| CRANKSHAFT SPECIFICATIONS FOR DUAL PLUG ENGINES |
Crankshaft Specifications On
Ford 2.3L Dual Spark Plug Engines
The Ford Motor Company has changed the crankshaft main journal
sizes on Ford 2.3L engines used in Ranger and Bronco II trucks
that utilize dual spark plugs for each cylinder. Engines with a
single spark plug per cylinder retain the former journal sizes.
The crankshaft specifications are:
Dual Spark Plug Main Journal Size 2.2051-2.2059
Main Housing Bore 2.3971-2.3979
Single Spark Plug Main Journal Size 2.3982-2.3990
Main Housing Bore 2.5902-2.5910
All Models Rod Journal Size 2.0465-2.0472
Rod Housing Bore 2.1720-2.1728
The dual spark plug crankshaft carries the casting number E88E-AB
or E89E-AB.
The AERA Technical Committee
July 1991 - TB 786
##END## |
| ROD KNOCK |
Rod Knock Sound On 1985-87
Ford 2.3L D (143 CID), 2.8L (171 CID) And 2.9L (177 CID) Engines
Ford Motor Company engineers advise that a rattling noise in the clutch area may be misdiagnosed as an engine rod knock. The engines listed above are found in the Ford Ranger, Bronco II and Aerostar vehicles built in 1985-87.
This noise occurs where the hydraulic clutch slave cylinder is installed in the clutch housing and can be corrected without pulling the engine or transmission. a two piece shim packet can be installed between the clutch housing and the slave cylinder as indicated in Figure 1 below. Install the shims with contact
cement by simply reaching around the clutch housing to where the slave cylinder line enters the transmission.
the shim pack is available from Ford Motor Company under part #E5TZ-7C528-A and is called Shim-Slave Cylinder.
The AERA Technical Committee |
| SLIPPED VIBRATION DAMPER |
Incorrect Timing On
1984 4.9L (300 CID) 6 Cylinder Gasoline Engines
It's been reported that a number of 1984 Ford E & F trucks and Bronco vehicles with the subject engine may suffer from timing that is off by more than 4°, thus resulting in poor performance. The reason may be that the vibration damper bonding may have slipped.
The figure below will help you to determine the correct location of the timing mark. Do no, however, mistake the monolithic notch for the timing mark. the monolithic notch is located 180° from the keyway.
The AERA Technical Committee |
| REVISED CYLINDER BORE SIZE |
Cylinder Bore Size On
1984-86 Ford 2.0L (122 CID) Engines
AERA members have contacted headquarters because they questioned
the cylinder bore specification published in a number of shop
manuals for the 2.0L (122 CID) engine used in 1984-86 Ford Ranger
pickups and Bronco IIs. The listings have included bore sizes
ranging from 3.5196 to 3.5250.
AERA's investigation has determined that the correct standard
bore size is 3.5180. However, Ford Motor Company advises that
the standard bore size can vary from a low of 3.5165 to a high
of 3.5201. This is a range of .0036.
Because piston to cylinder wall clearance is .0014 to .0022 you
must carefully check these clearances when replacing standard
sized pistons in this engine.
The AERA Technical Committee
August 1986 - TB 397
##END## |
| BENT CONNECTING RODS |
Bent Connecting Rods On
1986-91 Ford 2.9L (VIN T) Engines
Instances of low compression in one cylinder on 1986-91 Ford 2.9L
engines used in the Ranger, Bronco II and Explorer have been
reported to the AERA Technical Committee. Disassembly of the
defective engine revealed that one piston no longer traveled to
the top of the cylinder bore, because of a bent connection rod.
The cause for the bent connecting rod was attributed to a
Hydrostatic Lock by water entering the engine through the
induction system. This can occur during normal wet weather
driving, such as driving through shallow water or splashing from
other vehicles.
Ford has changed the induction system beginning with the 1988
production year. Reportedly the number of instances of engine
damage since then has been greatly reduced.
The AERA Technical Committee
July 1993 - TB 1007
##END## |
| OIL PRESSURE LOSS |
Oil Pressure Loss On
Ford 4.9L (300 CID) Engines Built On August 1, 2 And 3, 1983
A small quantity of light E & F trucks and Bronco vehicles may have mismachined camshaft journals which could cause premature bearing wear and subsequent loss of engine oil pressure. Low oil pressure concerns, with or without engine noise, may be a result of this condition on subject vehicles built on the above dates.
To determine if a camshaft is suspect, inspect the journals and lobes for any excessive wear, chatter or unusual pattern on the surface finish. Pay particular attention to the #1 lobe or the 2nd and 3rd bearing journal.
If any of the described conditions exist, replace the camshaft and bearings. If the camshaft does not show excessive wear or irregularity of the surface finish, check the oil pump for damage and proper operation.
The AERA Technical Committee |
| VALVE ADJUSTMENT PROCEDURE FOR 1986 2.9L ENGINES |
Valve Adjustment Procedure For
1986 Ford 177 CID (2.9L) V6 Engine
AERA members should be aware that the 1986 Ford Manual for the Ranger and Bronco II incorrectly states the number of turns on the rocker arm adjusting screw to set the valve lash. The manual states that the adjusting screw should be rotated 4.5 turns. Ford Motor Company advises that the correct procedure is to rotate the adjusting screw 1.5 turns. Using the incorrect specification could result in valve damage.
To adjust the hydraulic lifters on this engine, position the cam so the tappet being adjusted is in the base circle area. Loosen the adjusting screw until a distinct lash between the rocker arm tip and the valve tip is evident. Carefully turn the adjustment screw until the rocker tip just touches the valve tip. Turn the
adjusting screw in an additional 1.5 turns.
The AERA Technical Committee |
