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It's a VX and yes it's an auto. I'll check the trans fluid level and see if it's mysteriously dropped...manifold gasket is new.possibly.
what model commy is it?
Also is it an auto. it's possible that the auto cooler (part of the radiator) has corroded and allowing trans fluid into the radiator.
Also if it is a Ecotec they are prone to the intake manifold gaskets failing at around 150,000kms which can also do this.
Could also be a head gasket but rule the others out first as they are chesper to fix.
Thanks for the reply. Manifold gasket is new so I can rule that out. Hoses seem ok and the coolant level also seems ok. The temp has only shot up a couple of times while driving, and then gone back down again after a few seconds on panicTemp shooting up and down is a sign of an air pocket in the cooling system. Could be caused by a leak, wether from a head gasket, inlet manifold gasket, or just a leaky hose.
Hahahahahaha!! Wouldn't be so confident, who did this work? Rough idle points to inlet manifold, you could have a dodgy install.Manifold gasket is new so I can rule that out