I have been having problems with coolant leaking but there does not appear to be any leak that I can see in the car. I have changed the cap which was cracked but the problem persisted. The mechanic has changed the tank, replaced some hose but the coolant continues to leak. Any suggestions?

 

Have you ckd the carpet around the HVAC console in the cab? Heater cores on these cars tend to fail after about 100K mls or so.

See any steam out the tailpipe when you start it up in the morning?