2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Visual differences between a S4 and S5 engine?

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Old Aug 5, 2002 | 01:47 PM
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DomFD3S's Avatar
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Visual differences between a S4 and S5 engine?

Can anyone provide the visual differences between a S4 and an S5 engine? The reason I ask is because I just recently acquired a Turbo II (88). The previous owner claims to have dropped in a jspec motor in it, but after having a broken radiator (and replacing it), he couldn't get it to start again. It cranks, but just doesn't start. It may be flooded, but that is not the concern of my at this time. I just want to identify the correct engine. Please provide picture examples if possible.

Thanks.
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Old Aug 5, 2002 | 02:05 PM
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s5 t2's should have 2 tps's

s5 t2's should not have a twin scroll actuator.

s5 t2's should have different stile exhaust manifold and turbo exhaust housing/wastegate.

s5 rx7's use a different oil metering system, although a jspec may be different, not sure.
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Old Aug 5, 2002 | 02:19 PM
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https://www.rx7club.com/forum/showth...threadid=91815
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Old Aug 5, 2002 | 02:20 PM
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Thanks.
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