[Public-List] Manifold petcock Atomic 4

[Don Campbell]

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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> Please support them.
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