There are several variations on the 2.3 heads though they break down into (4) distinct types:ġ) Passenger car oval port heads – 1974 – 1980 Mustang, Pinto, Fairmont, Bobcat, etc.Ģ) Passenger car D-port head – 1981 – 1995? T-bird, Mustang, Etc.Ĥ) Truck D-port – 1989 – 2001 Ranger. They differ from each other in their valve sizes though. Early 2.0 and 2.3 heads have the same small round intake ports spaced evenly apart. Later model (1995 and newer) roller cam followers cannot be easily swapped onto an older head as the valve stem size was reduced in the newer heads and matching slot in the follower was reduced.

All cams are interchangeable as long as they are used with the proper followers. They all have similar exhaust port shape and placement. The 2.5 pistons are similar to the 2.3’s but have a different wrist pin height.Īll 2.0/2.3/2.5 heads will physically bolt in place of each other. The 2.3 pistons are all the same excluding the turbo versions which were forged. The 2.0 pistons are unique and don’t interchange. In fact they still have the original D4 (’74) casting number on them. Late 2.3 cranks have smaller main journals.Ģ.5 cranks are identical to 2.3’s except they have a longer stroke.Ģ.0 and 2.3 (including turbo) rods are identical up through at least 1994. Turbo blocks are identical to the 1983 – 1988 Ranger blocks but have an additional boss with a hole threaded in the passenger side about ½ way back that provides a place to drain the lubricating oil back into the engine from the turbo. The hole for the distributor was eliminated and the oil pump was moved in place of the aux.

The oil pan seal surface was changed in 1987 to eliminate the (4) piece seal and holes were added in the front to bolt on the DIS’s crank trigger assembly.ġ995 – 2001’s are similar to the 1989 – 1995’s but a Cam Position Sensor was added behind the aux sprocket. With the exception of the bore, the blocks are identical to all 2.3’sġ989 – 1994 2.3’s are the same as the 1983 – 1988 2.3’s but have a smaller main journal saddle. Sequential Electronic Fuel Injection - Four Port-Mounted Fuel Injectors Electronically Triggered By EEC-V Moduleįiring Order: 1-3-4-2 ( Distributor Rotation: Clockwise)ġ989–1997 2.3L, 2002-2003 2.3L Duratec and 1998-2001 2.5L Enginesįiring Order: 1–3–4–2 ( Distributorless Ignition)ĭifferences between major engine parts are as follows: Multipot Fuel Injection (MFI) (1985 – 1997)

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