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94 Legacy compression test, plug socket size???

romcat
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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Hi Soobers:

 

I'm looking at a beautiful `94 Legacy Alpine Sport Wagon to buy and I'm having a friend swing by and do a compression test.

 

Does anyone know what spark plug socket he should take? I can't find the info on line. It seems 5/8th is right, can anyone help???

 

Thanks,

Gareth

(`93 Loyale AWD)

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