WTF Most MLS head-gaskets don't have coolant holes for all the coolant channel's

[supreamS14]

WTF MLS head-gaskets don't have coolant holes for all the coolant channel's around the combustion chambers. Has anyone seen this before?

There is 4 oval coolant channel hole's around each combustion chamber on the head and block to let coolant cool down the head, block, combustion chamber and the sleeves. Like so \/

On every head-gasket I have seen #4 cylinder has full coolant channel flow \/

But all other cylinder's are missing 2 coolant hole's on one side.

EVEN THE OEM HG\/

I haven't had a problem with this at all. I showed my dad when I was changing a piston I cracked and he said "drill them mofo's out"! So that's what I did! I marked where the head and block had holes and I know I drilled at least 9 holes. It took some time to clean all the metal shards off, get the gasket layers flat/ un-booger-ed and re copper spray to insure a good seal. Plus I was already reusing my cosworth HG, I wanted a good seal.

I wouldn't recommend this to anyone I just want to hear what people have to say as far as input/comments or whatever you want to say.

[slipnfall]

The tiny (1/8") holes in place of the ovals are only there to let air/vapor escape when filling/running.

The head is sufficiently cooled with the head gaskets as-is.

As for side effects, let us know.

[gixxerbob]

power enterprise is the only head gasket company that i know of to advertise increased coolant flow

i figure id add to your thread since you added to mine

[karmakaze]

power enterprise is the only head gasket company that i know of to advertise increased coolant flow

i figure id add to your thread since you added to mine

which is the **** i might add. that's what i run.

[supreamS14]

Looks the same still

But their R&D speaks for its self.

[slipnfall]

That does look like one heck of a HG... 'might have to consider them for my next rebuild!

[shift_SRDETuser]

I have an apexi and crap after reading this thread then I might should go with power enterprise

[the converted]

Could be something to do with the fact that cylinder 4 always runs the leanest/hottest so you move more coolant through that part of the head. Maybe in development Nissan found that the engine ran that way better and just changed the tooling for the gasket instead of retooling the block and head molds?

Just a thought, and I could be wrong.

[supreamS14]

Could be something to do with the fact that cylinder 4 always runs the leanest/hottest so you move more coolant through that part of the head. Maybe in development Nissan found that the engine ran that way better and just changed the tooling for the gasket instead of retooling the block and head molds?Just a thought, and I could be wrong.

I think your right. I'm sure nobody knows the SR20de/det like nissan. My dad worked in a machine shop for many years and insured me that when you make more power than stock there will always be little things you can improve on. He stated " This will increase the circulation of the coolant around the entire sleeve and will eliminate any chance of a hot spot." I said "People run 900whp+ out of these motors and I bet they don't add the extra cooling holes. " He said " They probably haven't thought of it." I trust my dad 100% and what's done is done. I guess we will never know about this for sure unless a company R and D's it. Maby they will see this post and give me a little credit if it works out good.

[Beanstalk]

I think your right. I'm sure nobody knows the SR20de/det like nissan. My dad worked in a machine shop for many years and insured me that when you make more power than stock there will always be little things you can improve on. He stated " This will increase the circulation of the coolant around the entire sleeve and will eliminate any chance of a hot spot." I said "People run 900whp+ out of these motors and I bet they don't add the extra cooling holes. " He said " They probably haven't thought of it." I trust my dad 100% and what's done is done. I guess we will never know about this for sure unless a company R and D's it. Maby they will see this post and give me a little credit if it works out good.

yeah your dad is right and so is converted ford has done the same thing forever ...with trying to re-use as much tooling as possible gaskets are alot faster and cheaper to alter