Repairing a cracked Berg oil pump cover.

fullnoise Fahrvergnugen

964 posts · joined Sep 2002 · 26 Apr 2007, 9:34 am

#587416

My score for cracked full flow oil pump covers is now 2. I've got a habit of overtightening the fittings.

The berg pressure relief cover is my latest victim.

I was wondering if the crack, which goes from the end of the fitting thread and extends towards the centre of the pump for about 10mm, can be ground back and braised. Would this make it an oil-tight repair?

I did an oxy welding course at TAFE and we had to braise two pieces of cast iron together. That makes me think the Berg pump cover, which I think is cast, can be repaired in a similar manner.

Oh, and does anyone know where I can get an oxy bottle refilled on the sly?

Thanks.

[ Edited on 25-4-2007 by fullnoise ]

esratrams

koolkarmakombi enkarmarising

2,078 posts · joined Jun 2003 · 26 Apr 2007, 10:10 am

#587427

Yes you can braze it up however I would braze a fitting in place so you never have to tighten it again and recrack it. I have also used metal epoxy (jbweld) to fix a cracked case around the oil pressure sender. Bonded an extension fitting in place. Never leaked.

This disclaimer does not reflect the thoughts or opinions of either myself, my company, my friends, or my dog: don't quote me on that; don't quote me on anything; this disclaimer is subject to change without notice; text is slightly enlarged to show detail; resemblance to actual persons, living or dead, is unintentional and coincidental; dry clean only; do not bend, fold, or mutilate; anchovies or jalapenos added to this disclaimer upon request; your mileage may vary; no substitutions are allowed; for a limited time only while supplies last; offer void where prohibited; this disclaimer is provided "as is" without any warranties expressed or implied

fullnoise Fahrvergnugen

964 posts · joined Sep 2002 · 26 Apr 2007, 11:53 am

#587437

I think you're right. I should have a go at brazing it not braising it. While the former would help sealing the later would simply make it taste better.

Brazing the fitting in is a great idea too. Thanks.

Where can you get JB weld? It might be good for future reference.

esratrams

koolkarmakombi enkarmarising

2,078 posts · joined Jun 2003 · 26 Apr 2007, 12:11 pm

#587440

super cheap, bunnings etc.

If braising, onion and garlic help the infusion of oil :P

Loctite make a metal epoxy too. Make sur you clean all the bits uber clean so no residual oil gets in the way.

fullnoise wrote:I think you're right. I should have a go at brazing it not braising it. While the former would help sealing the later would simply make it taste better.

Brazing the fitting in is a great idea too. Thanks.

Where can you get JB weld? It might be good for future reference.

This disclaimer does not reflect the thoughts or opinions of either myself, my company, my friends, or my dog: don't quote me on that; don't quote me on anything; this disclaimer is subject to change without notice; text is slightly enlarged to show detail; resemblance to actual persons, living or dead, is unintentional and coincidental; dry clean only; do not bend, fold, or mutilate; anchovies or jalapenos added to this disclaimer upon request; your mileage may vary; no substitutions are allowed; for a limited time only while supplies last; offer void where prohibited; this disclaimer is provided "as is" without any warranties expressed or implied

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 26 Apr 2007, 12:27 pm

#587441

CT better off buying a new one

but if you do braze it up vee out the crack slightly so you have a better bond then you will have to surface face the cover as well and braze the fitting also good ldea

you may spend more time and money than the new cover is worth

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

silver Dangerous when poked

2,169 posts · joined Dec 2002 · 26 Apr 2007, 1:04 pm

#587445

I vee Grooved the crack on mine and mig welded it... fixed for good
use lots of the good thread tape and you should not have to tighten it to breaking point

Keeping it real !

Doug Sweetman Nil Bastardo Carborundum

2,128 posts · joined Sep 2002 · 26 Apr 2007, 3:53 pm

#587469

if you have a steam cleaner that is probably the best way to remove the last bit of residual oil after your typical solvent wash.....

onions and garlic... lol.... love the play on words.

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 26 Apr 2007, 7:40 pm

#587514

and check to make sure the heat does not distort the face of the plate.👍

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 27 Apr 2007, 5:41 am

#587584

Repair it CT,
but use a new one and keep the old as a spare.
If it lets you down somewhere it WILL disappoint.

Of interest is that most high pressure fittings use a "UN O-ring" system.
UNF thread with an O-ring to seal.
These can handle thousands of PSI and tighten up to a shoulder.
You might like to make or modify a new one to this.
Any hydraulics place can supply the fittings.
Why Bergs, and others, went to a taper is a mystery, but is probably smart marketing.

westi wrote:That's mad Alan.