Ada head leaking water into cylinder. =(

Quinc

Quinc

Buy a Superjet
Location
California
Switched from a Pro-tec (that never had an issue) to an ADA girdled head w/37cc domes I bought used from a vendor on here that was said to only have 10hrs on it.

I have tried new o-rings, I have tried torquing the bolts, riding, and re torquing.

I read an old thread that said to use 1211 around the dome? Would this help, and do I just put a bunch of 1211 on the back side of the dome and push it in? Do I have to worry about cooling after doing this?

Would it hurt/help to use gasket sealer on the o-rings around the domes?

Side note why the fudge does ADA use 9/16 girdle nuts? You would think they would have used metric to match the rest of the ski...
 
Dmac80sc

Dmac80sc

Site Supporter
Location
Here
Just making sure your gasket/oring areas are completely clean. Was the protec a gasket or oring head?
 
Jetfiend

Jetfiend

Location
PNW
You shouldn't have to use any sealant on an O-ring head, defeats the purpose. Are you using new O-rings? if so, check those surfaces, sounds like something is off.
 
Harbor

Harbor

Location
Stockton
I just reinstalled mine, seemed like the easiest thing that can happen is the o'rings pop out when lowering the head. I used grease in the groves to help hold them.
Are your o'rings staying put?
If you use a straight edge it's best to use a f e e l e r gauge to measure flatness. I gave an engine machinist co-worker heads and he comes back saying they are flat. I'am like really, how did you check them? With a flash light he says, WTF! I go measure with a f e e l e r gauge and we got .012 warpage.
 
Harbor

Harbor

Location
Stockton
Orangefinger what did you torque the head bolts too? 35 was on the girdle nuts?

I went 20 on the head bolts and 28 on girdle

Quinc how about you, how much torque did you use?
 
Quinc

Quinc

Buy a Superjet
Location
California
I am going off of ADA recommendations. I had to have all of my cylinder head bolts heli-coiled on another cylinder so I am paranoid about stripping them.
 
Quinc

Quinc

Buy a Superjet
Location
California
Harbor said:
I just reinstalled mine, seemed like the easiest thing that can happen is the o'rings pop out when lowering the head. I used grease in the groves to help hold them.
Are your o'rings staying put?
If you use a straight edge it's best to use a f e e l e r gauge to measure flatness. I gave an engine machinist co-worker heads and he comes back saying they are flat. I'am like really, how did you check them? With a flash light he says, WTF! I go measure with a f e e l e r gauge and we got .012 warpage.
Click to expand...

I use a little bit of grease to hold the o-rings in place. I have never had any issues with any other head but this one...
 
Harbor

Harbor

Location
Stockton
I don't know if this is any thing but the ADA head uses all .070 thick o'rings, I noticed protec has some .071 and .104
Do you have all 7 o'rings @ .070?

In another thread Jetmaniac list his ada head torque on his motors at 20 on head bolts and 28 on girdle nuts, if you got all 7 o'rings @.070 maybe try his torque spec. I used it on mine and I didn't feel like I was pulling the threads out, felt normal.......
 
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modularjunk

modularjunk

day dreaming
Site Supporter
Location
Long Island
Steve is a really good guy and all his parts are bought new and installed correct. he changes parts like underwear im sure that head is good. I was gunna grab it from him. Hes a local i ride with.
Check the deck on your cyls it may be off or warped. Are these the new cyls chuck CPT just worked on?
 
Quinc

Quinc

Buy a Superjet
Location
California
modularjunk said:
Steve is a really good guy and all his parts are bought new and installed correct. he changes parts like underwear im sure that head is good. I was gunna grab it from him. Hes a local i ride with.
Check the deck on your cyls it may be off or warped. Are these the new cyls chuck CPT just worked on?
Click to expand...


Correct, these are the ones CPT worked on. I have also tried it on two difference cylinders and it leaked on both, where as the Pro-tec heads where fine. I am going to check today with the f e e l e r gauges. Worse case if I do use gasket sealer would that cause any issues other then not being ideal?

Edit: Not sure why it ****** the word Fe eler?
 
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masterblaster

masterblaster

X-H2
It could have been a newer head with older reused domes im guessing,if youve tried on 2 cylinders with same result ...ada oring heads have a very minimal crush clearance,once the dome has worn into the head and you can feel any level changes in where the dome meets the head on either surface,its really done but you can try swiveling the dome so the contact points change,also put a thin layer of 1211 on the contact areas of the dome and the head,let it dry for a day,then put them back in...once the crush clearance is off by a few hundredths the oring has no ability to stop the hot exh from blowing right through them,no matter what sealer you use on them or what torque you apply to head
 
Harbor

Harbor

Location
Stockton
masterblaster said:
It could have been a newer head with older reused domes im guessing,if youve tried on 2 cylinders with same result ...ada oring heads have a very minimal crush clearance,once the dome has worn into the head and you can feel any level changes in where the dome meets the head on either surface,its really done but you can try swiveling the dome so the contact points change,also put a thin layer of 1211 on the contact areas of the dome and the head,let it dry for a day,then put them back in...once the crush clearance is off by a few hundredths the oring has no ability to stop the hot exh from blowing right through them,no matter what sealer you use on them or what torque you apply to head
Click to expand...

These Are good points because mine did not leak to begin with
 
TheBuzzard

TheBuzzard

Location
the jetski grave yard
i've got a bunch of these heads and the worn out ones just blow Orings hella quick or the dome spins when i try and take the plugs out. i have used some of them anyway and just have to replace Orings very often. i've never had one let water back into the cyl. are the Orings cherry or lemons when you take it apart?
 
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