Please Help! I just had head gaskets timing belt rear main seal and water pump done. I thought since they had the engine out, they would have found all the problems. I had all their recomendations done. But now, it has been down one quart of oil, twice since I had the work done Sept. 1st 2005. They think it is an oil burning problems and are talking about a "short block" $2,100 just for the block not labor. And they also thought it could be the PCV valve which I pray it is of course. And the engine has been revving intermitently when idling. I don't know anything about cars. What do you think? Thanks!!!