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General Category => General Discussion => Topic started by: skimbrie on December 27, 2016, 06:11:51 PM

Title: 2014 Stelvio 1200 8v - What is this thing?
Post by: skimbrie on December 27, 2016, 06:11:51 PM
I was replacing the oil pressure sensor when I noticed this thing towards the front of the block under the alternator. It looks like brass and it is roughly spherical and apparently hollow. It has a large opening towards the back of  the engine and small hole on the  top. At first I thought it was some loose part that fell down into that spot but it is quite solidly fixed in place and very greasy.

The reason I am changing the sensor is it seems to be the source of a nasty oil leak. But this thing looks like it could be some sort of breather fitting or something and might have something to do with the leak.

Here's one close up picture and another from further back showing the location.

Any help is appreciated.

-Scott K.


(http://thumb.ibb.co/f0E10a/20161227_183210.jpg) (http://ibb.co/f0E10a)

(http://thumb.ibb.co/nMpC6F/20161227_183130_LI.jpg) (http://ibb.co/nMpC6F)
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Huzo on December 27, 2016, 06:46:11 PM
Do you have a workshop manual?
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Kiwi_Roy on December 27, 2016, 06:51:59 PM
Are you sure it hasn't corroded to the block?
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Chuck in Indiana on December 27, 2016, 07:11:29 PM
<scratching head> Looks like a pecan to me.. :smiley: :boozing:Maybe a hickory nut?
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: skimbrie on December 27, 2016, 07:40:40 PM
I have a shop manual and a parts catalog and I couldn't identify in any of the exploded views or photos.

I pried on it with a screw driver but it ain't moving - at least not with the force I was willing to apply.

When I first saw it, I too thought it was some kind of nut (as in tree, not as in "Guzzi Rider").
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: beetle on December 27, 2016, 08:07:53 PM
I declare it a foreign interloper. Sanction with extreme prejudice.
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Wayne Orwig on December 27, 2016, 08:34:07 PM
Christmas candy melted on the block.
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Green1 on December 27, 2016, 08:58:37 PM
Looks like a brass fitting or hex nut from an old sensor,little bit of brake cleaner to clean it off may make it easier to identify

Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Sasquatch Jim on December 27, 2016, 09:14:51 PM
 It's the head of a thonorken bolt.  Absolutely vital that you not change the adjustment.
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Huzo on December 27, 2016, 09:16:43 PM
It's the head of a thonorken bolt.  Absolutely vital that you not change the adjustment.
Sort of like the sacred screw.
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: leafman60 on December 27, 2016, 09:18:02 PM
Be careful.  The motor may fall out if you remove it! The Italians may have improvised and chucked that in there to hold something important.

Or, maybe its something else that has vibrated loose and fallen down there.  Some time in the future on a dark and lonely road, miles away from civilization, you may discover the purpose for which the object was intended before vibrating out.
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: Porterhouse on December 27, 2016, 10:52:37 PM
I could be wrong but I'm pretty sure that's the Fetzer valve.  You can have at it with some 3-in-1 oil and some gauze pads, but you're probably gonna need 'bout ten quarts of anti-freeze, preferably Prestone. No, no make that Quaker State.

That ought to do the trick.  :thumb:
Title: Re: 2014 Stelvio 1200 8v - What is this thing?
Post by: gearman on December 28, 2016, 03:30:49 PM
Grab it with a pair of pliers. Pull it out. looks like an interloper.