Question on soldering

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Keith.owen
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Question on soldering

Postby Keith.owen » Fri Nov 09, 2012 3:25 pm

Hi!
What is used to solder the copper pipe to the banjo unions in the oil feed?

Is lead/tin solder suitable?

Keith
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Re: Question on soldering

Postby john.nash » Fri Nov 09, 2012 4:47 pm

I used silver solder last time.
My reasoning was that it **might** get hot enough to compromise electrical type solder.
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Keith.owen
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Re: Question on soldering

Postby Keith.owen » Fri Nov 09, 2012 5:01 pm

Hi John,
probably a good idea. I wasn't going use electraicl solder but could have used plumbers solder which is a different alloy. But, best to be safe - silver solder it will be!!

Keith
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Postby keith.mettam » Fri Nov 09, 2012 6:50 pm

Used plumbers solder on mine and they've been fine. Make sure every thing is as clean as possible and well fluxed, don't overheat it or the solder will run out as fast as you feed it in. It helps to 'tin' the copper pipe first. Check pipes and banjos flow properly afterwards when cold, you don't want a blockage or restriction. Be careful when tightening the banjo nuts up, make sure the banjo's don't try and turn with the nut and fibre washer or you risk fracturing the joint.
All the best,
Keith.

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Re: Question on soldering

Postby brenton.roy » Sat Nov 10, 2012 1:26 am

If you can, it's a good idea to anneal the pipe afterwards. Less chance of a fracture while on the road.
I don't know if silver solder is a good idea. Ordinary solder is plenty strong enough and heat is not an issue. You lose the some of the capacity for an easy repair.
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Postby nevhunter » Sat Nov 10, 2012 3:09 am

A fully sweated 50/50 tinmans solder is good enough. Silver solder is very strong but has to be heated to a dull red. There are several grades but I have had a few efforts look more untidy than I like. If you want to soften (anneal) the copper pipe do it first and then clean it thoroughly. If you are not carefull the soft solder can block the holes so check they are clear. If you can't drill them you can use compressed air with the solder molten. Do this carefully as the stuff is very hot, and if it gets on you it will really burn.. Nev

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Postby dave.owen » Sat Nov 10, 2012 8:08 pm

I always use Plumbers solder, never had a problem

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Re: Question on soldering

Postby Wali.Badger.Taylor » Sat Nov 10, 2012 11:27 pm

If the oil gets hot enough to melt solder your engine only has nano seconds left anyway.

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Postby nevhunter » Sun Nov 11, 2012 7:03 am

Solder is Ok for oil pipes. I have seen solder used to fill in the deep tracks made by the gudgeon pin if the circlip comes out and sometimes it will melt out. Some cylinders get blue nearly half way down on Sidevalve engines in particular that are used hard. Nev

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Re: Question on soldering

Postby adrie.degraaff » Sun Nov 11, 2012 9:18 am

The problem is not the solder but the lengt of the pipe, make a good U.
If you bent out a 350 oilpipe to fit a 500 it will come undone in one time heating up.


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