How Can I Repair Cast Aluminum Kettle

How to Repair a Cast Aluminum Crankcase

by Kevin Johnston

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When you accidentally go a hole in your crankcase, your first reaction may be that the engine is ruined. Oil volition leak out and your engine will non run. If the crankcase is fabricated of cast aluminum, you should exist enlightened that you can't weld it, because aluminum melts at lower temperatures than other metals. Withal, you tin can repair a pigsty or fissure in an aluminum crankcase. Using some special materials and techniques, you can set up your crankcase and make it watertight -- or better yet, oil-tight -- so that your engine can run safely.

Step 1

Utilise a degreaser and a wire brush to remove grease and clay from the crankcase. Apply degreaser to both the inside and exterior of the crankcase. This comes every bit a thick liquid yous pour on and spread with a cloth. Scrub all surfaces you accept practical the degreaser to. Pay detail attention to the areas where you will be applying oestrus equally you repair the crankcase. Rub off the degreaser with a make clean cloth, and rinse the crankcase thoroughly with soap and h2o.

Step two

Cut a piece of scrap aluminum to embrace the pigsty. Do this past using "C" clamps to clamp a sheet of aluminum to a work table. Use a round saw with a carbide blade to cut the aluminum then that y'all end up with a rectangle that will cover the hole in the crankcase and extend at least 1 inch beyond the hole on all sides. Rub a candle on the blade of the saw to aid lubricate it, only do non melt the wax. The heat from sawing will cook it during cut, lubricating the blade.

Footstep 3

Heat the crankcase and the scrap aluminum patch. Use a propane torch to estrus the crankcase and the aluminum flake where the chip touches the edges of the hole in the crankcase. Aluminum solder melts at a lower temperature than aluminum, then do not apply the propane flame straight to the solder, because it will melt away as well fast. Heat the metal instead, and then impact the solder to the metal where the patch and the crankcase meet and form a seam. The solder will melt and see the seam.

Step 4

Solder the within of the patch. Utilize aluminum solder to the inside of the crankcase where information technology has been patched. Place the solder forth the seam formed by the edges of the hole and the patch.

Pace 5

Apply liquid sealant. Car-repair sealant comes in a tube that y'all can apply to metal parts to stop leaks. Though information technology is often called a liquid, information technology comes as a paste. After the solder and the metallic take cooled to room temperature, apply sealant to the inside seam by squeezing the tube as you run the tip along the seam you lot desire to seal. Information technology will form a tight seal to your metallic seams on your crankcase repair job.

Put water in the crankcase and allow it to set up overnight. Check for drips the next solar day. If you find any, utilise a 2d glaze of liquid gasket.

References

Tips

• Make sure the solder you use is made specifically for aluminum.
• Automobile-repair sealant that is suitable for engine repair comes under the brand names Liquid Gasket, Loctite, Permatex and Durafix.

Things You'll Need

• Degreaser
• Wire brush
• Circular saw
• Carbide blade
• "C" clamps
• Wax candles
• Propane torch
• Aluminum solder
• Car-repair joint sealant

Writer Bio

Kevin Johnston writes for Ameriprise Financial, the Rutgers University MBA Program and Evan Carmichael. He has written virtually business organisation, marketing, finance, sales and investing for publications such as "The New York Daily News," "Business Age" and "Nation'south Business." He is an instructional designer with credits for companies such as ADP, Standard and Poor's and Bank of America.

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