white smoke...

[twinturbo]

Early DOHC's ( as in the sierra ) had single layer head gaskets. which is prone to failure.

Later Scorpio/Galaxy use a multi layer gasket which is much better.

But the head also does crack between the valves lettign water past and into thebores with no other obvious signs except for possibly full or partial hydualic lock on startup.

If there is absolutly no other sign of a leak then one of the above is the logical conclusion.

TT