208
JohnnyBfromPeoria Offline
Trail Leader
*****
Good man.

John B.

Re: Rex's 89 3.0 motor fixes [Re: fasteddy] #1070723 04/09/14 08:53 PM
Joined: Nov 2003
Posts: 5,690
87Montero Offline
Trail Leader
***
Party on! It's the thrill of bringing something back to life that makes it all rewarding - Good work smile


1999 Mitsu Montero - Crappy Weather
1992 Isuzu Pickup - Zombie Apocalypse
2008 Saturn Sky Redline - Nice Weather
Re: Rex's 89 3.0 motor fixes [Re: 87Montero] #1070724 04/09/14 10:48 PM
Joined: Jul 2002
Posts: 1,758
Jay Ayala Offline
Body Damage is Cool
Good job fasteddy, I hope you get this one running. Take a picture for me.


89 Raider - V6, Automatic, rear LSD, A/C Retrofit, Cruise Control Retrofit.
Re: Rex's 89 3.0 motor fixes [Re: Jay Ayala] #1070725 04/09/14 11:25 PM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline OP
Web Wheeler
*****
Did some more testing today.

Squirted oil into #4 and redid the compression test. Only went up to 92lbs, so it's not the rings. Radiator was building too much pressure from a cold start, before the tstat even opened, so it's the head gasket or a cracked head. Rex just gave the go ahead to tear the head off and fix it. I'll jump into teardown tomorrow, running under the gun as he has to be out of there by next weekend after a Thursday closing. Have to borrow more tools from WWFF to get the crank bolt out, and a torque wrench to snug it back up right, and he won't be back until Sat late from a Disney cruise, but I should be able to get everything off except the head with what I have.

I'll do the water pump and timing belt while I'm in there, and the front main seal.

The only thing I really dread is the rear dside upper manifold brace that bolts to the back of the head. You can't get a wrench on it with the head on, and it never lines up with the manifold if you bolt it on first.


Not responsible for advice not taken...
Re: Rex's 89 3.0 motor fixes [Re: fasteddy] #1070726 04/12/14 01:51 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline OP
Web Wheeler
*****
Well, all that's left to come off is the exhaust mani and the head bolts and timing belt, and the head is off. Waiting on WWFF to get home and get my hands on a half inch breaker bar to bust the crank bolt loose and get the timing belt off, and I need the breaker bar to get the head bolts broken loose. Soaked the crossover pipe bolts today before I left it, so maybe they will be easy on Sunday.

It took me 3 hours today to get the lower intake off. The pside rear stud had corrosion on the shaft, and it would not slide up on the stud. Finally got it soaked enough with penetrant and got a little twist by double nutting it, but theres not enough swing to unscrew it, because the only wrench you can use is a box end, and it's trapped by the double nut. Then I used a 24" pipe wrench with the jaw open and pryed on the arm where the fuel rail bolts down on the rear pside and finally got it to break loose. There's always at least one cranky thing that doesn't want to come out. Hope that's the last one. I had forgotten how bad I hated unbolting the a/c compressor, with the two hidden bolts, all that other stuff in the way, and the upper rear bolt that is blocked by the a/c line, so you have to use a box end wrench on it, and still have a very limited swing, and dammit, not enough head clearance to use a ratcheting box end. I solved the nest of water hoses at the TB, buy just unbolting the TB and the water wafer and laying that stuff aside, since I'm not pulling the pside head this time.

I've been wearing blue nitrile gloves for this whole job. Esplane, please, how I still get grease under my fingernails?


Not responsible for advice not taken...
Re: Rex's 89 3.0 motor fixes [Re: fasteddy] #1070727 04/12/14 02:04 AM
Joined: Nov 2011
Posts: 218
METALMOVER Offline
Wheeler
Back sore yet? Hopefully he just sells it to ya.If I got my Raider to ya. would you rebuild it? 6 mo. time restraint though? MM


1987 Raider,2.6,mt,78"Meyer snow plow,100lb. Doberman alarm,weber carb, lockouts from here- 1989 V-6,SWB, A.T. 4x4, 31'S
Re: Rex's 89 3.0 motor fixes [Re: METALMOVER] #1070728 04/12/14 02:24 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline OP
Web Wheeler
*****
I've got no place to do so. I'm working on Rex's at his house, under a time constraint as I have to be out of there by Sunday week. I've got an engine hoist, but no way to move it from where it's stored, even if it does fold up.

You can do it yourself if you can get the engine out. It's not all that hard if you are careful, and we'll advise from the sidelines. Shop around for a good machine shop. Ask good independent shops for reco's.


Not responsible for advice not taken...
Re: Rex's 89 3.0 motor fixes [Re: fasteddy] #1070729 04/12/14 03:00 AM
Joined: Nov 2011
Posts: 218
METALMOVER Offline
Wheeler
Yeah unfortunately I dont have the time, and the first 2 places I called wanted to replace my heads without even looking at him.Know of any shops in the midwest familiar with em?


1987 Raider,2.6,mt,78"Meyer snow plow,100lb. Doberman alarm,weber carb, lockouts from here- 1989 V-6,SWB, A.T. 4x4, 31'S
Re: Rex's 89 3.0 motor fixes [Re: METALMOVER] #1070730 04/16/14 01:03 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline OP
Web Wheeler
*****
Finished tearing it down Sun, and off to the machine shop on Mon pm. Got the bad news today. Head is junk. No cracks, held a pressure test fine, but the exhaust guide on #4 fell out of the head when they started to tear down the valves. Nobody can make a new oversize guide in time, Clearwater does not have one finished up. I had to go with a local head shop, Allen Cylinder Head, and they will have one by Thur. Drats. Rex took the bad news like a champ (loves this truck). HazyDaze is selling me the water pump and other goodies, and found me the thermovalve for the water neck, which shed both it's nipples while trying to cut off the vac lines, embrittled with age and heat. This part is only on egr motors, and kills the egr vac until the motor heats up.

I'm running way short on time. I have to be done by Sunday, and I'm not going to make it, I think...


Not responsible for advice not taken...
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