12425 - Established June, 2013 - all GRiSO, all the time...
 
HomeFAQRegisterLog in

Share | 
 

 Disaster - Advice Required

View previous topic View next topic Go down 
AuthorMessage
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Disaster - Advice Required   Fri Oct 02, 2015 7:29 pm

Good Afternoon All,

My relaxing day doing a bit of GRiSO maintenance and then perhaps a ride later has ended in disaster. Was getting ready to check valve clearances and went to remove the spark plug from the left hand cylinder and thought that it was a bit tight. Instead of being sensible I pushed a bit harder and heard the dreaded crack. Yep, the plug snapped just above the thread. I'm in dire straights now. The GRiSO is my daily ride and there is no one I trust anywhere nearby to assist. Thinking about getting into it myself but not to sure. Any advice?

Matt
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 7:47 pm

The hex head snapped off as well? Ferk! Is a all the threaded end still in the head? Any part of it sitting proud of the threaded part of the head?

Firstly, use penetrating oil to lubricate the leftover thread.  I don't recommend drilling it for an ezy-out, as you may end fucking the head.

After a good soak, you may be able to use a screwdriver to remove the remains.
Back to top Go down
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 7:52 pm

Yep, hex head snapped off. All the threaded section still end is still in the head. Head removal required I take it?
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 8:03 pm

Not necessarily. A good soak and some carefully applied torque from a screwdriver or similar might free it. If not already off, pull the valve cover and tube. Tube is held in by o-rings. Can you take a pic?
Back to top Go down
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 8:06 pm

Valve cover is already off. Just walked away from it in disgust. No internet where the bike is so photo upload is problematic. More advice on removal of tube?
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 8:10 pm

The tube should pull straight out with a wriggle.
Back to top Go down
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 8:12 pm

OK. appreciate the advice Beetle. Will jump back on line after I give it a go and let you know how I got on.

Matt
Back to top Go down
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 8:51 pm

Success! Thanks for the advice Beetle.
Back to top Go down
waterbottle
GRiSO
GRiSO


Posts : 1039
Join date : 2015-02-02
Age : 55

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 9:01 pm

MattF, Use some type of Anti- Seize compound on the threads of the spark plugs when installing. You don't need a lot, but a little with the proper torque applied the the spark plug (? ) will prevent this recuring. Some knob jockey may have over torqued it too. Spark plugs only have to seal the hot gases produced in the cylinder, they don't hold the wheels on ????? how tight was it ?
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Disaster - Advice Required   Fri Oct 02, 2015 9:34 pm

Good job Matt.

+1 what Ron says. A firm nip is all they need. Always put a wee smear of anti-sieze compound on the threads.
Back to top Go down
Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 1:15 am

Win! Normally busted plugs are a head off job.

Pete
Back to top Go down
MattF
Montanarolo
Montanarolo


Posts : 14
Join date : 2015-07-16
Age : 48

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 1:28 am

Thanks for the advice. Plug was bloody tight and the thread very dry. I've heeded your advice and all is good now. Off for a ride tomorrow I think.

Matt
Back to top Go down
Ralf z
Tiradritto
Tiradritto


Posts : 315
Join date : 2014-01-02
Age : 49

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 2:48 am

Good recovery Matt.
And here I was upset because I cracked a spark plug porcelain on my f100.
Back to top Go down
Bill Hagan
Sfregiato
Sfregiato


Posts : 468
Join date : 2014-07-03

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 4:58 am

Congrats. cheers

I scrolled down in fear of a worse bottom line.  

Bet a recording of your ... erm ... "exclamations" would be colorful.  Wink

Bill

Back to top Go down
klaas123
Grignapoco
Grignapoco


Posts : 104
Join date : 2015-09-30
Age : 56

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 8:58 am

Spark plug torque is 30Nm or 22lbf ft
Back to top Go down
Guzzi Cat
Grignapoco
Grignapoco


Posts : 178
Join date : 2014-09-02

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 11:26 am

Good outcome MattF, I dont trust torque settings for delicate stuff like spark plugs! I'd rather just nip it up and trust the torque settings on my wrist instead. I have seen some specs for plugs that just seem overcooked!!
Back to top Go down
klaas123
Grignapoco
Grignapoco


Posts : 104
Join date : 2015-09-30
Age : 56

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 11:32 am

The torque settings on most wrists is far to high for spark plugs, that's why these things happen...
Back to top Go down
Guzzi Cat
Grignapoco
Grignapoco


Posts : 178
Join date : 2014-09-02

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 12:51 pm

klaas123 wrote:
The torque settings on most wrists is far to high for spark plugs, that's why these things happen...

True Klass, but I have tender little wrists Very Happy
Back to top Go down
klaas123
Grignapoco
Grignapoco


Posts : 104
Join date : 2015-09-30
Age : 56

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 12:53 pm

Sorry Guzzi Cat now I see, missed your avatar haha
Back to top Go down
pokeyjoe
Don Abbondio
Don Abbondio


Posts : 121
Join date : 2014-08-22

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 1:28 pm

waterbottle wrote:
MattF, Use some type of Anti- Seize compound on the threads of the spark plugs when installing. You don't need a lot,  but a little with the proper torque applied the the spark plug (? ) will prevent this recuring. Some knob jockey may have over torqued it too. Spark plugs only have to seal the hot gases produced in the cylinder, they don't hold the wheels on ????? how tight was it ?

While I agree, NGK put up a paper some time back on the use of anti-seize on spark plugs.  According to them, if the threads are silver, anti-seize has already been applied and you need apply no more.  If they are black, there is none and you need to apply it.  

I'm in the "it can't hurt" category on this one.

Linky
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 3:20 pm

Always use anti-seize. Always.

30Nm? Fuck that. It's too much. A gentle nip is all they need.
Back to top Go down
Grisonut
GRiSO
GRiSO


Posts : 1015
Join date : 2014-01-02

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 4:24 pm

Agreed with Beetle...30Nm is bad news.
You Cro magnons need to chill with torque set ups. LOL
Back to top Go down
klaas123
Grignapoco
Grignapoco


Posts : 104
Join date : 2015-09-30
Age : 56

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 6:42 pm

[You must be registered and logged in to see this link.]
Back to top Go down
wardentm
Nibbio
Nibbio


Posts : 516
Join date : 2015-05-16
Age : 64

PostSubject: Re: Disaster - Advice Required   Sat Oct 03, 2015 7:38 pm

G'day all
I have learned over the years that torque levels and torque wrenches are more a problem than a help.
They are only accurate when the associated parts are in first class condition which is generally not too often - when new for example.
Some engineering concerns such as 'Deutz' do not give torque values but rather 'degrees' of movement after initial contact, I find this makes much more sence. An example of this is as we do with oil filters, screw on by hand until initial contact then a quarter (90 degees).
When I was young I was given bolts and told to put them in a vice and screw nuts onto them and tighten to destruction and 'feel' what happens in this process, a great exercise for any budding wrencher.
So, I generally do not use them only on critical situations such as head bolts and only if the elements are next to perfect.
Caoi
Back to top Go down
Sponsored content




PostSubject: Re: Disaster - Advice Required   Today at 4:03 pm

Back to top Go down
 
Disaster - Advice Required
View previous topic View next topic Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
GRiSO ghetto :: The Ghetto :: GRiSOLOGY-
Jump to: