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Shortened Pinto Sump Leak Cure ?
swood - 21/2/05 at 08:37 PM

I have finally cut & shut my sump, and extended the front out slightly to replace the lost oil capacity rather than weld a box on the side as per the Ro** Ho** web site method.
I had it MIG welded by our welder ( We don't do TIG which would have been preferable) who made a tidy job, and after grinding out a couple of minor leaks & re welding it appears water tight when filled and left overnight on newspaper.
However having read all the threads on sump leaks and the best cures I thought I would try to pre-empt any future problems before fitting it.
I contacted Wynn's to see what they would recommend (www.wynns.uk.com) a technical guy rang back and after some discussion he suggested going over the welded seams (after degreasing & Cleaning) with 'Hard as Steel ' an epoxy putty, before painting it.
I seem to remember this was recommended by some one else as a solution.
The shortened pick up is 8mm from the bottom of the sump, having checked with the bluetac method.
Next up is a modified plenum chamber !
I hope to put some photo's on, but am not that good with the bloody computers
PS why's the weather cold now Ive got the urge again !!

David Jenkins - 21/2/05 at 08:47 PM

With one of my sumps I got a friend with an oxy-acetylene set to run a braze fillet round the inside of the weld.

David

stevebubs - 21/2/05 at 09:22 PM

I brazed mine, too

BTW a top tip I was given recently was to test for leaks using parafin - apparently it will seep through smaller holes than water.

flak monkey - 21/2/05 at 09:48 PM

quote:
Originally posted by stevebubs
I brazed mine, too

BTW a top tip I was given recently was to test for leaks using parafin - apparently it will seep through smaller holes than water.


It will yes...so will petrol (expensive and smelly though). Its just because it has a lower surface tension than water, meaning it will go through a smaller hole.

Some of that epoxy putty is good stuff. Dont know about the price of that now though.

I would agree that brazing would be a good solution. (Seems logical to me anyway). Obviously (as you said) TIG welding first off would be the best way to go.

David

Mark Allanson - 21/2/05 at 10:00 PM

I migged mine and it didn't leak so no need to braze, but I agree that it is a good method. Epoxy putty ? is it oil resistant over a long period of time, and if it became unstuck, the damage would be catastrophic

David Jenkins - 22/2/05 at 08:22 AM

I MIG'd my second attempt, using the lessons I learned on the first attempt. I found it much easier to have a substantial metal plate as a base (1.6mm) making it easier to weld the very thin sump metal onto it without burning holes.

See website for details! (it's in there somewhere...)

David