BMW M3 Forum (E90 E92) - View Single Post - My E90 M3 Dedicated Track build (with pix!)

Richbot · 08-30-2016, 08:27 AM

heh, no, leakdown test is done through the spark plug holes. You pressurize each cylinder with air with the valves closed and see how much leaks past the various sealing surfaces, and how fast.

08-30-2016, 08:27 AM	#333
Richbot Major General 2835 Rep 5,493 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	heh, no, leakdown test is done through the spark plug holes. You pressurize each cylinder with air with the valves closed and see how much leaks past the various sealing surfaces, and how fast. __________________
	Appreciate 0 Quote