[altima713]

I was thinking about seafoaming my 1990 300zx n/a.....It has about 98000 miles on it...I heard it messes up the seals n such, but I thought I make sure...Has anyone done it to there Z' yet? Should I do it?

 

[MikeBike]

Ive done it on a Freshly swapped TT. I do not think it will damage any seal unless the seal is already leaking real bad.
BTW, get ready for a smoke show.