1984/10/24 Caterpillar

New Cylinder Head Gasket Helps Prevent Oil Leakage Around Gear Pocket

Usage:

All D348 Engines

SUPPLEMENT: 07/00/87

ENGINE NEWS, OCTOBER 24, 1984, PAGE 10.

The article "New Cylinder Head Gasket Helps Prevent Oil Leakage Around Gear Pocket" gives information on a new cylinder head gasket for D348 Engines. Since the article was published, additional gaskets have become available for this and other 5.4" Bore Engines. Put a mark through the above article and make reference to the article "New Cylinder Head And Spacer Plate Gaskets Prevent Oil Leakage Around Gear Pocket" in this issue.

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Description of Change: A new cylinder head gasket is available for use in all D348 Engines. The new gasket has a rubber, multiple bead insert which helps prevent oil leakage in the area around the gear pocket.

Adaptable As: The new 4W7598 Cylinder Head Gasket is a direct replacement for the former 7N9527 Cylinder Head Gasket which has been canceled.

Caterpillar Information System:

1984/10/24 Wiring Changed On Voltage Regulators

1984/10/24 Deflection Of Flywheel Housings Should Be Controlled During Transportation

1984/10/24 New Heat Shield For Wiring To Electrical Shutoff Group

1984/10/24 New Heat Exchanger Group Has More Cooling Capacity

1984/10/24 Changes To Water Lines Group Increase Coolant Flow Through Exhaust Manifold

1984/10/24 New Indicator Lamps Used On Generator Control Panels

1984/10/24 New Gaskets Give A Better Seal To Watercooled Exhaust Manifolds

1984/10/24 Helper Spring Groups Improve Operation Of Air Shutoff Groups

1984/10/24 Cetane Injection Group Uses New Orifice, Tee and Seals

1984/10/24 Improvements Made To Fuel Filter Housing

1984/10/24 New Outer Bearing Race Used In Auxiliary Fan Drive Group

1984/10/24 New Cylinder Heads, Fuel Nozzles And Fuel Nozzle Adapters Used

1984/12/12 Additional Information For Correct Fuel Injector Timing

1984/12/12 Causes And Correction Of Opposite Crankshaft Rotation In Direct Injection Engines

1984/12/12 New Pressure Gauges Have Dual Scales [kPa (psi)]

1984/12/12 A Soot Filter Is Available For Use With Air Cleaners

1984/12/12 Improved Turbocharger Oil Drain Elbows

1984/12/12 Remanufactured Turbocharger Groups

1984/12/12 Thread Identification Kit Available

1984/12/12 Starters That Remain Engaged After Engine Is Running

1984/12/12 New 76.6°C (170°F) Water Temperature Regulators Used In Inlet Controlled Cooling Systems

1984/12/12 Additional Clamp Reduces Vibration Of Turbocharger Oil Supply Line

1984/12/12 Addition Of Lubricator Will Help Prevent Corrosion In Air Prelube Motors

1984/12/12 Preferred Engine Timing Procedures