1987 supra turbo ?'s

[DaBoss07]

A little bit less expected than what I saw yesterday. Drove out to see this supra yesterday and just to say a couple of things were wrong with it.

Windsheild had a crack in the top left corner coming across,
the door handles were a little loose,
normal wear and tear on the outside (paint starting to fade),
looked and sounded like the radiator fan was knocking a little bit when we got up to speed,
I dont know if it was the turbo but something to the left was making a clug clug clug sound when it idled and drove,
also there was white smoke coming out of the back on occasion (he said it was from the fuel injector cleaner that his son added and he didnt know why it was smoking, said it had never done that before and they were running premium fuel in it), I think its from getting water in the block and or the head gasket.....but they said they replaced the head gasket a little bit ago.

If I can find out the reason of the white smoke would be great.....cause thats the only thing that bothered me really. If someone can give me some advice that would be great.