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Message started by Eicas on 03/07/12 at 19:23:59

Title: Cylinder Head Nuts
Post by Eicas on 03/07/12 at 19:23:59

I'm putting in a new cylinder head cap seal on the "new" to me savage. I decided I might as well retourqe the cylinder head nuts while I was at it. I just took them off and am wishing I had just left them alone. They were nice and tight. Here's the question. All 4 studs wiggle in their hole a bit. They don't come out-just wiggle. Is this normal or did I just break all 4 studs?

Title: Re: Cylinder Head Nuts
Post by Eicas on 03/07/12 at 20:21:43

I didn't want to leave it undone over night so I torqued them back down and it seemed to work fine. Must be normal.

Title: Re: Cylinder Head Nuts
Post by verslagen1 on 03/07/12 at 22:46:44

Mine were all tight (88, 96, and 01)

How much thread do you have above the nut?

Title: Re: Cylinder Head Nuts
Post by Bubba on 03/08/12 at 07:22:56

Most bolts stretch. I always torque them...wait...torque them...wait torque them...

Title: Re: Cylinder Head Nuts
Post by Eicas on 03/08/12 at 08:11:55

Can't see how much thread above the nut with those cap nuts. I'm talking about when the nut is off- the threaded studs could all be wiggled back and forth a bit in their holes.

Title: Re: Cylinder Head Nuts
Post by justin_o_guy2 on 03/08/12 at 08:22:34

Thats a pretty long bolt, flex is to be expected,, did you screw them down into the engine cases?

Title: Re: Cylinder Head Nuts
Post by Eicas on 03/08/12 at 09:20:57

I didn't dissassemble that far. Just took the head cover off to do the cap seal and torque the head bolts. Bought the bike with an oil leak and I'm just covering all the bases. If those bolts are really long that would explain it. The dirt bike engines I've dug into before are very different.

Title: Re: Cylinder Head Nuts
Post by justin_o_guy2 on 03/08/12 at 10:05:08

If one stiucks up farther than another, it could be backing out of the case.

Title: Re: Cylinder Head Nuts
Post by Serowbot on 03/08/12 at 10:08:46

Double nut the stud and tighten it down, then remove the double nuts and torque the factory nut back on...

Am I telling him right here?...
That's what I'd do, if I understand the problem correctly... :-?...

Title: Re: Cylinder Head Nuts
Post by justin_o_guy2 on 03/08/12 at 10:10:14

1305120F17020F14600 wrote:

Yep, thats how Id do it.

Title: Re: Cylinder Head Nuts
Post by Eicas on 03/08/12 at 12:49:36

I think its fine- the studs weren't loose. I now realize they are very long bolts that come up through slightly over size holes in the head and when the nuts are off they can wiggle back and forth - like a tree trunk in the wind. Don't think I was describing my question very clearly. There isn't room on the exposed threads to fit 2 nuts or I would check the tightness of those studs. I think I'm moving in to the camp that says if there isn' t a problem don't mess with those things.

Title: Re: Cylinder Head Nuts
Post by justin_o_guy2 on 03/09/12 at 00:33:47

I think I'm moving in to the camp that says if there isn' t a problem don't mess with those things.

I cant tell you how much time & $$$ I spent before I made that move.