Possible HG failure...

[kamilb1998]

Oliver (my 3.6 Sovereign) has recently thrown up the following symptoms...

White smoke out of the exhaust
Oil 'rainbowy' film in the coolant reservoir after standing for a week
Running rich - carbon fouled spark plugs
Lumpy running/missing through the rev range & at idle
The oil level seems to have dropped by a fair amount too

Some guys off another forum said the first suspect would be the headgasket, but I thought I'll get more opinions first before whipping the head off?

[SV8Predator]

Umm,

You will test it before 'whipping off the cylinder head'?

Cylinder compressions.

Cylinder leak test.

Gas in the coolant?

[kamilb1998]

Just been out to move the Jag and the temperature gauge went two dashes above normal at which point I shut it down, and there's oil and coolant pissing out of the headgasket onto the gearbox...

[NormanD]

kamilb1998 said:

Just been out to move the Jag and the temperature gauge went two dashes above normal at which point I shut it down, and there's oil and coolant pissing out of the headgasket onto the gearbox...

I think you may have found the problem