Engine - Cold Temperature Starting Recommendations

82isuzu01 BI82-111

OCTOBER 28 , 1982

ENGINE


COLD WEATHER PREPARATION FOR DIESELS


MODELS AFFECTED

All Isuzu Diesels

SERVICE INFORMATION

Diesel engines are more sensitive to cold ambient temperatures than gasoline engines. Due to the higher compression ratio in a diesel, any decrease in the ability of a diesel engine to turn over while starting in cold weather also decreases cold start performance. Diesel fuel waxing problems also affect cold start and operation.

Several steps can be taken by owners of Isuzu diesels to insure top cold

weather performance:

1. When sustained high speed operation is not anticipated, use a 5W-30 viscosity motor oil. Thinner viscosity oils make it easier for the engine to turn while cranking. 5W-30 oils are not recommended for sustained high speed operation.

2. Install an engine block heater. The following block heaters are available from the AIMI Parts Department:

VEHICLE PART NUMBER DEALER COST

I-Mark Diesel 8-94233-241-0 10.86
P'UP Diesel 8-94241-380-0 10.86

3. Always use either number 1 or "Winterized" number 2 diesel fuel when temperatures are expected to be below 20~F.

SPECIAL CAUTION

Adding up to 20% unleaded gasoline to unwinterized number 2 diesel fuel is allowed in emergency situations only. Gasoline/diesel fuel mixing will adversely affect engine noise, fuel economy, durability, and warm engine starting. See Bulletin BI82-101 "Mixing Diesel Fuel and Unleaded Gasoline" in the Miscellaneous Section of your Service Bulletin Binder for details.

Following these recommendations will insure problem free winter operation for your Isuzu diesel customers.