I have worked recently on the UIM replacement, LIM gaskets, water pump and coolant elbows. buttoned everything up, no evident leaks, not burning coolant, no smell in exhaust. I have been having issues with fluctuating temps as listed above. i have also replaced the radiator cap with a murray locking cap, i think it may be my problem. it doesnt seem to seal as well as the stock, and i need to do a UV dye leak test to see if its pushing out from the ring. I do not hear hissing when i stop from driving that would normally come from a leak...i did the complete bleed steps, etc and somehow i still am low on coolant after about a week of driving. it may be time to replace my rad, it is 13 yrs old. every time i open up the rad cap, there is brown gunk on the gasket...did a flush a little while back, and this stuff is still present. any ideas?
