[scott181]

Thanks, came to the same conclusion. I replaced the expansion tank cap and now nothing out the overflow. Ran nice for 20 minutes in the driveway with no overheating at an idle. Drove it less then a mile and temp started climbing fast, got it back home and had lots of white smoke out the exhaust. Got someone wanting to sell me a 1998 sunfire with the 2.4 engine in it that runs great. Will this bolt up in my 2000 with the 2.2??? Gonna be a simple engine swap, or am I gonna run into problems with motor mounts or wiring harness???