Yep, PB Blaster. I used to use it way back when on aluminum heads. Hopefully whatever comes in the spray cans hasn't changed too much in the last 45 to 50 years. Actually hadn't realized how long ago it was that I was working in New Paris. You might call that the good old days, or not.....
I buy it by now the gallon with a coupon from advance auto and add a little transmission fluid to it
