| KNOCKING SOUND -- COLT 2000CC ENGINE |
Knocking Sound On
1974-75 Chrysler (Dodge Colt) 2.0L Engines
1974-75 Chrysler (Dodge Colt) 2.0L engines may develop a low grade knocking noise when the engine is started after a long period of nonuse. The manufacturer reports the noise is caused by slack in the timing chain damper. The knocking sound, however, disappears as the engine reaches normal operating temperature in most cases.
A new and 3mm longer timing chain damper tensioner (Part Number MD-021227) is currently available form Chrysler. See diagram.
Caution: Members are cautioned against shimming the damper tensioner. Shimming may lead to possible engine damage.
The AERA Technical Committee |
| REVISED CYLINDER HEAD & ROCKER ARMS ON 1.6L ENGINE |
Revised Cylinder Head & Rocker Arms On
1987 Chrysler 1.6L (98 CID) Engines
The Chrysler Corporation has informed AERA that the late 1987
1.6L (98 CID) engines used in the Dodge Colt are now using a
revised cylinder head and rocker arms.
Engines carrying the number FK9798 and later utilize the
following part numbers: cylinder head #MD125062, intake rocker
arm #MD125217 and exhaust rocker arm #125218. The new rocker arms
may only be used in conjunction with the new cylinder head and
they do not interchange with any earlier components. Furthermore,
do not mix the new and former rocker arms on the same rocker
assembly or use the new rocker arms on the former cylinder head.
The revised components are assembled according to the
illustration below. The wave washers on the current rocker
assembly are positioned in front of the rocker arm, facing the
front of the engine.
(insert illustrations)
The AERA Technical Committee
November 1987 - TB 466
##END## |
| CYLINDER HEAD TORQUE PROCEDURE |
Cylinder Head Torque Procedure On
Dodge Colt Engines
The cylinder head bolts on all Dodge Colt engines should be torqued every 12 months or 12,000 miles and at each time the cylinder head is removed and reinstalled.
The cylinder head bolts must be torqued when the engine is cold.
The following torque recommendations should be followed:
1600 cc. Engine 51 to 54 ft. lbs.
2000 cc. Engine 65 to 72 ft. lbs.
The AERA Technical Committee |
| REVISED VALVE SPRING ON 1989 DOHC ENGINES |
Revised Valve Springs on
1989 Chrysler 1.6L DOHC Engines
Chrysler has released a revised valve spring for 1989 1.6L DOHC
(double overhead camshaft) engines used in the Eagle Summit and
Dodge Colt.
The new spring has been incorporated in all engines with the
build code HB1118 or later. The new spring should only be used
on earlier produced engines if all 16 valve springs are replaced.
Spring replacement is advocated when the free length is less than
1.768 (44.9mm) or it is out of square by more than 4o.
Spring specifications:
Old New
Free length 1.803 (45.8mm) 1.902 (48.3mm)
Load at (40mm) 52.8lbs (24kg) 66lbs (30kg)
Color Yellow Blue
Part number MD121086 MD139243
The AERA Technical Committee
February 1990 - TB 623
##END## |
| REVISED CRANKSHAFT ASSEMBLY ON MITSUBISHI ENGINES |
Revised Crankshaft on
Chrysler 1.5L Engines
Chrysler Corporation has revised the crankshaft in 1989 1.5L engines produced after January 1, 1989 and used in Dodge Colt vehicles.
The new crankshaft features an undercut fillet radius on both rod and main bearing journals making it easy to identify. According to Chrysler, this new crankshaft cannot be remanufactured and Chrysler is therefore not making undersize bearings available for it.
At some point in the future Chrysler may make it possible to grind this crankshaft and undersize bearings may then be made available.
The AERA Technical Committee |
| ENGINE OIL LEAK ON 2000 CHRYSLER 5.9L DIESEL ENGINES |
Engine Oil Leak On
2000 Chrysler 5.9L VIN 6, 7 & 8 Diesel Engines
The AERA Technical Committee offers the following information regarding an engine oil leak on 2000 Chrysler 5.9L VIN 6, 7 & 8 diesel engines. These engines affected are the 24 Valve diesel engines made by Cummins for Dodge Trucks.
Oil seepage may become noticeable in the area of the oil fill cap. Causing this oil leak may be due to paint overspray around the oil fill opening of the cylinder head valve cover. This overspray may cause an uneven sealing surface with the cap to the valve cover.
Another possible cause of the oil leak might be a damaged oil fill cap o-ring. The o-ring may be cut or damaged due to the presence of a sharp corner around the edge of the cylinder head cover oil fill opening.
To repair this type of leak, Chrysler suggests removing the valve cover and cleaning the oil fill cap area with fine grit sandpaper. Sand the top edge of the valve cover around the oil fill hole opening and verify that the entire top edge circumference of the oil fill opening is smooth and rounded.
When we have finished sanding, clean the valve cover of all debris and oil residue. The cylinder head gasket cover is reusable if there are no signs of cuts or damage to the gasket. If gasket needs to be replaced, it can be purchased under Part #05016356AB.
Install the valve cover and torque the bolts to 18 ft/lbs and replace the engine oil fill cap. If the cap needs to be replaced, it can be purchased under Part #0514704AA. Verify the proper engine oil and run engine to check for leaks.
The AERA Technical Committe |
| VALVE STEM SEAL INSTALLATION |
Caution On Installing Valve Stem Seals On
Chrysler, Dodge, Plymouth 5.2, 5.5, 5.8, 6.6 & 7.2L Engines
When installing intake valve stem seals in the subject engines, often the seals are crushed if the valve springs are excessively compressed during installation of valve keepers. Using the valve stem as a guide, the intake valve stem seals should be pressed firmly and squarely over the valve guides.
CAUTION: When installing valve retainer locks, compress the springs just enough to complete the operation. Do not force the seals against the top of the guides.
The AERA Technical Committee |
| SPARK KNOCK (DETONATION) |
Reducing Spark Knock (Detonation)
Chrysler Corporation has authorized a field fix for the purpose of reducing the possibility of spark knock (detonation) on 1979 passenger cars equipped with Federal 3.7L (225 CID) engines, 2BBL carburetor and automatic transmissions; and 1979 passenger cars and light-duty trucks equipped with 5.9L (360 CID) engines, 4BBL carburetor, California Emission Package and automatic
transmissions.
The recommendation is to change the timing as follows:
Passenger cars with Federal 3.7L (225 CID) engines -- From 12° to 8° BTDC
Passenger cars with 5.9L (360 CID) engines -- From 16° to 12° ± 2°
Light-duty trucks with 5.9L (360 CID) engines -- From 10° to 6° BTDC
After resetting the timing; idle set speed, propane idle speed, and hot fat idle speed should be checked and reset, if necessary, to conform to the specification on the vehicle emission label.
NOTE: It is mandatory that a new emission label be applied over the existing lain the engine compartment. Labels are available from your local Chrysler and Dodge dealers.
The AERA Technical Committee |
| EXHAUST MANIFOLD BOLT CAUTION |
Exhaust Manifold Bolt Caution On
1998-2001 Chrysler 5.9L VIN 6 & 7 Diesel Engines
AERA members have reported an exhaust manifold bolt caution on 1998-2001 Chrysler 5.9L VIN 6 & 7 diesel engines. This information pertains to the 24-valve engine that are used in Dodge Ram Trucks built on or between engine serial number 564198738 and 56777585. Those engines carry a date of engine manufacture from January 01, 1998 to September 22, 2000.
Vehicles that are used for extended heavy trailer towing purposes may experience a loss or reduction of exhaust manifold bolt torque. When this happens, ?exhaust gas blow-by" is allowed to go past the exhaust manifold gasket(s) and even loss of exhaust manifold bolts may occur.
To reduce the likelihood of this condition reoccurring, Chrysler offers an exhaust manifold bolt retention strap. This strap will provide a means of locking the outboard exhaust manifold bolts in place. The strap will prevent bolt retention and torque loss during the thermal expansion process of the exhaust manifold.
If any bolts are missing, replace bolts before installation of the retention strap. Once all bolts are in place, verify that they are torqued to 32 ft/lbs. Install the retention strap on top of the bolt head, not underneath. The removal of the exhaust manifold bolt is not necessary when installing the retention strap.
The strap is a one-time use only. If damaged during installation, the strap must be replaced with a new one. Using a 14mm socket and hammer, install the strap over the head of the bolts until it just begins to contact the bottom of the bolt head. Installing the strap too far down onto the bolt head may cause the hole in the strap to expand too much and become loose.
The AERA Technical Committee |
| OIL PUMP INSTALLATION |
Oil Pump Installation On
1962-81 Chrysler (Plymouth Dodge) V-8
4.5L, 5.2L, 5.5L & 5.9L (273, 318, 340 & 360 CID) Engines
Improper oil pump installations in the subject engine shave
resulted in serious problems and damage. When installing the oil
pump, make sure the mounting neck is fully inserted in the
mounting hole in the block and remains fully inserted while
mounting bolts are being installed and fully tightened down.
This is particularly true of the outboard mounting bolt, as the
tendency is to let the pump slide out of position while the bolt
is being installed. This error causes the pump to be misaligned
in the block and results in fracture of the mounting neck. this,
in turn, can lead to other serious difficulties such as breakage
of the oil pump hex drive and may eventually cause complete oil
pump failure.
CAUTION: Be sure that the main cap bolt head next to the oil
pump housing is square with the side of the cap as shown in the
diagram below.
(Insert Illustration)
The AERA Technical Committee
April 1984 - SPB 112
##END## |
