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Part Stores  >  Car Engines Store  >  AMC  >  L6, 4.2 L, 258 CID Rebuilt Engine

1986 AMC L6, 4.2 L, 258 CID Rebuilt Engine

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Part NameL6, 4.2 L, 258 CID Rebuilt Engine
Automobile AMC
Stock No.AGAMC258LB4
DescriptionBlock #444. Head #480, 656, 000. Valve cover bolts thru center of cover.
Size4.2 L, 258 CID
Engine TypeL6
Fuel TypeGasoline
Fuel DeliveryCarburetor
AspirationNon Turbo
Head Casting1656, 4480
Block Casting5444
Crank Casting5477
Discount/Sale Price1,120.00 *
* - price as of 06/24/2009. Actual prices may vary.

1986 AMC Eagle
1986 AMC Eagle Limited

AMC Engine Quality

Most rebuilt AMC engines are just that, rebuilt. Our AMC remanufacturing line builds to IMPROVE not just REPLACE! All parts in our high quality AMC performance engines (long blocks, short blocks, big blocks & small blocks) meet or exceed all the AMC original specifications, and most of the time are purchased from the same suppliers who supply AMC!

All the moving parts in our AMC remanufactured engine are NEW. Be cautious of other engine remanufactures using used, broken, re-machined or returned parts!

Due to our precise re-manufacturing standard, the AMC Engine line has achieved one of the lowest breakdown rates in the world - Below 1.5% breakdown rate

We keep a large inventory of AMC remanufactured engine blocks mostly for passenger cars, light trucks, pickups and some marine applications. Most of our AMC engine supply is ready for instant freight.

AMC Engine Description

  • Our entire AMC long blocks (small or big blocks) come with cylinder heads and valve train installed. Note, you have to reuse the existing valve cover(s), timing cover, intake manifold and oil pan from your original AMC car, truck or SUV.
  • The AMC long blocks have NEW valves, valve springs, valve keepers, push rods, rocker arms, fulcrums, lifters, camshaft, timing chain (belt), timing gears, valve guides (diamond honed), three angle seats, cam, rod and main bearings, pistons, piston rings, rod bushings when applicable, gaskets and oil pump.
  • The AMC cylinder blocks, cylinder heads, crankshafts and connecting rods are cleaned and shot peened and magnafluxed for cracks. All the AMC motor bolt holes are tapped.
  • The AMC Cylinder blocks are bored to each piston and diamond honed to 18RMS finish. All oil galleys are hand brushed with white cleaning brushes and cylinders are hand cleaned with cleaning solution and white towels.
  • Your AMC cylinder heads have each valve guide diamond honed, seats are three angle. Following assembly, your AMC motor heads are vacuum checked for valve seating.
  • This AMC crankshafts are ground and polished to 12RMS. Each oil galley is hand brushed with a white cleaning brush.
  • All connecting rods on the AMC block are honed.


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