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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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 Posted: Wed May 23, 2018 7:10 am Post subject: Hairline crack in case |
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On my way to a convention 80 miles from home, my oil light comes on about half way there. I see oil leaking, but thought rear main seal. Go to the convention, it's leaking bad by now. Add oil and drive the 80 miles back home after it's over.
Suprise it's a CRACKED CASE! 😣😣😣
https://youtu.be/59AvFkmvoBA
I find this out after I replaced the seal. I've seen cracks before but not from here.
Gonna try a JB Weld patch till I get a new case. |
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vwkirb
Samba Member
Joined: January 16, 2007
Posts: 812
Location: Athens, GA
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| Posted: Wed May 23, 2018 7:26 am Post subject: Re: Hairline crack in case |
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Oh wow, I've never seen that before..
I think you maybe able to get away with jb weld there for a long time if you prep it correctly. Maybe look into a higher grade epoxy used in industry, in fact... ask raygreenwood, he probably could give you a good idea of what to use, he works with those types of products in industry.
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Wed May 23, 2018 8:10 am Post subject: Re: Hairline crack in case |
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Epoxy may work as it's a non pressure area.....
Next time you tear engine down have case welded, probably get by without having to get 'new" case....
Dale
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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Wed May 23, 2018 8:36 am Post subject: Re: Hairline crack in case |
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For a little crack, it makes a big mess. This after 12 hours of sitting.
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vwkirb
Samba Member
Joined: January 16, 2007
Posts: 812
Location: Athens, GA
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| Posted: Wed May 23, 2018 8:47 am Post subject: Re: Hairline crack in case |
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When you do go to jb weld or whatever that area, id drain all the oil, then id spray that area with brake clean multiple times, then i would heat up the area with a torch to drive out any remaining oil, then i'd spray it with brake clean some more.
Prep the area with with sand paper to give it tooth and clean again and apply according to manufacturers suggestions.
It's all about prep, there will only be a mechanical bond holding and sealing the epoxy in place.
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Boolean
Samba Member
Joined: January 19, 2012
Posts: 1712
Location: Stockholm
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| Posted: Wed May 23, 2018 9:15 am Post subject: Re: Hairline crack in case |
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Seal the case up and connect a shop vac to crankcase ventilation. Otherwise oil will continue to seep throgh that crack for a month. The epoxy will thank you.
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vwkirb
Samba Member
Joined: January 16, 2007
Posts: 812
Location: Athens, GA
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| Posted: Wed May 23, 2018 9:30 am Post subject: Re: Hairline crack in case |
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| Boolean wrote: |
| Seal the case up and connect a shop vac to crankcase ventilation. Otherwise oil will continue to seep throgh that crack for a month. The epoxy will thank you. |
Pulling a vacuum on the case will help, I bet it would help if you could do it the complete time until the epoxy cures.
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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Wed May 23, 2018 8:06 pm Post subject: Re: Hairline crack in case |
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| vwkirb wrote: |
| Boolean wrote: |
| Seal the case up and connect a shop vac to crankcase ventilation. Otherwise oil will continue to seep throgh that crack for a month. The epoxy will thank you. |
Pulling a vacuum on the case will help, I bet it would help if you could do it the complete time until the epoxy cures. |
Great ideas. I drained oil and what's dripping now is just the leftovers. Seems to have slowed down a lot. I really like the vacuum idea. Might give it a try on Friday depending on how it looks. |
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esde
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Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Wed May 23, 2018 8:52 pm Post subject: Re: Hairline crack in case |
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flip it upside down, or at least stand it on the crank pulley.
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modok
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Joined: October 30, 2009
Posts: 26785
Location: Colorado Springs
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| Posted: Wed May 23, 2018 8:55 pm Post subject: Re: Hairline crack in case |
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It may be more effective to grind it out, maybe 1/8 wide and as deep, to use epoxy. Most types of epoxy don't work to penetrate into little gaps.
It must have been a flaw in the casting. Can't see how it would crack there otherwise. |
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udidwht
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Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Thu May 24, 2018 8:46 pm Post subject: Re: Hairline crack in case |
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Or the case was dropped to hard on that area when the engine was out.
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UK Luke 72
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eashc
Samba Member
Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Thu May 31, 2018 3:44 pm Post subject: Re: Hairline crack in case |
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Finally got back to the bug. Brake cleaned and scrub a bit, I guess its not a crack as much as a hole. Couldn't find my epoxy, so off to the store and will try to plug it up tomorrow.
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sawed off
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Joined: September 15, 2016
Posts: 428
Location: Idaho
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| Posted: Thu May 31, 2018 4:21 pm Post subject: Re: Hairline crack in case |
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| If its a hole and theres nothing to worry about behind it I would think about drilling it out and installing small allen pipe plug. |
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Cusser
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Joined: October 02, 2006
Posts: 31362
Location: Hot Arizona
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| Posted: Thu May 31, 2018 8:07 pm Post subject: Re: Hairline crack in case |
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| sawed off wrote: |
| If its a hole and theres nothing to worry about behind it I would think about drilling it out and installing small allen pipe plug. |
Me too !!!!
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VW_Jimbo 
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Joined: May 22, 2016
Posts: 9960
Location: Huntington Beach, CA
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| Posted: Thu May 31, 2018 9:14 pm Post subject: Re: Hairline crack in case |
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| sawed off wrote: |
| If its a hole and theres nothing to worry about behind it I would think about drilling it out and installing small allen pipe plug. |
I 3rd this idea .
On a side question. Has anyone tried soldering a crack in a case? Like in water plumbing systems. We solder up all joints. Would silver solder work or is there a molecular difference which renders it incapable of filling and staying bonded?
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
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modok
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Joined: October 30, 2009
Posts: 26785
Location: Colorado Springs
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| Posted: Thu May 31, 2018 9:25 pm Post subject: Re: Hairline crack in case |
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It is not impossible, but very difficult.
In my experience, solder works very poorly on cast aluminum or magnesium.
it works ok on extruded or billet aluminum, but you try it on a casting and it just won't tin.
Last edited by modok on Thu May 31, 2018 9:27 pm; edited 1 time in total |
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jason
Samba Member
Joined: August 07, 2002
Posts: 3444
Location: Garage
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| Posted: Thu May 31, 2018 9:26 pm Post subject: Re: Hairline crack in case |
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| It’s obviously in the corner and thin. I’d like to see you put a plug in it. |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26785
Location: Colorado Springs
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| Posted: Thu May 31, 2018 9:31 pm Post subject: Re: Hairline crack in case |
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Look up Sealace #4 aluminum plugs, and imagine them in there.
I'd like to see it properly epoxied, but I bet it's not going to happen  |
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VW_Jimbo
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Joined: May 22, 2016
Posts: 9960
Location: Huntington Beach, CA
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| Posted: Thu May 31, 2018 9:34 pm Post subject: Re: Hairline crack in case |
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| modok wrote: |
It is not impossible, but very difficult.
In my experience, solder works very poorly on cast aluminum or magnesium.
it works ok on extruded or billet aluminum, but you try it on a casting and it just won't tin. |
Thanks! It was a thought. Always thinking outside the box for answers.
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
| TDCTDI wrote: |
| Basically, a whole bunch of fuckery to achieve a look. |
| 67rustavenger wrote: |
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