OVERKILL
$100 Site Donor 2021
Originally Posted By: StevieC
Sorry about the cylinder head part, I thought you were talking about the picture of CH combustion side.
As for the varnish... Out of all the engines my dad & I have taken apart and rebuilt or replaced parts in etc. (Tons of these ones in that mix).
We have never seen varnish causing a problem. Sludge/buildup yes, but not varnish. (In the areas that stress oil)
My buddy's high mileage 302 was pretty varnished up. No sludge. He had run GTX for most of the car's tenure under his ownership.
It had stuck rings on 5 of the 8 cylinders.
Different engines respond differently. Ford has been using low-tension rings since the mid-80's, and I imagine they "stick" from varnish/deposits a lot more readily.
Sorry about the cylinder head part, I thought you were talking about the picture of CH combustion side.
As for the varnish... Out of all the engines my dad & I have taken apart and rebuilt or replaced parts in etc. (Tons of these ones in that mix).
We have never seen varnish causing a problem. Sludge/buildup yes, but not varnish. (In the areas that stress oil)
My buddy's high mileage 302 was pretty varnished up. No sludge. He had run GTX for most of the car's tenure under his ownership.
It had stuck rings on 5 of the 8 cylinders.
Different engines respond differently. Ford has been using low-tension rings since the mid-80's, and I imagine they "stick" from varnish/deposits a lot more readily.