[Public-List] Manifold petcock Atomic 4

Ronald Walker rwpsw at sbcglobal.net
Sun May 20 04:54:21 PDT 2012


Thanks John
A tap with less taper just might do the trick. Going to have to go over size and buy one of those petcocks like you find in the bottom of radiators. Should work, if I can find the tap. I wonder if Lowes carries taps. Probably have to wait till Monday.

--- On Sat, 5/19/12, John Boor <mahseer at kos.net> wrote:

> From: John Boor <mahseer at kos.net>
> Subject: Re: [Public-List] Manifold petcock Atomic 4
> To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
> Date: Saturday, May 19, 2012, 3:02 PM
> Since it is a drain port you don't
> need a bottoming tap.
> 
> John Boor
> 
> > If you can find a bottoming tap of the correct size, it
> has far less
> > taper than the normal tapered tap. You might want to
> compare it with a
> > plug tap to see which might suit you best. I imagine
> you will have to go
> > to an industrial supplier who carries an open line of
> tools to find them.
> > Don #528
> >
> > On 5/19/2012 8:27 AM, Ronald Walker wrote:
> >> The engine is the old Atomic-4.Its my understanding
> that all Albergs
> >> were originally powered by them.I believe the
> petcock is brass and the
> >> manifold is some type of steel. As I said the
> threads are there, just
> >> flattened out. I'm going to try some J.B.Weld.
> Don't know what else to
> >> do.
> >>
> >> --- On Sat, 5/19/12, Glennb<brooks.glenn at comcast.net> wrote:
> >>
> >>> From: Glennb<brooks.glenn at comcast.net>
> >>> Subject: Re: [Public-List] Manifold petcock
> Atomic 4
> >>> To: "Alberg 30 Public List -- open to
> >>> all"<public-list at lists.alberg30.org>
> >>> Date: Saturday, May 19, 2012, 1:18 AM
> >>> What kind of engine/manifold do you
> >>> have, and what material is the petcock made
> of?  sounds
> >>> like the petcock corroded off, leaving part of
> the threaded
> >>> portion in the manifold.
> >>>
> >>> If so, try going in with a very small drill
> bit, maybe
> >>> slightly larger than the ID of the hole, then
> run a series
> >>> of increasingly larger taps to ream out the old
> material to
> >>> match the original ID and thread.
> >>>
> >>> just did this on my steam engine, took about an
> hour to
> >>> replace the broken nipple. But it was brass and
> the boiler
> >>> is steel.
> >>>
> >>> Glenn p
> >>> dolce 318
> >>>
> >>>
> >>> Sent from my iPad
> >>>
> >>> On May 18, 2012, at 12:47 PM, Ronald
> Walker<rwpsw at sbcglobal.net>
> >>> wrote:
> >>>
> >>>> Maybe someone can help me with a small
> problem I
> >>> discovered during the spring start-up
> procedure.On the aft
> >>> part of the manifold there is a petcock. Its is
> for draining
> >>> the manifold water jacket. As I began to close
> the petcock I
> >>> noticed it was loose. I tried to tighten it but
> it ended up
> >>> falling off in my hand. After a good close look
> I saw that
> >>> the threads were all buggered up.On the petcock
> as well as
> >>> the hole. I thought about running a tap in to
> maybe sweeten
> >>> up the threads but the recess is way to
> shallow. Any advise
> >>> would be appreciated.
> >>>>
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> 
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