Toyota 7M-GE
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The 7M-GE and 7M-GTE were both high-performance engines used by Toyota in the 1980's and early 1990's. They are part of the series of Toyota M engine. In the US, only two Toyotas ever featured the engines: the Toyota Cressida and Toyota Supra. Both engines were very advanced for their time. The 7M-GE came standard with the Cressida from 1989-1992, offering loads of power, excellent fuel economy, and proven reliability. The 7M-GTE was simply a turbo version of the 7M-GE offered only in the Supra.
The engines had a 3.0L 24-Valve DOHC Twin Cam setup which provided plenty of power for both the Cressida and Supra. The 7M-GE is an Inline 6, or "straight 6" engine. Due to incorrect torque specifications from the factory, the head gaskets on both the 7M-GE and 7M-GTE engines are prone to failure. However, with proper replacement of the head gasket using a higher torque setting, these engines have been known to be extremely reliable.
The 7M-GE and 7M-GTE were both discontinued sometime after 1992 with the demise of the Cressida in North America.
One of the best replacement head gaskets you can get for this particular supra is one from hks, its cheap, reliable and it fixes that problem permemantly