Join Date: Apr 2010
Ferrari Life Posts: 2,196
In the past with composition type head gaskets, there was a good argument for skimming or spraying them.
Today, with elastomer sealing compounds already being applied to high quality head gaskets, the practice of skimming or coating is being discouraged by most manufacturers (of these precoated gaskets), as the skimming/coating compound can sometimes be incompatible with the precoating and/or can interfere with it.
However for old style composition gaskets, I'd think it would still be worthwhile to continue skimming or spraying them.
There's also an argument that the copper based stuff encourages better, more even heat dissipation, and will reduce the possibility of "hot spots" developing? Whether it's true or not, it sounds good from a marketing perspective.
'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084
High mileage, low compression, and missing on a few cylinders.....just like my cars.
Maranello Skunkworks Team Member