The problem is that as soon as you shut down the engine, the oil pump stops. This does not cause a problem while the car is running, because the oil pump keep recirculating the oil around, so it doesn't stay in the turbo long enough to burn (and it has that nice oil cooler next to the main radiator as well). The effect of oil cooling is less, and thus these units ran MUCH hotter than later, water cooled turbos - after a long drive they could be glowing red! This is hot. The reason the two minute cool down period was required is that so called 'first generation' turbos had oil cooling, but no water cooling. Yours ('86) should have water cooling, and thus only require a few seconds. The figure of a minute or two before shutdown was relevant for the older, non water cooled turbos. Turbo Has Power Loss and Cherry Manifold: Knock SensorĮxhaust Manifold Gasket & Studs Turbo to Manifold Joint ![]() No-Hot-Restart Problem: Boost Overpressure Switch Failure ![]() Slow Throttle Response After Turbo Replaced Diagnosisħ40T Has Weird Deceleration Anti-Stall Valve Hose Turbo Blows Black Smoke Poor Acceleration Hesitation Turbo Performance Problems Solved by Checking the Little Things ![]() ![]() Gasoline Recommendations for Turbo Engines
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