Category Archives for Engine News

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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Engine Valve Stem “Use Again” Specifications

All Caterpillar Engines The current Guideline For Reusable Parts “Valves and Valve Spring Specifications,” Form SEBF8034-03 has some “use again” minimum valve stem diameters that are different from those in Form SEBF8034-02. The metric “use again” minimum valve stem diameters … Continue reading

28. February 2019 by sam
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Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures

All Engines This article is a reprint of an earlier article which was in Engines News, January 18, 1978. According to field reports, some customers have had problems with damage to engine valve components during operation in very cold temperature … Continue reading

28. February 2019 by sam
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Check For Interference Between Water Temperature Regulator And Cylinder Head Bore

3300 Series Engines Reports indicate that some 3300 Series Engines with 7N208 Water Temperature Regulators have experienced overcooling or cooling system pressure surges. In many cases this problem is caused by interference between the water temperature regulator guide tabs and … Continue reading

28. February 2019 by sam
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Determining The Cause Of Glow Plug Tip Failures

There are basically four causes for complete glow plug failures: … Counterfeit or imitation glow plugs do not have the life or strength of a genuine Caterpillar glow plug. … Using a voltage that is too high – for example … Continue reading

28. February 2019 by sam
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Valve Lash Adjustment Interval Is Changed

All Engines Used In All Applications Reference: Engine News, January 16, 1985, Page 2, “Valve Lash Adjustment Not A Warranty Item”. Engine News, April 1986, Page 3, “Adjust Bridge Whenever Valve Clearance Adjustments Are Made”. Valve lash adjustment procedures are … Continue reading

28. February 2019 by sam
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Salvage Of Cylinder Heads By Using Oversized Valve Guides And Valve Inserts

All Caterpillar Diesel And Spark Ignited Engines, Except 3200, 3500 And 3600 Families Of Engines SUPPLEMENT: 02/00/89 ENGINE NEWS, APRIL 1987, PAGE 8, “Salvage Of Cylinder Heads By Using Oversized Valve Guides And Valve Inserts” in all engines except 3200, … Continue reading

28. February 2019 by sam
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Silicone Water Passage Seal Can Be Used Where Contact With Oil Is Unavoidable During Assembly Of Cylinder Heads

3300 Family Of Engines The 4W8087 EPDM Water Seal (red) that is used on the 3300 Family of engines is not compatible with oil. The 9Y1798 Water Seal (yellow) is made of silicone and has a nylon insert. The 9Y1798 … Continue reading

28. February 2019 by sam
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New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads

There has been some customer concern regarding the use of Remanufactured exhaust valves with Remanufactured cylinder heads in certain applications. The decision to use NEW exhaust valves in Remanufactured cylinder heads will enable the customer to choose Remanufactured cylinder head … Continue reading

28. February 2019 by sam
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New Valve Guide Available

3304 And 3306 Diesel Commercial Engines Description of Change: A new valve guide is available for the 3304 and 3306 Diesel Commercial Engines. This new valve guide is produced with powdered metal technology. The new valve guide will provide increased … Continue reading

28. February 2019 by sam
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