Copper Spray on Headgasket - Yay or Nay

Reply Subscribe

Thread Tools

Search this Thread

Sep 21, 2009, 05:23 PM

#31

wevo1985

Evolved Member

iTrader: (10)

Join Date: Mar 2008

Location: kingston,ny

Posts: 667

Likes: 0

Received 1 Like on 1 Post

ive used the spray on many of my talons and never had a problem. i didnt use it on my build of my evo and unfoutunatly its one of the 1st headgaskits i blew that only leaks under boost.

Reply Like

Sep 21, 2009, 09:00 PM

#32

xRoguex

Evolved Member

iTrader: (15)

Join Date: Apr 2009

Location: Pittsburgh, PA

Posts: 1,666

Likes: 23

Received 11 Likes on 9 Posts

Quote:

Originally Posted by barneyb

Aluminum expands more than cast iron. So, the head is moving on the block every time the engine is run. I can imagine possible benefit from copper spray if running cast iron on cast iron or aluminum on aluminum but less so here.

this is a confusing statement. Let me -- unconfused others.

the point of spraying the individual sides of the MULTI layer metal gasket - is that that particular side adheres to the surface its mated to.

The multi layers - then allow the two to expand and shift at their own pace sliding on one another. While keeping those two surfaces - sealed to the head/block.

This is why you ONLY spray the two sides - NOTHING in the middle.

And this is why you do NOT spray a composite. This would cause the composite to not be able to shift/slide with the different expansion ratios - and it would inherently pull the hg apart.