head gasket

[soapymech]

hi all i did a compression test (throttle open) on my low comp engine and got 1/103 2/90 3/100 4/100 are these too low? i did a sniff test on the coolent and came back green instantly so deffo a problem, i have no smoke from rear and no oil and water mix just pressure in water system.:coffee:

[jamie_clioGTT]

yep sounds like headgasket, had that issue on mine, the boost pressurises the coolant system,

[Tony Walker]

Could be hg or liner, check protrusion on the low compression cylinder and for cracks also check gasket and head for flat.