Is this chip going to be a problem? I just noticed it after I got the head back from the shop. I'll be using a MHG. Should the gasket seal it in pretty well or is this something i need to worry about?
Chip in the head near coolant passage.
- Thread starter bowsercake
- Start date
I would repair it because if I were you I dont want to think about that once the engine is put together and run into problems later down the road.
I think you will be fine. If it was on the edge of a combustion chamber I would be worried but you should seal up AOK
I going to use the copper HG sealant so hopefully that will seal in the coolant along with the higher torque of ARPs.
I would never use a copper spray sealant on a new MHG...you might want to read this:
http://www.supramania.com/forums/showthread.php?t=29335
Using it would be a good way to ensure it doesn't seal
http://www.supramania.com/forums/showthread.php?t=29335
Using it would be a good way to ensure it doesn't seal
ahhh electrolosis!!! i would get that fixed no matter were it is b/c that will just keep getting bigger and BIGGER!
I agree with jdub -
If you are worried about it take it back to the machinist and see what they can do to help you out. They can probably just fill it in a bit with a weld and re-surface it very easily.
If you are worried about it take it back to the machinist and see what they can do to help you out. They can probably just fill it in a bit with a weld and re-surface it very easily.
jdub said:I would never use a copper spray sealant on a new MHG........
Using it would be a good way to ensure it doesn't seal
And where is you're proof of that? I know you say that theoretically it will break down the viton, but in real life experience I have not seen this cause any detrimental effects. I have built lots of engines with copper spray on a new HKS mhg with a 100% success rate. Even if it did break down the (much too thin) viton layer, the copper is still on the gasket surface.
I have, on the other hand, seen engines built with a mhg and no copper spray have slight bhg's where the cooling system gets pressurized from the combustion chamber enough to cause major problems.
I wouldn't say anything if you weren't so vocal about it, but I have seen you posting about it all the time.
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I gotta agree with aaron, I have'nt been able to find any evidence of copper spray affecting the viton seal on a MHG.
What's to say the breaking down of the viton doesn't help the two sealants bond together? They must solidify in some way with heat, or neither would create a permanent seal. Also, did you research which of the chemicals in the copper spray evaporate with heat or just exposure to air?
There is no doubt in my mind that copper spray on an HKS mhg works absolutely great, not in theory, but in reality and in practice. It has been tested on engines that saw all different levels of horsepower and boost, and all different types of abuses from detonation to melted pistons, with no failures of the gasket seal.
There is no doubt in my mind that copper spray on an HKS mhg works absolutely great, not in theory, but in reality and in practice. It has been tested on engines that saw all different levels of horsepower and boost, and all different types of abuses from detonation to melted pistons, with no failures of the gasket seal.
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IIRC, IJ had a BHG when he used a spray sealer on his Cometic MHG...can't remember if it was sprayed with Copper spray or Brake Quiet...I'm thinking Brake quiet.
IJ had a bhg because he was running too lean on propane at very high boost levels. The type of gasket sealer he used, if any, didn't cause the failure. At a certain point, something has to give. Reguardless, I haven't used a Cometic headgasket before, so I can't comment on those.
IIRC, the gasket that IJ blew was a HKS stopper headgasket, that he bought from me, that he didn't use any spray sealant on.
IIRC, the gasket that IJ blew was a HKS stopper headgasket, that he bought from me, that he didn't use any spray sealant on.
The instance I am thinking of was probably close to two years ago now...and he said that something in the brake quiet turns the Viton coating to goo...and that that coupled with his use of green coolant is what caused his BHG around the #6 cylinder... I don't even remember what thread that was in...probably his big build thread which is pretty much stripped now.
Maybe your thinking of a different time? Or maybe I just read wrong...:icon_razz
Maybe your thinking of a different time? Or maybe I just read wrong...:icon_razz
IIRC IJ blamed it on a lot of things....... hehehehe
I think it was later attributed to an insufficent fuel supply. :dunno:
I think it was later attributed to an insufficent fuel supply. :dunno:
HKS USA Chief Engineer Howard Hoshko instructed my friend and I to use copper spray on their gaskets. I'd listen to him before any "internet genius'"
my friend and I are personal friends with him, and most of the good old hks people... so that helps.
jdub said:BTW…I couldn’t get HKS to talk to me
my friend and I are personal friends with him, and most of the good old hks people... so that helps.
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Mine was a Cometic that let go at 30 psi 8300 rpm......
Where it had blown was scoured clean of Viton and the margins of what remained was slime.
The HKS Stopper DIDN'T blow I lost a cylinder after leaning it out during a top end run. (Closed a ring end gap and trashed the bore)
I know it's only anecdotal evidence but I would use that combination again.
As for being an "internet genius" Most of what I post is personal experience nothing more I've never made myslef out to be some genius or guru, I learn by doing not by reading crap posted on the net.
Where it had blown was scoured clean of Viton and the margins of what remained was slime.
The HKS Stopper DIDN'T blow I lost a cylinder after leaning it out during a top end run. (Closed a ring end gap and trashed the bore)
I know it's only anecdotal evidence but I would use that combination again.
As for being an "internet genius" Most of what I post is personal experience nothing more I've never made myslef out to be some genius or guru, I learn by doing not by reading crap posted on the net.