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everything was going great and then #382819
07/22/09 12:41 AM 07/22/09 12:41 AM
Joined: Feb 2009
Posts: 123
Jefferson, OR
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plumridiculous Offline OP
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plumridiculous  Offline OP
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Jefferson, OR
At the mopar nationals, woodburn my car was finally running good and hooking up some what good. I was cutting good lights and going rounds and the a guy said, hey do you know your leaking oil. My very costly milodon pan made for a big block dakota swap cracked. The crack is small but dumping to much oil to continue. after the pan cooled down the crack closed and doesn't leak but just a little. I was wondering if it is possible to weld this in place as it's a total pain to pull the engine. It's a low deck 512 in a 76 pacer.

I was thinking of getting as much oil out as can and fill the pan with CO2 then weld it. Is this stupid or might it work.
Re: everything was going great and then [Re: plumridiculous] #382820
07/22/09 02:19 AM 07/22/09 02:19 AM
Joined: Jan 2003
Posts: 771
Btween a rock and a hard place
moparlulu Offline
super stock
moparlulu  Offline
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Posts: 771
Btween a rock and a hard place
Is the crack down in the sump? Drain the pan good and mig it up, small tacks. Just make sure your ground is on the pan itself, as you can tear up the brgs if it grounds thru them. My

Re: everything was going great and then [Re: moparlulu] #382821
07/22/09 02:24 AM 07/22/09 02:24 AM
Joined: Jan 2003
Posts: 2,933
Finalnd, Perkele
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jyrki Offline
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Finalnd, Perkele
Just did that last week to a friends car, drained the oil out, cleaned & MIG welded. No co 2 or anything. turned out great.

Plynouth VIP '67 TT IC EFI
Re: everything was going great and then [Re: jyrki] #382822
07/22/09 02:42 AM 07/22/09 02:42 AM
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT Offline
Management Trainee
1_WILD_RT  Offline
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Today? Who Knows?
Works for some.. I was working at a shop the guy in the next stall tried to MIG a crack up it seemed like a good plan then there was a Wooof sound & the pan had a new rounder shape.... When he lowered the lift we found the valve covers didn't like the pressure much either... Fill the crankcase with inert gas...

Re: everything was going great and then [Re: 1_WILD_RT] #382823
07/22/09 03:10 AM 07/22/09 03:10 AM
Joined: Jan 2003
Posts: 1,721
Eugene, OR
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FuryBoy Offline
top fuel
FuryBoy  Offline
top fuel
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Posts: 1,721
Eugene, OR
That was one SICK PACER!
Re: everything was going great and then [Re: FuryBoy] #382824
07/22/09 08:52 AM 07/22/09 08:52 AM
Joined: Oct 2003
Posts: 11,686
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
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Posts: 11,686
W. Kentucky
I busted one on a work car many years ago. A friend of my brothers came out and brazed it up for me. It ran that way for a long time with no leaks.
Re: everything was going great and then [Re: plumridiculous] #382825
07/22/09 09:15 AM 07/22/09 09:15 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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MR_P_BODY  Offline
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Posts: 52,972
Romeo MI
I have done it many times on the car, drain it, I
grind the area clean, spray with carb/brake cleaner
then blow air through the oil filler cap, weld it
up.... set up time usually takes longer than the welding
(like said above.... ground the pan itself)
Re: everything was going great and then [Re: MR_P_BODY] #382826
07/22/09 09:45 AM 07/22/09 09:45 AM
Joined: Feb 2009
Posts: 123
Jefferson, OR
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plumridiculous Offline OP
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plumridiculous  Offline OP
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Jefferson, OR
The crack is in the bottom rear about 2 inches from the drain plug. Wten running air in the oil fill should the drain plug be out or in?

Thanks George..
Re: everything was going great and then [Re: plumridiculous] #382827
07/22/09 09:48 AM 07/22/09 09:48 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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MR_P_BODY  Offline
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Romeo MI
Quote:

The crack is in the bottom rear about 2 inches from the drain plug. Wten running air in the oil fill should the drain plug be out or in?

Thanks George..



I leave the drain plug out during the whole process
(allow the air to move better)... doesnt need to be
alot of air, just to move the vapors out
Re: everything was going great and then [Re: MR_P_BODY] #382828
07/22/09 03:42 PM 07/22/09 03:42 PM
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
Quicksilver440 Offline
I Live Here
Quicksilver440  Offline
I Live Here

Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
I'd either fill it with inert gas....or use
J-B STIK. I used on a pan and a gas tank and it lasted many years (before I sold the car)

this stuff:

http://www.jbweld.net/products/jbstik.php
Re: everything was going great and then [Re: Quicksilver440] #382829
07/22/09 03:51 PM 07/22/09 03:51 PM
Joined: Feb 2007
Posts: 5,080
organ
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maximum entropy Offline
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maximum entropy  Offline
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a friend of mine blowed his face off doing it in place. i wouldn't.

for what is the good life if not doing things thoughtfully?
Re: everything was going great and then [Re: maximum entropy] #382830
07/23/09 11:37 AM 07/23/09 11:37 AM
Joined: Apr 2007
Posts: 871
WA 98043
thecarfarmer Offline
super stock
thecarfarmer  Offline
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Posts: 871
WA 98043
I welded a pan in place (steel)... once.

I wouldn't do it again. Was more of a PITA than pulling the pan would have been.

And, what about the ash from the fine amount of residual oil that'll be inside the pan?

And, how are you going to clean ALL the oil out of the crack that you're welding?

To say nothing of the previous poster whose friend got hurt.

This ain't to say it can't be done. Obviously, it can. Just that there are some 'opportunities for learning experiences' that could possibly happen.

If it were mine, I'd just use some yamabond/hondabond to stick a patch of beer can over the offending crack until the pan could be removed for a proper repair.

Oh, and the genuine honda or yamaha sealants are GOOD - no worries.

.02

-Bill

Seduce the attractive, and charm the rest. ****** 489 C.I.D., roller cam, aftermarket heads, tunnel ram, stock '54 Dodge rear axle assembly: which of these doesn't belong?
Re: everything was going great and then [Re: thecarfarmer] #382831
07/23/09 11:50 AM 07/23/09 11:50 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

I welded a pan in place (steel)... once.

I wouldn't do it again. Was more of a PITA than pulling the pan would have been.

And, what about the ash from the fine amount of residual oil that'll be inside the pan?

And, how are you going to clean ALL the oil out of the crack that you're welding?

To say nothing of the previous poster whose friend got hurt.

This ain't to say it can't be done. Obviously, it can. Just that there are some 'opportunities for learning experiences' that could possibly happen.

If it were mine, I'd just use some yamabond/hondabond to stick a patch of beer can over the offending crack until the pan could be removed for a proper repair.

Oh, and the genuine honda or yamaha sealants are GOOD - no worries.

.02

-Bill



I've never had any issue welding them on car(done
plenty).... oil will burn if there is any in there
but it sure wont explode.... gas explodes... stick
your nose to the drain hole and smell if there is
any gas vapor... if so let it air for a period of time
Re: everything was going great and then [Re: MR_P_BODY] #382832
07/25/09 12:27 AM 07/25/09 12:27 AM
Joined: Feb 2009
Posts: 123
Jefferson, OR
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plumridiculous Offline OP
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plumridiculous  Offline OP
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Joined: Feb 2009
Posts: 123
Jefferson, OR
I just finished welding the crack up with no problems. I went an inch past the crack both ways, used a magnetic ground to the pan as close as possible, air down the oil fill.

Thanks For the help!!
Re: everything was going great and then [Re: plumridiculous] #382833
07/25/09 07:40 AM 07/25/09 07:40 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

I just finished welding the crack up with no problems. I went an inch past the crack both ways, used a magnetic ground to the pan as close as possible, air down the oil fill.

Thanks For the help!!



Glad you got it

Re: everything was going great and then [Re: plumridiculous] #382834
07/25/09 02:11 PM 07/25/09 02:11 PM
Joined: Oct 2004
Posts: 8,165
Left Coast
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BobR Offline
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Left Coast
Quote:

I just finished welding the crack up with no problems. I went an inch past the crack both ways, used a magnetic ground to the pan as close as possible, air down the oil fill.

Thanks For the help!!



I was a little late to chime in here but when I weld cracks of any kind I always drill a hole at the end of each crack. This helps prevent occurrence.

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