BOLT 1958271 - Caterpillar

If equipped with an air inlet heater (AIH) for cold weather starting, do not use types of starting aids such as ether. Such use could result in an explosion and injury.
When starting the engine with ether, follow these starting procedure instructions carefully. Use ether sparingly and spray it ONLY WHILE CRANKING THE ENGINE. Excessive ether use can cause piston and ring damage. Ether should be used only for cold weather starting.
Table 1
Medium and Heavy-Duty On-Highway Engines (1)
Cold Weather Recommendations    
Starting Aids    
Expected Coldest Temperature     Ether Injection (2)
OR
Air Inlet Heater     Cylinder Block Coolant Heater     Larger Battery
Larger Alternator    
Above
−7 °C (19 °F)     Available     Available     Available    
−7 °C (19 °F) to
−18 °C (0 °F)     Available     Available     Available    
−18 °C (0 °F) to
−28 °C (−18 °F)     Recommended     Required     Recommended    
−28 °C (−18 °F) to
−40 °C (−40 °F)     Recommended     Required     Required    
Less than
−40 °C (−40 °F)     Required     Required     Required    
( 1 ) Options may not be available for all models.
( 2 ) If the engine is equipped with an air inlet heater (AIH) for cold weather starting, do not use types of starting aids such as ether. Such use could result in an explosion and injury.
Table 2
Medium and Heavy-Duty On-Highway Engines (1)
Cold Weather Recommendations    
Improvements for Engine Warm-Up
Improvements for Idle Temperature    
Expected Coldest Temperature     Hand Throttles     Winter Fronts
Shutters     Air Cleaners
Located Under the Hood     On/Off
Fan Drives     BrakeSavers
Exhaust Restrictors    
Above
−7 °C (19 °F)     Available     Available     Available     Available     Available    
−7 °C (19 °F) to
−18 °C (0 °F)     Available     Recommended     Recommended     Recommended     Available    
−18 °C (0 °F) to
−28 °C (−18 °F)     Recommended     Required     Recommended     Required     Recommended    
−28 °C (−18 °F) to
−40 °C (−40 °F)     Required     Required     Recommended     Required     Recommended    
Less than
−40 °C (−40 °F)     Required     Required     Recommended     Required     Required    
( 1 ) Options may not be available for all models.