novicebuilder
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| posted on 8/6/13 at 05:50 PM |
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Leaking Sump aaaaaargghhhh! Any tips
I have cut down and welded up my modified sump for my Haynes roadster and there were few leaks when filled with water. Most I have solved but there a
few that I cannot stop. I expect the actual leak is some way from where the water appears. It is driving me mad. I had a nice set of delicate welds
but with additional welds to stop leaks, it now looks very ugly..... and it is still leaking.
Any advice from those who have done this themselves? Are there any good tips?
All constructive help appreciated.
thanks
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big_wasa
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| posted on 8/6/13 at 06:02 PM |
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Tig welding is the way forward here. You can get a good weld pool around the pin hole and add minimal filler.
But a photo up. How bad is it ?
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gremlin1234
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| posted on 8/6/13 at 07:06 PM |
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quote:
Originally posted by novicebuilder
few leaks when filled with water. ..
I expect the actual leak is some way from where the water appears...
you could try putting the sump in a bowl of water and seeing where it appears on the inside
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jacko
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| posted on 8/6/13 at 07:39 PM |
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I always gas weld sumps then mig them inside to find leaks i use thinners
This is on steel sumps And i always screw them to my flat bench to stop it warping
Jacko
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loggyboy
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| posted on 8/6/13 at 08:37 PM |
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If its hairline/ pinprick holes then paint or powdercoat it.
Mistral Motorsport
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britishtrident
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| posted on 8/6/13 at 09:05 PM |
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Gas Bronze welding (often incorrectly called Brazing which is actually a different process ) is my method of choice when modifying sumps.
However if you clean off any oil residue You should be able to seal the leak with suitable steel-epoxy repair compound (for example JB Weld) or a
shellac based sealer.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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mark chandler
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| posted on 8/6/13 at 09:33 PM |
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Assuming you have mig welded it's caused by cold start, when you first strike an arc the wire drops on to cold metal resulting in pin holes.
You need to weld the sump in a continuous fashion, no stopping and starting do it in one go then where you finish go over the initial weld an inch or
so then come back upon yourself and stop.
Also weave in a figure of 8 to keep the heat in the material.
Alternatively butt a piece of scrap metal against you work, start the weld bead on this then advance, again one continouos weld then finish where you
started and cut off.
Regards Mark
[Edited on 9/6/13 by mark chandler]
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Blackhole
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| posted on 8/6/13 at 10:35 PM |
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Or preheat it with a blow torch?
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neilp1
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| posted on 9/6/13 at 11:53 AM |
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Grind back the stop/starts an inch or so before re-starting where you have ground back.
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Litemoth
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| posted on 9/6/13 at 12:38 PM |
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What he said ^^
Grind it back and weld it again. Tarting it up with sealant will just save up trouble and leave oil patches.
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