Yesterday we installed a head on my car. It went good until we started it. I had white steam coming from the head. The 2 cylinder had coolant all over it so we did a compression test. Results are 210-165-210-210. We knew we had to pull the head and check some stuff out. When we pulled it we saw this little gouge in the head. My friend thinks its the water way but not that I looked at it more I think it is the oil passage in the head. He was thinking it was leaking into that combustion chamber and causing it to smoke. Here are some pics of the gouge. The car is a 01 GSR and it is a P72 head worked with skunk 2 valvetrain





IS that a waterway and if it is can that cause what I was describing. It goes clean through from the hole to the combustion chamber (the gouge). If that is a return line Im guessing that my head is warped or something. Everyone post up what u think. Thanks.

 

it could be that gouge or the number two cylinder not sealing the right way. did you reuse the headgasket?

 

no it was a brand new Mugen gasket.

 

That is a water passage way next to the gouge, you will need to have the cylinder head surfaced to get rid of the gouge, so it will seal.

 

thats a coolant passage, the oil goes thru the oil jet on the back side and back into the block on those big oval things on the back and the oval looking thinks on the front on the far sides... that really dosnet make sence but oh well

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itaintegra52 &raquo;</TD></TR><TR><TD CLASS="quote">That is a water passage way next to the gouge, you will need to have the cylinder head surfaced to get rid of the gouge, so it will seal.</TD></TR></TABLE>

this is what i was hoping to hear. Here is my situation. I was using a Mugen headgasket before. Since I have to resurface the head what is the max I can mill off the head to still be able to use anonther Mugen headgasket (im not a big fan of milling id rahter have the gasket there. Or should I just mill the head lets say .020 and use a OEM gasket. Here is what I had planned if the gouge is less than .010 I will get it resurfaced and order a new mugen gasket. If its .010 or more I will just tell them to mill it .020 and I will use a OEM gasket. Please help on this I need to do it fast. Oh yeah the cams being used are S2S2


Modified by Boost2NA at 11:49 PM 3/20/2004

 

I had a similar problem in where
cylinder 1 and 2 where conected.
took it to local machine shop and the machinist
filled the gap, and it worked..
so you dont have to shave nothing...

 

your pics are really blurry,but the gouge is definately the problem,get the head surfaced to get rid of it.It's your call on the head gasket depending on the amount taken off.Always get the head resurfaced before installing it's not worth the effort of re-doing the whole process for this very problem.

 

so what is the max amount I can take off and still be safe with the skunk 2 stage 2 cams with a mugen gasket. Thanks.

 

1/2" inch, you'll be aight. :-P

bump.

 

Have the head milled to factor min. specs and run the mugen gasket, the machine shop will know what the spec for your head is. We run our race cars at .0025 under min specs so you should be fine with just going to min specs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boost2NA &raquo;</TD></TR><TR><TD CLASS="quote">so what is the max amount I can take off and still be safe with the skunk 2 stage 2 cams with a mugen gasket. Thanks.</TD></TR></TABLE>

anyone..................

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boost2NA &raquo;</TD></TR><TR><TD CLASS="quote">so what is the max amount I can take off and still be safe with the skunk 2 stage 2 cams with a mugen gasket. Thanks.</TD></TR></TABLE>


well i did some math and I came up with running a Mugen headgasket is equal to milling 0.026244094491 off your head. Knowing this, since I have a gouge in it that is prolly more than .004 inch deep im going to just mill the head .020 and run a stock gasket. People say that .030 is the max to go on these heads and I dont want to come close to that or even dare go over it.

 

send it too me i will weld it and mill just a few thou

 

have someone carefully weld it. (pray they dont warp the head) then let them just take a few thousandths out of it.