sxr cylinder keeps loosening up

[tom21]

hey my friend has twice now had the six bolts back out on the cylinders. I know he put a ton of red loctite on it. it has done it since changing from the stock head to the ADA. due to the tight confines of the new girdled bolts I think he just went to what he felt was tight and not used a torque wrench. Is there more torque required due to more compression or do I just need to watch over and make sure he uses the torque wrench?

 

[extreemthrottle]

i know they require additional tork as they are a larger bolt. guessing in the 80ft lb range, he should'nt have to loctite those, i've never had them come loose on me before. but anyway, make sure the threads are clean and dry before appling it, if they have any oil on them it won't work properly..

 

[Project Ski]

80lb seems way overkill but i may be wrong. I think the stock bolts go on with 18-22 lbs Check with ADA for the right specs. You dont want to strip the threads in your engine.

 

[tom21]

This time for sure I will make sure he at least gets the stock torque- but I think he still has the instructions so we will check it. but I just thought maybe someone else had this happen.

 

[WaveDemon]

blue loctite handles high temps better than red loctite. I'd try blue with a torque wrench.

 

[extreemthrottle]

80lb seems way overkill but i may be wrong. I think the stock bolts go on with 18-22 lbs Check with ADA for the right specs. You dont want to strip the threads in your engine.

are we talking about cylinder base bolts or head bolts?
base bolts 60 to 80 (a estimate) head bolts 18-22

 

[tom21]

yes the cylinder base bolts, the studs are longer and have the special nuts that the head girdle studs go into. all six are coming loose and he has to change the base gasket again. the prob is you can't really get a socket and extension on to get the torque wrench on it. I have a crowsfoot- but I just think it will loose some of the torque reading.

WD I thought the red was a tighter bond like for something you don't want to come loose. blue is for things that will be off more regular like?

 

[WaveDemon]

WD I thought the red was a tighter bond like for something you don't want to come loose. blue is for things that will be off more regular like?

right, but the red melts under heat. don't use red on stuff that gets hot. :biggthumpup:

 

[tom21]

looked on the site and it says 22 on the cyls- and to recheck after first ride an d periodically there after oops:bigeyes: :bigeyes: :bigeyes: :bigeyes:

 

[WaveDemon]

umm, you might have a bolt fatigue problem now too.


Often fatigue failure is a result of the bolt self-loosening which reduces the clamp force acting on the joint. Joint slip then occurs which leads the the bolt being subjected to bending loads and subsequently failing by fatigue.

http://www.boltscience.com/pages/vibloose.htm

 

[tom21]

yeah right! And so how many of your bolts and studs are not originals?oke:

 

[WaveDemon]

yeah right! And so how many of your bolts and studs are not originals?oke:

I find bolt in my hull after every ride though. that's the main reason I don't run a scupper, I don't want my spairs on the bottom of the ocean. :cool2:

 

[tom21]

I have been to A.R.P. site many times and full understand the wear and stress that the hardware takes on lots of engines and still I have rarely changed the hardware. cheap? yes. so far I haven't last any motors. so we will keep trying our luck.:cheer: thanks for the "heads" up. get it ? he he he.

 

[ANT]

Did he tighten the long studs that go from the cylinder base to the head? You have tighten them with a stud tool or double nut it to tighten it you can't just srew the stud into the base then put the nut on and tighten it because that will throw the torque setting way off and the studs will come loose.

 

[SUPERTUNE]

If its a ada head with the long 10mm studs,(like the ada for the yamaha head) yes they should be torqued to at least 40 lbs!

 

[tom21]

thanks Chuckie! , I figured it needed more because it is thru the head but the instructions say 22.

 

[SUPERTUNE]

And 22 is about right on the 8mm studs...

 

[hangtime]

I'm pretty sure my ADA head for my SJ said 23 lbs on the girdle studs but Chuckies probably right

 

[extreemthrottle]

sorry:sad6: :tomato: i did'nt read the post properly..

 

[Ollie Rastabean]

Any chance he is detonating. .

Deto can cause strange things to happen to bolts.....like undo!

-O