i have a 94 lt1 camaro and the car is at normal operating temp., but still no heat. ive replaced the t-stat, i did a heater core, and i flushed the whole system twice. all the cables and junk on the inside are in perfect working order, and the best heat i can get is only luke warm. am i missing something here? thanks for any help!
Chris

 

During your flushing, did you pressure flush the heater core? Check the hoses going to the heater, they both should be at the same temp as the radiator hoses. If they are running cool, the heater core is clogged.

 

i did the flushing after i had the new core in. the heat was working alright, and then it just stopped. how would i go about unclogging my new heater core?

 

Diconnect both heter hoses from front of engine, stick the end of a garden hose with a nozzle into one of the hoses and force water through it till it comes out the other hose.