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SPARK PŁUG HEAT RANGĘ

Volkswagen-approved spark plugs furnish the correct "heat rangę" for both city driving and continuous high speed service. "Heat rangę" refers to the ability of a spark pług to transfer ccmbustion heat away to the engine's cooling system; this is controlled basically by the length of the insulator firing end.

TEMPERATURĘ

MEASURING

DEVICE

COLD TYPE    HOT TYPE

(Short Heat Path) (Long Heat Path)

*

Exact matching of spark pług heat rangę to the Volkswagen engine is acccmplished w i t h Champion iaboratory — type Themocouple pługs. By this means, actual insulator tempera-tures are accurately measured under all operating conditions.

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