Coolant in oil Avensis 2007 1.8 vvti

[Toylota]

Went for an oil change today and discovered coolant mixed in with the oil (red colour) Toyota Avensis 2007 1.8 vvti. Car ran fine until just before oil change when idle became rough. Is this likely a head gasket or could it be the oil cooler or possibly something else? No overheating or residue on oil cap. Thanks in advance 

[2009joe]

1 hour ago, Toylota said:

Went for an oil change today and discovered coolant mixed in with the oil (red colour) Toyota Avensis 2007 1.8 vvti. Car ran fine until just before oil change when idle became rough. Is this likely a head gasket or could it be the oil cooler or possibly something else? No overheating or residue on oil cap. Thanks in advance 

by chance when you start your car do you see bubbles coming from the coolant bottle do you notice when your car is running there is more pressure in the coolant bottle than normal or do u have a wet patch on the ground as coolant coming out when pressurising the bottle .thats what it did to my older vw 1.9tdi 

[Toylota]

Hi thanks for your reply. The coolant disappeared from it’s reservoir into the engine so unable to see any bubbles in that. No coolant on the floor, no residue on oil filler cap and no overheating prior to discovering the coolant in the oil.

 

[2009joe]

49 minutes ago, Toylota said:

Hi thanks for your reply. The coolant disappeared from it’s reservoir into the engine so unable to see any bubbles in that. No coolant on the floor, no residue on oil filler cap and no overheating prior to discovering the coolant in the oil.

 

Think petrol Toyota engines like yours had always a problem with head gaskets going .when you fill up the bottle dose it take away the collant that fast that can't check if u see if bubbles coming in bottle or pressures in the system. I think there are kits out there that can check if exhaust gases in the coolant. I had a head gasket problem with my last car and we'll was kina wondering why as 125k on a 1.9tdi engine . Either way crappy cheap engine oil or after 5 car old I changed the coolant myself to those motorfactor coolant .kina half thinking how would cheap engine oil cause that as the gasket goes from the piston part to collant area I'm thinking cheap oil hardly cause that maybe non genuine Toyota collant .

 

[Toylota]

Thanks for your reply. It’s looking like a head gasket at the moment 🙁

[Derek.w]

I check out the turbo then the head gasket.

[Konrad C]

11 hours ago, Derek.w said:

I check out the turbo then the head gasket.

As the title states, the engine is 1.8 vvti, which is a petrol engine, so no turbo (unless one was added as a modification).
I think the head gasket has failed, going by the OP's posts.