ADVrider

Go Back   ADVrider > Bikes > Old's Cool > Airheads
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-12-2011, 08:21 PM   #1
NevadaTex OP
Adventurer
 
NevadaTex's Avatar
 
Joined: Mar 2004
Oddometer: 78
Airhead Valve Cover problems

You know that center stud that helps hold the valve cover on...yep...I stripped it! and not the stud part either. It's the threads in the cylinder head that are shot. The stud is just fine. And the chrome nut is fine, too. The whole assembly can be tightened very modestly before it spins.

Does that make sense? I hope so.

It's not leaking oil, but it hasn't been run too much since I discovered the damage. The two bolts (fore and aft) are in good shape. Are they sufficient to keep the whole package oil tight? Or should I take care of the center attachment like a good cowboy?

What to do? Ignore it? Teflon tape? Retap to bigger size? Helicoil? Other?

thanks for any help/insight you can provide.
__________________
NevadaTex

1985 BMW R80
2005 F650 Dakar
NevadaTex is offline   Reply With Quote
Old 07-12-2011, 08:26 PM   #2
jackd
Beastly Adventurer
 
Joined: Dec 2006
Location: North Cowichan
Oddometer: 2,952
Do a proper repair. I would put in a helicoil and then forget about it. You don't want to have to worry about something coming apart as you're riding.
jackd is offline   Reply With Quote
Old 07-12-2011, 08:29 PM   #3
lemieuxmc
Banned
 
lemieuxmc's Avatar
 
Joined: Mar 2009
Location: East La Jolla... it's just Clairemont!!
Oddometer: 3,360
You can do a half fast repair; clean out the stud hole with carb cleaner, coat the stud threads with JB weld, screw it in, forget about it.
lemieuxmc is offline   Reply With Quote
Old 07-12-2011, 08:32 PM   #4
hardwaregrrl
You talkin' to me?
 
hardwaregrrl's Avatar
 
Joined: Jan 2006
Location: Atlanta
Oddometer: 6,946
Center nut needs to be snugged and not overtightened. But, you already know that.! But with that being said, the 2 6mm studs do hold that valve cover on pretty well. But as Jack'd said, properly repair the center stud hole. If it's your only vehicle, just run your hand around the valve cover and check for oil after every ride and fix it when you get a chance. It would also help to get a soft silicone valve cover gasket.
hardwaregrrl is offline   Reply With Quote
Old 07-12-2011, 08:36 PM   #5
boxerboy81
Stay Horizontal
 
boxerboy81's Avatar
 
Joined: Jul 2009
Location: Melbourne, Oz
Oddometer: 2,192
I think it'll hold ok without a repair. That means fix it when other stuff needs fixin'. It doesn't need to be a priority.



..
boxerboy81 is offline   Reply With Quote
Old 07-12-2011, 09:05 PM   #6
NevadaTex OP
Adventurer
 
NevadaTex's Avatar
 
Joined: Mar 2004
Oddometer: 78
thanks

Ya know....I'm betting that somewhere in its history, someone else in one of the many shops this thing has been in stripped it out and then used the JB Weld fix. Yeah, yeah...that's it. Someone else mangled it and I just recently found it.

Any of you fine folks know of a particularly good you toob video on how to install a helicoil? I'd hate to kludge it up and then have to buy a whole new head, but that's not an unheard of trajectory. Especially when you put a wrench in the hands of a spreadsheet artist.

Thanks for your help. I kinda knew what I should do, but needed a gentle push in the right direction. I won't decommission the bike because of this boo boo, but the helicoil will go on the increasingly long list of things the beast needs.
__________________
NevadaTex

1985 BMW R80
2005 F650 Dakar
NevadaTex is offline   Reply With Quote
Old 07-12-2011, 09:23 PM   #7
wirewrkr
the thread-killer
 
wirewrkr's Avatar
 
Joined: May 2008
Location: HIGH desert
Oddometer: 4,297
try taking an 8mm nut and grinding it down to fit in this crevice below the stud. you'll need a longer stud of course, but it will never ever
give a problem again

Either that or get a hold of a timesert kit.
Helicoils are dinosaur technology.
this happens all the time. . use blue lock tight in the ground down end nut only.
Attached Images
 
__________________

www.wirewerkes.com
KILL YOUR TELEVISION !!!!

wirewrkr screwed with this post 07-12-2011 at 10:31 PM
wirewrkr is offline   Reply With Quote
Old 07-12-2011, 09:50 PM   #8
Stagehand
+/- V TDSPP
 
Stagehand's Avatar
 
Joined: Oct 2004
Location: Shawangunks
Oddometer: 25,176
that there's not a bad idea at all!
__________________
Unintentional psychokinesis.
Stagehand is offline   Reply With Quote
Old 07-12-2011, 09:54 PM   #9
jackd
Beastly Adventurer
 
Joined: Dec 2006
Location: North Cowichan
Oddometer: 2,952
We Still Use Them.

We only use Helicoils on repairs to aircraft engines at my company in the rare event that the Helicoils installed from the factory decide to pull. So they are still out there. Timeserts are probably the latest and greatest - no discussion there. I'm sure you could handle the repair yourself or bring it to a shop to have it done quite cheaply.
jackd is offline   Reply With Quote
Old 07-12-2011, 10:29 PM   #10
wirewrkr
the thread-killer
 
wirewrkr's Avatar
 
Joined: May 2008
Location: HIGH desert
Oddometer: 4,297
Quote:
Originally Posted by Stagehand View Post
that there's not a bad idea at all!
Been doing this for years. Till I get around to putting in a time sert.
Like I said you'll never pull a stud again.
Hey maybe I should make a repair kit just like my centerstand repair kit!
Hmmmm......................
__________________

www.wirewerkes.com
KILL YOUR TELEVISION !!!!
wirewrkr is offline   Reply With Quote
Old 07-12-2011, 10:35 PM   #11
wirewrkr
the thread-killer
 
wirewrkr's Avatar
 
Joined: May 2008
Location: HIGH desert
Oddometer: 4,297
Quote:
Originally Posted by jackd View Post
We only use Helicoils on repairs to aircraft engines at my company in the rare event that the Helicoils installed from the factory decide to pull. So they are still out there. Timeserts are probably the latest and greatest - no discussion there. I'm sure you could handle the repair yourself or bring it to a shop to have it done quite cheaply.
Timeserts are not so new, I was introduced to them as an apprentice VW/Porsche/Audi mechanic in 1979.
They weren't a new idea then, but Helicoil was definitely old, and that was over 30 years ago.
__________________

www.wirewerkes.com
KILL YOUR TELEVISION !!!!
wirewrkr is offline   Reply With Quote
Old 07-13-2011, 12:32 AM   #12
boxerboy81
Stay Horizontal
 
boxerboy81's Avatar
 
Joined: Jul 2009
Location: Melbourne, Oz
Oddometer: 2,192
Quote:
Originally Posted by wirewrkr View Post
try taking an 8mm nut and grinding it down to fit in this crevice below the stud. you'll need a longer stud of course, but it will never ever
give a problem again

....
Works fine that method. I used that once many moons ago on a previous bike and it worked beautifully.
boxerboy81 is offline   Reply With Quote
Old 07-13-2011, 05:39 AM   #13
hardwaregrrl
You talkin' to me?
 
hardwaregrrl's Avatar
 
Joined: Jan 2006
Location: Atlanta
Oddometer: 6,946
Quote:
Originally Posted by wirewrkr View Post
Been doing this for years. Till I get around to putting in a time sert.
Like I said you'll never pull a stud again.
Hey maybe I should make a repair kit just like my centerstand repair kit!
Hmmmm......................
Yes! You should make and sell the studs for repair!!
hardwaregrrl is offline   Reply With Quote
Old 07-13-2011, 05:59 AM   #14
Beater
Theory Is Not Enough
 
Beater's Avatar
 
Joined: Sep 2009
Location: Atlanta, GA, USA
Oddometer: 3,008
Quote:
Originally Posted by wirewrkr View Post
try taking an 8mm nut and grinding it down to fit in this crevice below the stud. you'll need a longer stud of course, but it will never ever
give a problem again
Either that or get a hold of a timesert kit.
Helicoils are dinosaur technology.
this happens all the time. . use blue lock tight in the ground down end nut only.

Now that's pure genius. I didn't think of that ...

PS - My left side stud is stripped just like yours. But I bought the rubber valve cover gasket and it doesn't leak with just the two little bolts holding it on. But I'm going to try wirewrkr's fix next time the head is off.
__________________
Fred
'85 R80RT G/Sified <|> '91 R100GS Bumblebee (103K miles and climbing) <|> '73 R75/5 LWB
Airhead Zen: Ride - Repair - Ride - Maintain - Ride - Repeat
Beater is offline   Reply With Quote
Old 07-13-2011, 07:17 AM   #15
NevadaTex OP
Adventurer
 
NevadaTex's Avatar
 
Joined: Mar 2004
Oddometer: 78
Quote:
Originally Posted by hardwaregrrl View Post
If it's your only vehicle, ...
Fortunately, it's just a stupid obsession and not my only vehicle. Otherwise I'd be doing a lot of walkin'.

I bought this beast brand new in 1986 and can't seem to let it go.
__________________
NevadaTex

1985 BMW R80
2005 F650 Dakar
NevadaTex is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:37 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014