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New Boiler/heating element How do I clean the old lower half?
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mojoneill
Senior Member


Joined: 11 Aug 2012
Posts: 22
Location: Iowa
Expertise: Just starting

Espresso: Silvia
Grinder: Rocky
Posted Sun Aug 19, 2012, 11:06am
Subject: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

So I have a new boiler heating element, and I'm working through one remaining stubborn screw (described and pictured here) poking through the old lower half of the assembly (I believe this is called the "group head").

So, how do I get that clean?  How clean does it have to be?

I'd imagine the mating surfaces should look as close to "buffed" as possible, but I have no idea how to achieve that.  I have all sorts of staining and scale.

I'm trying to scrub with citric acid, but I don't think a nylon brush is going to scour things like I need to. I'm afraid of using a brass brush cause I don't want to mark the surface.  

Advice?
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mojoneill
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Joined: 11 Aug 2012
Posts: 22
Location: Iowa
Expertise: Just starting

Espresso: Silvia
Grinder: Rocky
Posted Mon Aug 20, 2012, 2:41pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

Well, after 20 hours of filling the bottom half of the boiler with citric acid (dezcal), soaking, and scrubbing with scotch-brite pads, I was able to get things pretty clean.  Before and after photos below.

mojoneill: IMG_2233_small.jpg
(Click for larger image)
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mojoneill
Senior Member


Joined: 11 Aug 2012
Posts: 22
Location: Iowa
Expertise: Just starting

Espresso: Silvia
Grinder: Rocky
Posted Mon Aug 20, 2012, 2:41pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

And here's the AFTER shot...

mojoneill: IMG_2235_small.jpg
(Click for larger image)
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earlds
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earlds
Joined: 16 Nov 2003
Posts: 492
Location: Mobile
Posted Mon Aug 20, 2012, 9:32pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

Nice ! I guess after 8 years it must be getting time to break down my boiler and do some serious cleaning.
Don
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
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Location: Riverside, Ca, U.S.A.
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Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Aug 21, 2012, 10:08am
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

Wow, when I did mine, I think it took about 20 minutes all up. Descal and  a scotch bright pad, same as you. I bet yours sparkles!

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

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mojoneill
Senior Member


Joined: 11 Aug 2012
Posts: 22
Location: Iowa
Expertise: Just starting

Espresso: Silvia
Grinder: Rocky
Posted Tue Aug 21, 2012, 4:47pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

@calblacksmith: 20 Minutes???  Holy smokes!  

Did you take the whole group-head assembly out and submerge it?
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,734
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Wed Aug 22, 2012, 6:14am
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

Yes, I took the whole machine apart for a complete rebuild.
http://coffeegeek.com/forums/espresso/machinemods/547829

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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dingdong
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Joined: 25 Jul 2012
Posts: 9
Location: Washington
Expertise: Professional

Posted Wed Aug 22, 2012, 4:25pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

The Silvia group head is the lower portion; it's all one solid piece of brass. The only way to really thoroughly clean it is to remove it and soak it in Dezcal or the like. The soft rubber replacement parts will (of course) need to be replaced, as well as the screen, but I'm sure you're already on top of that. Group/portafilter gasket, solenoid flange o-rings and the boiler o-ring - that's it.

dingdong: SilvaGroup.jpg
(Click for larger image)
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CraigA
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CraigA
Joined: 19 Dec 2001
Posts: 11,241
Location: Rexdale, Toronto, Ontario, Canada.
Expertise: I live coffee

Espresso: PID/PressureMod 2001...
Grinder: BUNN FPG-2 DBC, Baratza...
Vac Pot: Bodum Santos manual, Yama 5...
Drip: Behmor BraZen, BUNN VPR-APS,...
Roaster: Refurb Behmor 1600, BBQ...
Posted Wed Aug 22, 2012, 4:47pm
Subject: Re: [Silvia] New Boiler/heating element How do I clean the old lower half?
 

dingdong Said:

The Silvia group head is the lower portion; it's all one solid piece of brass. The only way to really thoroughly clean it is to remove it and soak it in Dezcal or the like. The soft rubber replacement parts will (of course) need to be replaced, as well as the screen, but I'm sure you're already on top of that. Group/portafilter gasket, solenoid flange o-rings and the boiler o-ring - that's it.

Posted August 22, 2012 link

Hi Devon,

Actually the lower portion of that one piece the way you have it sitting/displayed is on the right, & is the portion that the boiler attaches to of course. The grouphead is higher & on the left (the way you have it displayed). {;-)

 
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