Two New Exhaust Manifolds Available For Replacement Of Single Rear Manifold To Prevent Broken Studs
Usage:
3408 Engines In All Applications
Description of Change: Two new exhaust manifolds are available for replacement of the single rear manifold on earlier 3408 Engines. Installation of the two new manifolds will prevent broken manifold studs, which have been a problem for some customers. The new manifolds have a slip-joint connection to prevent stresses on the studs caused by manifold expansion at high temperatures.
Adaptable As: The new 7N5218 Exhaust Manifold (Rear) and 7N5219 Exhaust Manifold (Center) used together, are a direct replacement for the former 4N1676 Exhaust Manifold (Rear) which is canceled.
Caterpillar Information System:
1981/03/04 Check Oil Level Carefully To Prevent Operation With Too Much Oil In Engine Crankcase
1981/03/04 Pipe Plug Added To Rear Of Cylinder Block Prevents Oil Leakage Into Flywheel Housing
1981/03/04 Later Pistons Have A Smaller Number Of Drain Holes In Oil Ring Groove
1981/03/04 List Of Service Publications
1981/03/04 Two New Oil Filter Assemblies Available; Always Use Correct Oil Filter And Follow Caterpillar Change Intervals
1981/03/04 Changes Have Been Made To Caterpillar Service Literature
1981/03/04 High Concentration Of Aluminum In Oil Analysis Can Be The Result Of Rocker Arm Support Wear
1981/01/28 Corrected "5.4" 60°V Main Bearing Selection Guide" Is Now Available
1981/01/28 New, One-Piece Valve Lifter Used
1981/01/28 New Camshaft Has Improved Profile (Shape) Of Exhaust Cam To Extend Service Life
1981/01/28 New Aftercooler Core Has Copper-Nickel Tubes For Increased Strength
1981/01/28 New Exhaust Manifold Has Slip-Joint Connections
1981/04/01 Special Studs And Nuts Available For Exhaust Manifolds On Engines Used In Heavy Load Conditions
1981/04/01 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1981/04/01 Brass Plug Now Used Instead Of Steel Plug In Sea Water Aftercooler
1981/04/01 New Inlet And Exhaust Valves And Valve Guides Have Tighter Fit To Prevent Corrosion And Guide Wear
1981/04/01 Different O-Ring Seal Now Used On The Oil Pump Suction Tube
1981/04/01 New Shield Assemblies Used In Water Shielded Manifold Group
1981/04/01 Test Procedure For Exciter Reactors On SRSE Generators
1981/04/01 Correct Installation Of Inserts Necessary During Repairs To Prevent More Counterbore Cracks
1981/04/01 6V4009 Dowel Driver Available
1981/04/01 Fuel Pressure Relief Valve Is Shown Inverted (Wrong End Up) In Parts Book Illustrations
1981/04/01 New Aftercooler Core Has Improved Design To Prevent Vibration Damage Which Lets Coolant Into Engine Air Inlet
1981/04/22 Cooling System Cleaner Removes Rust And Corrosion