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MOTRS

Skyline GT-R (R32 / R33 / R34)

1989-2002 / Coupe / Japan

Common Cooling System

Overheating Under Track Use

Symptoms

Coolant temperature climbs rapidly under sustained high-load driving (track days, spirited mountain driving). The factory cooling system struggles above 110 degrees C.

Cause

The factory radiator is marginally sized for the heat output of the RB26DETT at full boost. The factory thermostat opens at 76.5 degrees C, which is fine for street driving but too warm for track use. Modified cars producing more boost and power generate significantly more heat.

Fix

Upgrade to an aftermarket aluminium radiator with greater capacity ($400-800).

Install a lower-temperature thermostat (68 degrees C).

Add an oil cooler if not already fitted, the RB26 benefits significantly from an oil cooler under track conditions.

Cost: $1,000-2,500 for a complete cooling upgrade.

Cost mentioned in fix
$400-800Cost: $1,000-2,500 for a

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