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Part Stores  >  Car Engines Store  >  Mercury  >  V8, 6.6 L, 400 CID Rebuilt Engine

1971 - 1974 Mercury V8, 6.6 L, 400 CID Rebuilt Engine

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Part NameV8, 6.6 L, 400 CID Rebuilt Engine
Automobile Mercury
Stock No.AGFOR400LB1
DescriptionWithout smog.
Size6.6 L, 400 CID
Engine TypeV8
Fuel TypeGasoline
Fuel DeliveryCarburetor
AspirationNon Turbo
Head CastingD1AE, D4AE-AA, D5AE-A3A
Block CastingD1AE-A D1AE-C D4AE-B2A D7TE-A2B
Crank Casting5MA, 5MAB
Warranty3 Year Warranty / 100,000 Miles
QualityMatch or Exceed OE specs
NotesRemanufactured Engine w/New OEM internal parts
Discount/Sale Price1,333.00 *



1972 - 1974 Mercury Montego MX Brougham
1972 - 1973 Mercury Montego GT
1972 - 1974 Mercury Montego MX
1972 - 1974 Mercury Montego
1971 - 1974 Mercury Monterey Custom
1971 - 1974 Mercury Monterey
1973 - 1974 Mercury Cougar XR-7
1972 - 1973 Mercury Marquis Brougham
1971 - 1974 Mercury Colony Park
1971 - 1974 Mercury Marquis
1972 - 1974 Mercury Montego Villager

Mercury Engine Quality

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

All the moving parts in our Mercury 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 Mercury Engine line has achieved one of the lowest breakdown rates in the world - Below 1.5% breakdown rate

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

Mercury Engine Description

  • Our entire Mercury 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 Mercury car, truck or SUV.
  • The Mercury 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 Mercury cylinder blocks, cylinder heads, crankshafts and connecting rods are cleaned and shot peened and magnafluxed for cracks. All the Mercury motor bolt holes are tapped.
  • The Mercury 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 Mercury cylinder heads have each valve guide diamond honed, seats are three angle. Following assembly, your Mercury motor heads are vacuum checked for valve seating.
  • This Mercury crankshafts are ground and polished to 12RMS. Each oil galley is hand brushed with a white cleaning brush.
  • All connecting rods on the Mercury block are honed.


* Price as of 04/15/2015. Actual prices may vary.