ktm8125

Has anyone copper coated ls9's or just leave them plain

Ferocity02

iTrader: (60)

Do a search, people have done both with good results either way. I put mine in dry, no issues so far.

Sales@Tick

iTrader: (3)

I would copper coat.

PewterZCar

iTrader: (2)

I copper coated mine with great success

RedRocketZ28

iTrader: (19)

Didn't coat mine.

9sectruck

iTrader: (9)

i copper coated every layer, drilled the pop rivets out, laid them on a box in the same order as they came apart, as i coated each layer on both sides i installed them on the engine.

o2camaross

iTrader: (2)

What's the point of copper coating them? And where do you buy the coating? I just put mine in dry

AutomagicLS1

iTrader: (18)

dry here no issues

helga203

How much boost you guys running????

Jose93z28

iTrader: (3)

I installed mine dry, havent got it running yet but im planning on boosting around 15 psi, they say wetter its better lol! But you can pick up that stuff from advance auto, I see a lot of tunners asking for it for turbo hondas and wrx's

driven87

iTrader: (1)

installed mine dry as well and have seen upwards of 24psi here and there

T76s10

iTrader: (6)

mine are also dry.

Stangkilr

iTrader: (47)

Copper coated mine and never had any problems

9sectruck

iTrader: (9)

looking to push mid-high 20s on my lil 5.3 on e85, i figured it cant hurt to coat them all

slowride

iTrader: (3)

Copper coating is for water leaks, it's not going to help a bit with combustion pressure. GM gaskets seal well on most block surfaces. Other gaskets tend to leak more if the deck surfaces are not REALLY smooth so coper spray will help here. You should always be shooting for a nice low RA number(surface finish) on anything high performance with MLS gaskets.

SirNemesis

I had my block and heads machines smooth, so dry install here. 20psi, all good.

helga203

I see you had an s10 with 27psi what did you use on that engine???? Did it last?

ktm8125

I ended up copper coating mine and istalled last night alli have is a jy 4.8 the rings are gapped and a eBay turbo kit with a on3 76mm

02anti_vnm

iTrader: (32)

I actually posted a thread just like this last year and I got a pretty firm NO from some of the bigger names in this section. Made since not to since the ls9 gaskets come factory with a thin coat of rubber around the holes. The felpros and the cometics I had used before were just metal on metal do I coated them. But with the ls9s I say no. However obviously others had and have had great success with it so I say you'll be fine either way...

lsx3151

The first time I did not copper coat and had no issues 24lbs. Second time copper coat and no issues so far 21lbs.