Hello folks, I got this Chrysler 2000 Voyager 4 cylinder Which has a overheating problem. Awhile back noticed car overheated and that both hoses had a swelling look to them. I assumed it was the radiator cap and had it replaced. For 2 days after I installed the new one, the coolant would expand to overflow jug and car did not overheat. Now its happening again and Ive gone thru 2 new radiator caps. My assumption is, its not the caps. What could cause this? Could a hole in the system cause no pressure to not move the rad cap valve (15psi). The oil looks normal, no white smoke at tailpipe, fan kicks in, and no large visible leaks(might not have checked very well) My assumption is that this is a water pump problem. However, I dont see any water seepage from the pump weep hole (if its got one) Another thing is that heater doesnt seem to blow any hot air unless I reach speeds over
40mph. Now I have to leave safety pressure lever on rad cap up and the car doesnt overheat and acts quite normal, however, coolant boils over because of open system and I constantly have to add water every day. Any ideas? Appreciate any advice or help.Edwin