1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
I did not start a thread when I first bought this car like I wanted to, but I bought a mostly original 89 Iroc that I am putting back as OEM as possible and repairing the small issues it had
-repaired antenna
-remove front plate and refinish grill
-repaint trim
-refinish foglight surrounds
-plugs
-all new N10- exhaust
-removed factory dealer emblem(but kept)
-new aftermarket Tuned Port Injection emblem
-Lloyds mats
-repaired faulty temp guage
-replaced one cracked door sill
-Trans refresh and new clutch
-new overflow tank
I want to correct the paint and we should be about finished with it. It's a VERY cool car.
I don't have many pictures on here, but will post some of the process soon.
For now here is the last video I made about it.
-repaired antenna
-remove front plate and refinish grill
-repaint trim
-refinish foglight surrounds
-plugs
-all new N10- exhaust
-removed factory dealer emblem(but kept)
-new aftermarket Tuned Port Injection emblem
-Lloyds mats
-repaired faulty temp guage
-replaced one cracked door sill
-Trans refresh and new clutch
-new overflow tank
I want to correct the paint and we should be about finished with it. It's a VERY cool car.
I don't have many pictures on here, but will post some of the process soon.
For now here is the last video I made about it.
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
As she came home. I thought the dealership emblem was cool, so I still have it, but it is removed
Had Hedman headers and Borla Catback. I wanted it back factory!
GT steering wheel removed and the factory reinstalled...
Repaired the temp gauge getting stuck up! (Do they almost all do this or what?)
Had Hedman headers and Borla Catback. I wanted it back factory!
GT steering wheel removed and the factory reinstalled...
Repaired the temp gauge getting stuck up! (Do they almost all do this or what?)
Joined: Mar 2014
Posts: 4,557
Likes: 817
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Very cool car and love seeing them kept original. Good job!
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Took the front end apart for a quick refreshing...... Nothing major. It paid huge diidends in overall appearance though!
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Maybe I am the only one, but I hate power antennas on these cars!
New coolant tank! Word of advice. Do NOT get the OER one. I got two from them and both had cracked nipples. The one from Hawks has the correct stamping on it and is MUCH higher quality!
I was fitting a "no heat" issue. The TB was capped off allowing NO FLOW through the heater core(look in the hose on the right and you can see the cap still in the line!). Strange what you find on cars this old... Removed it and no leaks and the heat and AC both work great!
New coolant tank! Word of advice. Do NOT get the OER one. I got two from them and both had cracked nipples. The one from Hawks has the correct stamping on it and is MUCH higher quality!
I was fitting a "no heat" issue. The TB was capped off allowing NO FLOW through the heater core(look in the hose on the right and you can see the cap still in the line!). Strange what you find on cars this old... Removed it and no leaks and the heat and AC both work great!
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
A little before/after on the rear bumper...
Refinished some correct LB9 manifolds to match to the aftermarket N10 Y-pipe and Walker/Mac catback
Luckily I found the correct N10 exhaust connection!
Refinished some correct LB9 manifolds to match to the aftermarket N10 Y-pipe and Walker/Mac catback
Luckily I found the correct N10 exhaust connection!
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
My girlfriend helps with the details! Painted all the locks, and rear trim for me...
Test corrected one panel. It is going to look GREAT when finished!
Trans replacement and exhaust removal/replacement!
Test corrected one panel. It is going to look GREAT when finished!
Trans replacement and exhaust removal/replacement!
Last edited by NufNuffZ28; Apr 2, 2020 at 08:53 AM.
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Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
All back together. New clutch, PP, etc. Exhaust all back on as well...
Supreme Member




Joined: Nov 2011
Posts: 3,000
Likes: 369
From: CT
Car: 1984 Chevrolet Camaro Z28
Engine: 5.0 Liter 4-BBL V8 High Output
Transmission: 5-Speed Manual
Axle/Gears: 3.73
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Nice Job
Joined: Aug 2013
Posts: 4,844
Likes: 926
From: MICHIGAN
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
I can say it works like a CHAMP now!
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
So the antenna does work now? I would question any antenna repair from someone that can't spell antenna. If the power antenna issue was the broken nylon, there's been discussions and repairs done using cable to replace the nylon. And it works well.
Thread Starter
Joined: Dec 2000
Posts: 1,954
Likes: 68
From: NC
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Re: 1989 MM5, DX3, N10, G92, Hardtop with 52k miles mini-restoration and repair
Yes. It works great now. I found him from here, actually. Mine did had the broken line. He replaced it with a coated metal line( I believe)and repaired my slightly tweaked mast at a reasonable cost.
Joined: Aug 2013
Posts: 4,844
Likes: 926
From: MICHIGAN
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
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