2004 XC90 T6 Engine swap?

[Azik09]

A B6284T out of a 1999 –2002 Volvo S80 T6 would work also. Would lose 139 CC of displacement but it is a direct drop in replacement.

The difference is not only in displacement. B6294T has VVT and camshaft sensors on both camshafts, B6284T on exhaust camshaft only.

[RickHaleParker]

The difference is not only in displacement. B6294T has VVT and camshaft sensors on both camshafts, B6284T on exhaust camshaft only.

Transfer the Intake VVT from the old B6294T to the B6284T.

[GonzoGirl5]

I am not so concerned with coolant in the oil - coolant prevents rust. I am more concerned with why it blew the head gasket and how long it was run in said condition. Coolant is not a lubricant like oil and if it ran too long it can destroy the pistons, rings and/or cylinder walls. One only knows when the head is pulled and the block can be inspected.

I have done several head gaskets with milkshake oil without any issues. I have done one, a 2004 S80 2.9, that was driven too long with the milk shake mix (how I bought it) where I had to replace one set of piston rings and hone one cylinder wall. It came out fine.

If you plan on doing it yourself and do not have a lift and/or proper space the head gasket is easier. If you are going to have someone do it, a used engine will come out cheaper.

This is what I was thinking as well. I don't really know how long it was running like this and why it happened. I do know that it was not very long at all as I regularly check all my fluids etc. It had been losing coolant but I couldn't figure out where. It didn't overheat on me regularly at all. I do live at 6000' up miles of dirt roads to get home. The entire way being up a mountain so it is well used to say the least. I do not think that the pistons and/or cylinder walls are destroyed. It all happened very quickly and close to home.