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 Changing Hoses on Blow-By?

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cytocycle
Tanabuso
Tanabuso


Posts : 85
Join date : 2013-07-02

PostSubject: Changing Hoses on Blow-By?   Sat May 10, 2014 12:46 pm

ok I've been a lurker for sometime and just introduced myself in my first 2 posts.

so I've been struggling with mechanics... dealer has caused more problems than fixed so now that I have time I need to start doing the fixing
Currently I've tracked down an oil leak to the left Blow-By house where it attaches to the head.  The rubber tubing is cracked at the top and is lightly spraying oil on everything, oh joy!
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I need to replace this hose (it's split slightly on the top) which runs up to a black plastic container near the head tube.  
Quick questions:
1) If I change out this house what type of hose should I buy?, and will that line be oil filled when I remove the clamp

2) Should I buy new clamps, safety wire, or get screw style clamps for the new hose?

3) on the right side Throttle body it looks like the connector is not latched? Can I latch this without the special tool?
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Thanks for any suggestions!
Chris
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Pete Roper
GRiSO
GRiSO


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

PostSubject: Re: Changing Hoses on Blow-By?   Sat May 10, 2014 4:08 pm

The hoses are unfortunately 'Pre Formed', mine cracked a few weeks ago and I bought new ones but I kludged mine up, (They were cracked at the bend.) and since they no longer leak I haven't got round to replacing them. The hoses are of the usual feeble Guzzi quality, in your case I'd be tempted to just remove the hose, (You'll need a pair of specific pliers for the Oeliker clamp.) and trim the end off the hose and re-install it and see what happens. If you can get a thin hose clamp that might offer a better solution than re-using the Oeliker clamp. The hose is a breather. It will have a small amount of oil in that has condensed from the vapour pumped out of the engine but they aren't *Full* of oil as their purple is to take the vapour to the condensor box behind the head where the oil separates and runs back to the sump via the other pipe that goes to the back of the sump next to the oil drain plug.

While not certain from the last picture that looks like one of the connectors to the charcoal canister. Many people pull this system off. If you do simply run the vent pipe down under the bike and join the two spigots on the manifolds together or simply plug them with short Allen bolts with an alloy washer on. The charcoal canister can simply be removed and stored in case you want to put it back on later for some reason.

Pete
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cytocycle
Tanabuso
Tanabuso


Posts : 85
Join date : 2013-07-02

PostSubject: Re: Changing Hoses on Blow-By?   Sat May 10, 2014 7:41 pm

Thanks Pete

the Charcoal Canister system fell off a while ago so I'll check to see if those are the same houses, I'm just annoyed that my GRiSO comes back leaking oil and stuff broken after dealer visits.

I am not sure I have enough house as the crack is like 1.75cm behind the clamp.. I was tempted to cut and safety wire it on if it's only an overflow basically. I might try that. That's annoying they are preformed as I looks impossible to get a set of those Oeliker pliers in near the head tube to replace the hose.

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Pete Roper
GRiSO
GRiSO


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

PostSubject: Re: Changing Hoses on Blow-By?   Sat May 10, 2014 8:07 pm

The hose has no real pressure in it. Unlike earlier big blocks all the venting of crankcase pressure is through these two hoses but it simply pumps the gas up to the separator where its errr, separated then the oil flows back to the sump and the gasses are fed to the airbox and re-breathed through the motor. The actual 'Pressure' is minimal, that's why the hoses aren't reinforced. I would of thought you could cut a couple of cm off the end and reattach it. It might look a bit ungainly but it would probably work.

Pete
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rboe
Tiradritto
Tiradritto


Posts : 306
Join date : 2014-04-21

PostSubject: Re: Changing Hoses on Blow-By?   Mon May 12, 2014 8:28 am

You can swing by the house sometime and test fit my Oetiker clamp pliers (and I have a good suplly of clamps so we could attempt the trim and reuse method Pete has suggested. It appears you have plenty of room up top to use the pliers. The other end, well, we'll just have to see. Looks tight.
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Steak
L'Innominato
L'Innominato


Posts : 1905
Join date : 2013-05-28
Age : 51

PostSubject: Re: Changing Hoses on Blow-By?   Mon May 12, 2014 8:48 am

cytocycle wrote:

3) on the right side Throttle body it looks like the connector is not latched? Can I latch this without the special tool?
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2012 MOTO GUZZI GRiSO 1200SE

2013 MOTO GUZZI STELVIO 1200NTX - Orange Blossom Special
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PostSubject: Re: Changing Hoses on Blow-By?   Today at 4:03 pm

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