Author Topic: My 1982 2.5l Iron Duke Rebuild  (Read 2063 times)

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Offline joelmgrandfield

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My 1982 2.5l Iron Duke Rebuild
« on: February 17, 2013, 03:25:34 AM »
Hello all,
It has been a couple of years since my SX/4 broke down.  I thought I started a post showing what I was doing with the engine.  I guess not.  I have been dealing with financial issues, and several short military activations.  I am back to working on the 2.5l Iron Duke,  So If anyone is interested, here goes.
I took photos of the project when I started.  I will post those when I get a chance.  The rebuild started with a cam gear tooth failure. Dang those fiber gears.  As some of you know, the cam gear is pressed on so you have to disassemble half the engine just to get the cam out of the car.  Well that is what I did and turned out to be a blessing in disguise.  The bottom of the cam bearings were pitted and the center of the lifters were pitted.  So I pulled the motor out of the car.  Upon complete teardown of the engine, found the fuel pump lobe on the cam was damaged scored pretty bad, the bottom connecting rod bearings were pitted, the bottom Crank bearings pitted, The car only had 69,000 original miles when I got it. the pitting may have been caused from the car sitting for so long, the oil squeezed out from between the metal allowing two different types of metal to contact each other, electrolysis, pitted metal.
1982 AMC Eagle SX4,
1992 Dodge, Cummins, 1 Ton Duelly
1967 International Scout 800
1988 and 1994 Chevy k1500
1960 Ford F100
1927 Model T, Hotrod

Offline joelmgrandfield

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Re: My 1982 2.5l Iron Duke Rebuild
« Reply #1 on: February 17, 2013, 03:45:16 AM »
So one of my last posts a couple of years ago, I was getting my engine block back from the machine shop.  When I picked up the block, the shop charged me for the complete job, they had not done the final hone in the cylinders.  Block sat in storage for over a year.  I took the block, head, crank, connecting rods, and new pistons to a new machine shop.  I just picked everything up 2 days ago.  I am ready to start the rebuild.  I had the block cleaned and then bored .030 over, crank ground .010/.010.  Final hone in the cylinders.  I had the block "Zero decked" and the head milled.  I ordered a complete performance overhaul kit $$$$$.  New freeze plugs installed, and cam bearings pressed in.  I am trying to find the best cam for the mods made to the engine, I have a new cam gear, aluminum one used in the S10, Mercruiser etc. instead of the stock fiber gear.  New wrist pins and pistons installed on the connecting rods.

 I will take pictures as I rebuild.  I hope this engine rebuild will help any other Iron Duke owners out there see what this little engine can do.  It may have been too small for the Pontiac Firebird oh ouch, but I think It is a good fit for the SX/4.  I am going to try and have this done in a couple of weeks as I am deploying with my Unit to the Middle East in April.
1982 AMC Eagle SX4,
1992 Dodge, Cummins, 1 Ton Duelly
1967 International Scout 800
1988 and 1994 Chevy k1500
1960 Ford F100
1927 Model T, Hotrod

Offline eaglefreek

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Re: My 1982 2.5l Iron Duke Rebuild
« Reply #2 on: February 17, 2013, 08:43:11 AM »
There was a problem with a server a while back and quite a few threads disappeared. I think a warmed up Iron Duke will be fun in an SX4. Thanks for your service and come home safe.  :occasion14:
"I know he'd be a poorer man if he never saw an eagle fly,
Rocky mountain high"  John Denver
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