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Engine Specific Info and Questions => IDI Engine => Topic started by: slorimer on January 17, 2008, 07:54:39 am

Title: What is it?
Post by: slorimer on January 17, 2008, 07:54:39 am

On a Mk3 Jetta.  Where the upper rad hose goes into the engine, there is plastic fitting which bolts to the block.  There are 2 temperature sensors on one side of the plastic fitting, one for the gauge the other for the glow plug timer.  And on the top side of the plastic fitting there is something else that has 4 pins.  Anyone know what it does?