What does the grid heater do?
01-16-2004, 06:52 PM
#16
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I have a melted relay on my truck, so the grids are dead. It lit right off at 4 degrees this morning, no grids, just the block heater. Coldest unheated start so far was 15, lit right off, idled lumpy for 10 seconds while laying down white smoke, then cleared right up. I ain't fixin' it, works fine for me without them.
01-17-2004, 11:04 AM
#17
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Location: Las Cruces, NM
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Originally posted by cp
I thought glow plugs were in the precombustion chamber of IDI heads. I don't know where they're located on direct injection heads. Most DI's don't have them. They heat the air, just like the grid does, only in a different place.
Non-turbo'd diesels generally don't need them so much, as they have higher compression ratios.
I thought glow plugs were in the precombustion chamber of IDI heads. I don't know where they're located on direct injection heads. Most DI's don't have them. They heat the air, just like the grid does, only in a different place.
Non-turbo'd diesels generally don't need them so much, as they have higher compression ratios.
VW also incorporated 3 glow plugs into the water outlet to the heater core to aid interior heat. In my A3, you activate them by putting the fan switch on "3" and heat to maximum, air intake to recirc. I've tested it myself, the interior will warm up far quicker that way than turning the fan to "4".
In the newer A4 TDI's (99 and above), they're controlled automatically depending on temperature.
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