I have a coolant leak and I can't find the source. The coolant is driping by the passenger side. I've checked the radiator hose and radiator and it was ok. I put the car on the lift and saw some coolant residues by the passenger side but I still can't find were it's coming from. The leak is not severe but it slowly lowered my coolant level. Where else can I check for coolant leaks.

I have a 90ZTT auto.

 

check your water pump on the front cover of the motor, as well as the front cover itself.

 

sounds like you've got a slow leak, i'd go to the local parts store and purchase a small bottle of coolant dye. then drive it around for a couple of days and then check everything over with a UV light. if theres a leak, thats worth worrying about, you'll see it.

 

really the proper way to test it is to use a cooling system pressure tester. I'd use that as well if you can gain access to one.