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The glow plugs do not heat the air. They are activated for a few seconds prior to starting the engine to heat up the engine to ensure that the diesel fuel flows properly and ignites properly.
When you compress air by any method, it becomes significantly hotter. Hot air going into an engine actually significantly decreases the power that is generated from detonation. The intercooler removes heat from the compressed air so that it more closely matches the ambient outside temperature resulting in increased performance.
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Toyotas in the family/next of kin:
1982 Corolla Wagon, 1989 Corolla DX, 1991 Previa LE, 1993 Previa LE,
1993 Pickup, 1994 Corolla DX, 1995 Avalon XL, 1996 Camry XLE, 1998 Avalon XL,
1998 Sienna CE, 1999 Camry XL, 2000 Camry XLE, 2002 Tundra, 2003 Tundra,
2003 ES 300, 2004 Camry XLE, 2005 Tacoma
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Deiselengines
Linear Mode
