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Full Overhaul!

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Old Yesterday | 11:27 PM
  #1  
Karl_Schuler's Avatar
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Car: 1985 Trans Am
Engine: Barely
Transmission: Blown
Axle/Gears: I guess?
Full Overhaul!

Hey guys, been a while. I'm finally getting around to my overhaul that I was planning out several months ago. To make a long story short, the camshaft bearings were wiped out, which has really extended the timeline for the entire project.

To summarize what all has been done and will be done, I'll make a series of bullet points with pictures:


Pulled the full powerplant out through the front over a weekend with my buddies help:







Pulled the timing set and camshaft. Bearings are wiped, but on the bright side, it has its original nylon timing gear, so I know the car is probably sub-100k miles!



I also inspected the TQ converter and determined it was a replacement high-ish stall converter (~1800-2000 rpm stall).

I will also be/have the parts on hand to:
Rebuilding the transmission
Changing all gaskets and seals on the engine
Changing the differential gasket and inspecting gears + changing the oil (9 bolt posi w/ 3.27 gears or G92 Package)
Checking all Camshaft journals and crank bearings and journals.
Changing crank bearings if necessary
Porting and polishing the original heads (#416 Heads whoohoo!)
Porting and polishing the upper and lower intake manifolds
Installing and degree-ing a new mild cam and lifters (224-224 duration, 114 degrees of LSA and .450/.465 lift with a 1.5 rocker ratio)
New pushrods
New valve stem seals and springs
Installing an adjustable fuel pressure regulator
Installing new headers and fabricating a 3" exhaust with a magnaflow muffler (no cats)
Installing a new cast iron double roller timing set
Bypassing the TB coolant passage
Greasing all steering/suspension joints
Installing a new cooling fan switch
Installing a new speedometer gear, odometer gear and dash lights
Installing new window motors and lock actuators
Installing new headlights
Reasealing windows and t-tops
Changing rear hatch struts
Rotating tires

I've probably forgotten some stuff, so if I remember it I'll throw it in here, but I think it's safe to say I'm going to take this as close as I can get to having a brand new 40 year old car!

Last edited by Karl_Schuler; Yesterday at 11:45 PM.
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Old Today | 10:43 AM
  #2  
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Re: Full Overhaul!

Not that you need anything more on your list, but with an empty engine bay it would be a wonderful time to update to a later ECM and harness to support the injection system more effectively. The 1985 ECMs were almost crude compared to the later, slightly less crude variants.
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Old Today | 02:03 PM
  #3  
Karl_Schuler's Avatar
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Junior Member
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Joined: Apr 2024
Posts: 15
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Car: 1985 Trans Am
Engine: Barely
Transmission: Blown
Axle/Gears: I guess?
Re: Full Overhaul!

Which ECM would you recommend? I know the '86 ECM is a big upgrade in terms of processing power, but will the harness mate up to all the original sensors? If not, what would I need to replace? Thanks!
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