99 venture head gasket???

[Peter E]

Hello folks

I have a 99 venture with 200,000 km on it. Recently it has started to overheat and lose coolant (no external leaks). There is also an occasional misfire code PO302. I pulled the plug on cylinder 2 and it looks fine. There is no coolant in the engine oil, and the rad pressure test came back fine (it held 15 psi for several minutes).

Could it be a bad head gasket and still hold pressure? The car drives fine other than a slight miss, probably ignition related. No puddles or white smoke..

thanks for any advice

[rockwood84]

does the temp gauge fluctuate up and down? or does it just keep getting hotter?look under the oil cap for a white mayonaisse and on oil dipstick. how long since you replaced the thermastat?