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Cleaning an ally oil pan for repair

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  • Cleaning an ally oil pan for repair

    Greetings,

    One of the main reasons I bought my Diversion was to repair a drysump oil pan damaged in a recent blow-up. As I expected the cracks are seeping synthetic oil everytime heat is applied. I heated the ally last night with a soot guide coat so as to hammer it relatively flat again and hoped it would burn off some contamination.

    Also been spraying electrical contact cleaner into the cracks. Still I'm getting instant black grainy welds. Oh- I did discover why big pieces need preheat;-))

    Any tricks for cleaning cracks available?
    Miller Diversion 165
    1966 Bridgeport Mill
    Leblond 15x 35 Regal Servoshift lathe
    Solberga SE 1425 Drill Press
    Bigass Bandsaw
    Hydraulic press
    small surface grinder
    Belt sander
    Tons of grinders and hand tools
    Knife edge Balancing rollers
    Heat and AC in the garage

    Jags and racing Triumphs

  • #2
    Crack cleaner?

    Almost makes me giggle. Is it aluminum or steel alloy?
    Mustangs Forever!

    Miller equipment.

    Comment


    • #3
      Sorry, it's aluminum.

      And between your giggle and equipment list I must wager you've been here before
      Miller Diversion 165
      1966 Bridgeport Mill
      Leblond 15x 35 Regal Servoshift lathe
      Solberga SE 1425 Drill Press
      Bigass Bandsaw
      Hydraulic press
      small surface grinder
      Belt sander
      Tons of grinders and hand tools
      Knife edge Balancing rollers
      Heat and AC in the garage

      Jags and racing Triumphs

      Comment


      • #4
        Well, it's getting better. Seems patience is my friend. I'm doing a small area and then grinding clean and moving on.

        I'd probably be smarter to cut out the bad 6"x4" area and weld in a new section but I've not practiced butt welds yet
        Last edited by GT6Steve; 11-29-2009, 02:35 PM.
        Miller Diversion 165
        1966 Bridgeport Mill
        Leblond 15x 35 Regal Servoshift lathe
        Solberga SE 1425 Drill Press
        Bigass Bandsaw
        Hydraulic press
        small surface grinder
        Belt sander
        Tons of grinders and hand tools
        Knife edge Balancing rollers
        Heat and AC in the garage

        Jags and racing Triumphs

        Comment


        • #5
          Crack repair.

          Aluminum? No problem. Find an aluminum carbide burr. It's a generally a round ended cone shaped bit for use in a die grinder. You can use a burr designed for steel but the teeth on it are much finer and it will clog. I think American Carbide sells them and a sharpening company in the northeast I've used in the past named Burns Tools sells the as well.
          Grind out the crack completely creating a gap where the crack is if an 1/8 of an inch. What your looking for is total pen here. and with aluminum you na easily brindge the gap even a 1/4 inch or more! If you try to weld back over the crack without grinding it out it will crack again, GAURANTEED! Grind it out the clean it up with acetone or one of the commercially available acids made for aluminum and weld it up. Is it cast aluminum? Cast presents a whole new set of issues as it it somewhat porous in the crack. Again grind it out first. But you'll probably need another 25 amps of heat depending in the thickness of this pan's base metal.

          Yep, Been there. Do a bunch of aluminum outboard lower unit skegs, motors, etc.

          Easy enough but watch the HAZ area of the weld. In cast it will tend to pit depending on the casting and you may have to reweld at that area, Also remember to weld with plenty of filler metal usually 4043. I always weld up thick for this crack repair business and then grind off the excess.

          There are special grinding disks made for aluminum. If you use one designed for steel it can leave contamination behind and it will be difficult to weld,

          Clean it the clean it again. Aluminum likes to be clean when you weld it.

          Good luck and ask any questions you have.
          Last edited by captkipp; 11-29-2009, 01:39 PM. Reason: spelling
          Mustangs Forever!

          Miller equipment.

          Comment


          • #6
            silly question

            Steve. you are using a/c for this right?
            Mustangs Forever!

            Miller equipment.

            Comment


            • #7
              Yes Capt. , it's AC on a Diversion.

              Thanx for the tip about grinding thoroughly and a Vee., I've not done that. And I was wondering about appropriate sanding discs, I have burrs but they are probably contaminated from porting cast iron heads.

              This is a sheetmetal pan, not cast.

              Guess I'll drive back to Airgas next Saturday.

              Is this a case where I should back up the weld with copper or is that a whole 'nother Donahue show...

              Thanx for the help....
              Last edited by GT6Steve; 11-29-2009, 02:25 PM.
              Miller Diversion 165
              1966 Bridgeport Mill
              Leblond 15x 35 Regal Servoshift lathe
              Solberga SE 1425 Drill Press
              Bigass Bandsaw
              Hydraulic press
              small surface grinder
              Belt sander
              Tons of grinders and hand tools
              Knife edge Balancing rollers
              Heat and AC in the garage

              Jags and racing Triumphs

              Comment


              • #8
                Hope this doesn't sound too stupid but, How about the acid condenser cleaner that AC guys use? Is that suitable for cleaning these areas or will it leave some residue?

                Really all, Thanx for your patience.

                I've been around good welders for thirty years and can O/A weld OK. Just now getting into electric welding for myself.

                I've always said "I'm an electrician, I can't weld unless there's a screwdriver involved".
                Miller Diversion 165
                1966 Bridgeport Mill
                Leblond 15x 35 Regal Servoshift lathe
                Solberga SE 1425 Drill Press
                Bigass Bandsaw
                Hydraulic press
                small surface grinder
                Belt sander
                Tons of grinders and hand tools
                Knife edge Balancing rollers
                Heat and AC in the garage

                Jags and racing Triumphs

                Comment


                • #9
                  Blow up...

                  Everytime we lose and engine, there is no amount of repair for the pan...Only thing bettar is the nitrious explosion in the sheet metal intakes...next one Im making out steel! That way when she blows, I just get a little more plentum space.
                  Kevin
                  Lincoln ranger 305g x2
                  Ln25
                  Miller spectrum 625
                  Miller 30a spoolgun
                  Wc115a
                  Lincoln 210mp
                  F550 imt service truck

                  Comment


                  • #10
                    My goodness YES,

                    This pan has been the biggest trial of my racing career. I was about to make it a wall decoration when I got the wild hair to learn to TIG. Now it's the reason D' etre or somethin' French like that

                    I have a stock mild steel pan laying at my feet that I thought would be a good starting point but there ya go, another project.

                    I don't want to turn this into a motorsport thread becuz I'm really asking beginners questions. More appropriate here I think???
                    Miller Diversion 165
                    1966 Bridgeport Mill
                    Leblond 15x 35 Regal Servoshift lathe
                    Solberga SE 1425 Drill Press
                    Bigass Bandsaw
                    Hydraulic press
                    small surface grinder
                    Belt sander
                    Tons of grinders and hand tools
                    Knife edge Balancing rollers
                    Heat and AC in the garage

                    Jags and racing Triumphs

                    Comment


                    • #11
                      The condenser cleaner worked!

                      I'm getting cleaner welds and grooving them with the burr is paying off as well. A lot of them are still ugly round beads like a poor boob job but the others are looking homogenous and smooth. Just need a lot more practice.

                      Thanx Capt!
                      Miller Diversion 165
                      1966 Bridgeport Mill
                      Leblond 15x 35 Regal Servoshift lathe
                      Solberga SE 1425 Drill Press
                      Bigass Bandsaw
                      Hydraulic press
                      small surface grinder
                      Belt sander
                      Tons of grinders and hand tools
                      Knife edge Balancing rollers
                      Heat and AC in the garage

                      Jags and racing Triumphs

                      Comment


                      • #12
                        When we do repairs on our stockcar (modified) ,we have to boil out the oil pans.Then clean the cracks with acetone.
                        we had a steff's oil pan give us fits until we did the above.

                        Rich
                        sigpic
                        Love the power of Blue
                        Millermatic 200
                        Sync 200
                        Lots of Tools!

                        Comment


                        • #13
                          Just what I've read -

                          Guys that weld repair Harley engine and tranny cases say to wash the case,

                          stick it in an oven low heat, bake it till oil comes to surface, wash repeat.

                          Keep doing till no more oil.

                          Comment


                          • #14
                            Important to know

                            Read the link below. It appears to be true so I would rather everybody is safe and not sorry by using the wrong cleaners etc...

                            http://www.brewracingframes.com/id75.htm

                            Hope that helps,
                            Dave
                            Oxy/Ac Large Tanks
                            Miller Swinger AC 180 (SOLD)
                            Miller Syncrowave 250DX Runner with Pulser

                            Comment


                            • #15
                              I don't use chemical cleaners for such things. Normally with some patience I'm able to get all of the oil out of a casting prior to welding with my trusty O/A torch and grinders (mostly the die grinder).
                              Blondie (Owner C & S Automotive)

                              Colt the original point & click interface!

                              Millermatic 35 with spot panel
                              Miller 340A/BP
                              Victor O/A torches
                              Lincoln SP125
                              Too many other tools to list

                              03 Ram 1500
                              78 GS1000
                              82 GL1100 Interstate

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