Seafoam usage

[Ziegelsteinfaust]

As I mentioned before I killed my last LT1 350 by dropping a bit into the intake. So it was replaced by a iron head LT1 from a Caprice to which I swapped on factory aluminum heads. It looked perfect from the outside, and when I got it. Did fine on a leak down test.

When I started it up after installation. I had a pronounced puffing out of my oil full from blow by. I tried pouring a can of seafoam in the intake. Then with another bottle I put some in the engine, and the rest in the gas.

This cleared up about 1/2 the blow by. Driving the truck around 100 miles did n9t make a perceived gain. #7 cylinder still had 90 psi cranking pressure. With the rest around 180 to 200 psi.

So I order seafoam spray, and fogged down #7 heavily. This solved the problem. I have basically no blow by now or excess crankcase pressure. I will take it on a 200 mile drive this Saturday to visit family, and remeasure #7 cylinder.

So in my opinion. If your going the seafoam route for blow by. Just get the spray, and let it soak for a day or two. Spraying more in every few hours to deep clean.