Category Archives for Engine News

Valve Spring Retainers Now Have Thicker Flanges

All 3208 Industrial, Marine, Generator Set Engines Reference: “Larger Valve Springs,” May 20, 1981 Engine News, page 5. Description of Change: The flange thickness has been increased on the valve spring retainers for all 3208 Industrial, Marine and Generator Set … Continue reading

28. February 2019 by sam
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Remanufactured Cylinder Head Groups

3208, 3306, 3406 And 3408 Engines An article on this same subject was published in Engine News, February 22, 1984. The earlier article did not have complete information. Put a mark through the earlier article and make reference to this … Continue reading

28. February 2019 by sam
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Valve Lash Adjustment Not A Warranty Item

All Caterpillar Engines Valve lash adjustment is a normal part of engine maintenance and should not be claimed as a warranty item. If the valve train must be removed or disturbed to do warranty work on other engine components, then … Continue reading

28. February 2019 by sam
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Visual Inspection Can Detect Chrome Plated Engine Valves

Rebuilt engine valves can sometimes be mistaken for new Caterpillar engine valves. Some engine component rebuilders supply used Caterpillar engine valves that have had their stem diameters built up by a chrome plating process. Close visual inspection of a valve … Continue reading

28. February 2019 by sam
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Use Care When Handling Water Seals For Cylinder Head Spacer Plates

All 3400 Series Engines Petroleum products can damage the rubber used in spacer plate water seals (4W1055 Seal). This damage can be caused by the use of a water soluble oil in the cooling system or by contamination during maintenance … Continue reading

28. February 2019 by sam
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Reusability of Exhaust Valves in All Caterpillar Engines

Several questions have surfaced regarding the reusability of exhaust valves in cylinder heads reconditioned by dealers and Caterpillar Remanufacturing. The biggest contributor to the confusion, regarding exhaust valve reuse, are product problems. These product problems have a direct effect on … Continue reading

28. February 2019 by sam
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Recommended Repairs After Cylinder Head Gasket Failure

All 3306 and 3400 Commercial Engines Caterpillar recommends that the cylinder packs be removed when a failed cylinder head gasket compression seal is accompanied by the presence of combustion gas present in the cooling system. The cylinder packs must be … Continue reading

28. February 2019 by sam
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Tolerance Added To Valve Clearance Specifications

All Caterpillar Engines Description of Change: A tolerance of plus or minus .003″ (0.08 mm) has been added to all engine valve clearance specifications for Caterpillar engines in all applications. The new tolerance does not change the basic clearance specifications … Continue reading

28. February 2019 by sam
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Use Again Specifications For Valve Springs Are Changed

All Engines Description of Change: There have been changes in the use again specifications for valve springs. Valve spring specifications are given in the Service Manuals and in Guideline for Reusable Parts-Valve and Valve Springs, Form No. SEBF8002. The new … Continue reading

28. February 2019 by sam
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Use Caution During Replacement Of Damaged Nozzle Adapters Or Precombustion Chambers

Coolant leakage through a damaged precombustion chamber or fuel nozzle adapter and into a cylinder creates a potentially dangerous situation. Rotation of the crankshaft can push coolant out of the cylinder with enough force to severely injure a serviceman. Through … Continue reading

28. February 2019 by sam
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