hi guys, I'm from Australia and driving vectra c with z22se 171k km I have mini cracks around spark plug no.4.
I would like to know how long it takes the head for a complete failure, and is there a solution before the cracks reach the water channels?
coolant still clear oil fairly clean after 1000km (rings I believe), Im changing it every 3 months or 1k km (10w40) full synthetic.
car has new GM chain kit, pcv cleaned, new spark plugs, new valves seals
compression test 180psi on 1,2,3 and 178psi on 4.
Oil consumption 0.8 - 0.9L/1000 car drives ok.
And it's not because I'm over titting the plug I use the right torque specs I believe it's a deffect in the design.
I would like to know how long it takes the head for a complete failure, and is there a solution before the cracks reach the water channels?
coolant still clear oil fairly clean after 1000km (rings I believe), Im changing it every 3 months or 1k km (10w40) full synthetic.
car has new GM chain kit, pcv cleaned, new spark plugs, new valves seals
compression test 180psi on 1,2,3 and 178psi on 4.
Oil consumption 0.8 - 0.9L/1000 car drives ok.
And it's not because I'm over titting the plug I use the right torque specs I believe it's a deffect in the design.