ok before it was blue...pcv valve replaced bam no more. gm 290hp 350...smokes white...maybe im just retarted and it is steam but heres my story... NOW intital start up puff of white i think ok jstu the gas. drive to mc donalds (MAYBe 1/2mi away) on break sittin in line look back adn i see a CLOUD of smoke....now its maybe 80-85 not exaclty "steam" weather. i look down and temp gauge is at 1/2 normaly round 1/4 think great ****in head gasket. baby it back to work...still smoking. leave wokr 3 hours later. get home no smoke just hte typical steam (70ihsh now) today same ****. wtf giveS? im thinkin the temp gauge could be a stickin thermostat...maybe i dotn think im loosing coolant motor was put in 3000mi ago. radiator,motor,and over flow were filled. now overflow is almost empyy but radiator is normal...is this normaL? was there maybe air pockets in the motor and now theyre filled? the coolant and oil both look normal. im stumped gonna do a compressiont est prob thurs. so well see. the standard is about 90psi right?