ADA Girdled Head Stud Holes Not Lining Up

[NorrisMike]

I just bought a 2014 SJ that came with a girdled head but without the girdle studs installed. I ordered the stud kit and upon further inspection I noticed there are 2 holes that do not line up (closest to exhaust towards the rear). I tried to search about it and came up with nothing. Do you just drill down through the head holes to open them up?

 

[Roseand]

I had an issue with my head lining for installing the normal head bolts. I just flipped it around and it lined up. I assume it could be similar for the girdle studs.
However I wouldn't just count on that.
When the studs are installed, they do have a little bit of flex to them as well..
Loosen up the head bolts and see if you can move it slightly forward and then flip it around, and then see if the girdle studs slightly flex enough to fit with everything loose.
Worst case scenario you need to drill it out.. But I don't know the effect that'll have on the strength of the casting..

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[D-Roc]

Cooling outlets on the Ada head should be on the carb side.


Sent

 

[Big Kahuna]

Sounds like it's on backwards

 

[Nuklear6]

If all the head bolts go in with out a bind its not on backwards. That's a 62t or 64x cylinder. It will need machining or grinding to clear the back and middle girdle stud on the exhaust side. Those cylinders had a larger exhaust mount due to the larger exhaust chamber they came with on the stock machines.

 

[kdog701]

I just bought a 2014 SJ that came with a girdled head but without the girdle studs installed. I ordered the stud kit and upon further inspection I noticed there are 2 holes that do not line up (closest to exhaust towards the rear). I tried to search about it and came up with nothing. Do you just drill down through the head holes to open them up?

Mine does same thing ...I'm going to drill and make it line up

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[Nuklear6]

Mine does same thing ...I'm going to drill and make it line up

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Watch driling that. With the off center existing hole the drill is likely to walk and oblong the girdle hole in the head. Beter to grind or machine that section of the casting off.

 

[NorrisMike]

So some line up and some don't??

 

[NorrisMike]

If all the head bolts go in with out a bind its not on backwards. That's a 62t or 64x cylinder. It will need machining or grinding to clear the back and middle girdle stud on the exhaust side. Those cylinders had a larger exhaust mount due to the larger exhaust chamber they came with on the stock machines.

I was told it's a 62T cylinder.

 

[jetx]

Here are pics so you know what needs clearanced to run the girdled head on the 62t cyl

 

[kdog701]

Here are pics so you know what needs clearanced to run the girdled head on the 62t cyl

What u use to cut it?

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[Nuklear6]

So some line up and some don't??

Its not a mater of lining up. You don't want to use that hole. You want the stud to pass freely through that area and thread into the case.

 

[jetx]

What u use to cut it?

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I personally didn't cut them so not sure...think a machine shop did it with there proper equipment, a buddy of mine originally did the cyl.

 

[NorrisMike]

Here are pics so you know what needs clearanced to run the girdled head on the 62t cyl

Most helpful!! Thanks for the pics.

I'm unfamiliar with the Ada heads. Being o-ringed, can you just pull the bolts out, remove it, grind away where necessary and install per ADA's original instructions? Or will the orings need replaced?

 

[jetx]

Yes you can pull head off and reinstall without having to replace orings if they are not damaged...cheap insurance though to replace them.

Most helpful!! Thanks for the pics.

I'm unfamiliar with the Ada heads. Being o-ringed, can you just pull the bolts out, remove it, grind away where necessary and install per ADA's original instructions? Or will the orings need replaced?

 

[NorrisMike]

Its not a mater of lining up. You don't want to use that hole. You want the stud to pass freely through that area and thread into the case.

Got it. Thank you.

 

[NorrisMike]

Yes you can pull head off and reinstall without having to replace orings if they are not damaged...cheap insurance though to replace them.

I also just noticed the plastic intake is blocking the center hole!!! Dang! Some modification required I guess.... I will pull it off to see if there is any "meat" in there to cut away without creating a hole.

I guess I should have asked before but, would y'all run the girdle kit? Stock internals, bpipe, 35cc domes, msd... I just assumed if the holes are there for it already then whey not! I will say I figured it would be a little more "plug n play" without mods. I guess it'll be cheap insurance.

 

[jetx]

IMO you don't need it unless you want to go through the hassle of modding it...the 62t casting is stronger than 61x and doesn't sound like your ported at all. Running it as is is just fine or swap it out for a non girdled head if you don't like the look of of the extra holes with no hardware.

Yes, the stock airbox will need modded for that stud

 

[NorrisMike]

IMO you don't need it unless you want to go through the hassle of nodding it...the 62t casting is stronger than 61x and doesn't sound like your ported at all. Running it as is is just fine or swap it out for a non girdled head if you don't like the look of of the extra holes with no hardware.

Yes, the stock airbox will need modded for that stud

Thanks for your insight. You seem like a great asset to this community. I just got the ski and from what I'm told, it is stock porting. I am also new to stand-ups so I am trying to learn everything as I go! Thanks again!

 

[jetx]

I have learnt most of everything I know from the boards over many years...there's a Wealth of knowledge buried in this forum, just have to ask or look for it! Don't be shy and welcome to the addiction!