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International Automotive Technicians Network
Re: 87 Buick t-type
Posted to Technical Discussion Forum on 7/3/2001 3 Replies

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Scott, the main causes of overboost on stock turbo Regals are leaking wastegate vacuum hose asm (GM part # 25525576) and leaking wastegate actuator solenoid valve (1997157) on RH valve cover. The sole... Login to read more.

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