1993 Nissan Patrol Safari 4 2 Efi Engine Pressurised Cooling System Sytems

1993 NISSAN PATROL/SAFARI
300,000 MILES
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4.2 EFI engine has a pressurised cooling system. the sytems dumps the coolant into the overflow tank which then empties thru the overflow pipe. this happens as the engine is warming up. any ideas what is causing this to happen. Thanks
Apr 4, 2013 at 1:00 PM
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KHLOW2008
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Either the radiator cap is bad or you have excessive pressure in the system whcih could mean a bad head gasket.
Apr 18, 2013 at 7:58 AM
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