1990 Camry smokes on start up

Hi,

I have a 1990 Camry with around 65000 miles. I do not know the engine size or anything about the maintenance history other than the CV joints were recently replaced and the person I bought it from said the oil had been changed regularly. The last oil change was in May, shortly after getting the car. I plan on changing the plugs and wires soon.

I've cleaned the throttle body, although I didn't really do a good job, I didn't have something to really get in there and I don't think I used enough deep creep(first time cleaning a throttle body). The car didn't smoke after cleaning the throttle body, that was in late July. I've also added 1/3 of a bottle of seafoam(small bottle) to my gas tank, but that was about 170 miles ago, also in July.


Three days ago, my car almost didn't start and when it finally did I was surrounded by white/gray looking smoke. The car hadn't been driven in 6 days. The car has been fine since buying it in May (other than a known exhaust leak). The smoke could have been blue, i'm not sure. I have a hole in my exhaust pipe so the smoke just kind of emanated up and around me so it may have been blue but looked gray/white because it was dispersed.

The car does not smoke while driving(that I can see) or for longer than a minute after starting. It starts, smokes, then it's ok. I sometimes go more than a week without driving the car. I rarely drive the car daily. The first time the car smoked upon starting I didn't really notice a smell, it just smelled like exhaust. The next day, the car smoked again upon starting and had a bad odor. I'm not sure I know the smell of burning oil but this was a nasty smell. The best I can describe it is like exhaust only worse. The smoke wasn't as bad and my car wasn't as hard to start the second day either. I checked the oil level today and it was ok.

I've done some research online and my symptoms seem to point to valve stem seals, but i'm no gear head by any means. What do y'all think?