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T-Cut · 14th December 2019, 19:33

If you have doubts, try a fast pressurisation test. With the engine stone cold, open the header and check/adjust the coolant level. Replace cap. Start the engine and with your foot on the throttle, raise the turnover to around 3000rpm. Keep this going for around 30 seconds. Turn engine off. It will still be relatively cool, so remove the pressure cap and see if there's any pressure buildup. If coolant surges into the filler neck or actually overflows, you can be pretty sure the gasket's failed.

EDIT: Make that absolutely sure.

TC

14th December 2019, 19:33	#18
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	If you have doubts, try a fast pressurisation test. With the engine stone cold, open the header and check/adjust the coolant level. Replace cap. Start the engine and with your foot on the throttle, raise the turnover to around 3000rpm. Keep this going for around 30 seconds. Turn engine off. It will still be relatively cool, so remove the pressure cap and see if there's any pressure buildup. If coolant surges into the filler neck or actually overflows, you can be pretty sure the gasket's failed. EDIT: Make that absolutely sure. TC Last edited by T-Cut; 14th December 2019 at 19:36..