More problems, bought this 850 a week ago with only 76,000 miles. replaced thermostat because overheating. Now there is white smoke coming from the tailpipe at idle. does this mean I have a bad head gasket and how is it to do myself. car runs good, good power transmission good. but there is no wayit will pass smog inspection this way. help please.

 

Here is a thread from the past on this subject:

https://volvoforums.com/m_60349/tm.htm