started hving problems starting car didnt hv to much luck tok to a pretty repital caddy dealer on top of riping under plastic guard off, then mentioned window regulater is shot thats bout $800.after all that good news they finaly sed engine was/is hydo locked,so before i jump off bridge i say gv me my bill let me get outa here.rolled it back home so i start playin around emptyed oil pan had antifreeze/water in container teseted couple electrical part again cleaned plugs and THINGS took off intake fuel rails and anything eles in the way starterwas bad put new one on thats fine now. did window regulater that works fine.this is the fun part put it back together started rite up sounded pretty good idle for bout2-3 min starts idlng ruff again. so i took apart again cleaned plugs lookin for leaks or whatever.put it together started great sounds good but 2-3 min idle ruff i chk exhaust pipes there alittle water layen inside clean that out.i had put new oil in bout 4th time i chk dipstick looks alittle thinner. i had did alot of reseach on th northtar headgasket/ or watever fails.bout 2yrs ago i put radiater in put few miles on car didnt seem to run hot or leak so never thought anything bout that. seems. when i started having problems tryin to start car thts when i found out all other things. i try to explain TO MY FREINDS if my XLR didnt hv THE LOOK i wud drive it off my cliff. is there any suggestions out there that mite keep me sane. thanks for listing keith