Magnetic Oil Drain Bolt. (Transaxle or Crankcase)




Introduction: Magnetic Oil Drain Bolt. (Transaxle or Crankcase)

About: No thanks.

We all love our cars. they say that the cost of maintaining a car is higher than the cost of living. With the current cost of oil, I can see why. Rubber hoses, plastics, lubricants all come from petroleum.

I'm going to to show you a simple way to help increase your engine and manual transmission life by magnetizing the drainbolt.

Step 1: Gather Your Materials.

You will need.

Drain bolt from your oil pan
Super glue - Make sure you get a super glue rated for metal and magnets. Krazy glue does have a product that will bond metal extremely well.
small neodymium magnet (I used 8mm x 3mm magnets)
Sand paper or steel wool
Degreaser (You can use dish soap in a pinch)


Magnetic bolts are available at a relatively inexpensive cost for most makes and models. Consider purchasing one as there is a slight chance that if you do this, the magnet may come loose inside your engine.

Try this on a lawnmower or small engine first. Make sure you have this working well before you do this on your several thousand dollar car.

I take no responsibility if your bolt comes apart.

Step 3: Clean the Drain Bolt.

Using the degreasing agent, clean the drainbolt very well.

Dry the drain bolt so that there is no solvent or moisture on the drainbolt.

Step 4: Add Some Glue to the Drainbolt

You will only need a drop or two for this. do not over glue as it will not bond properly.

Step 5: Position the Magnet

Position the magnet onto the bolt. The magnet should pull itself onto the bolt and stick from magnetic force. The glue will provide the extra something to prevent it from moving.

Let the glue dry and cure for a few hours. then attempt to move the bolt with a screwdriver using light to moderate force. If this holds, then your okay.

Step 6: Replace the Drain Bolt in Vehicle.

Replace the drainbolt in your vehicle. Fill with oil ... Your done.



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    16 Discussions

    You might want to try something like JB Weld rather than superglue as it's likely to not stand up to hot oil.

    3 replies

    11 years ago

    Buy a bunch of neodymium magnets and tape them around the oil filter. This way you don't have to worry about the magnet rattling loose from the oil plug and ending up swimming around your crankcase(which could end disasterously.) It's also possible to perform this without draining the oil and it's possible to use many, many more magnets than could ever fit on the end of a drain plug.

    3 replies

    I totally agree with this!! ALL of the engines oil goes through the filter at some point in time, with more frequency than the oil would pass the drain plug. Plus, when you change the filter out, all the metal flakes stay INSIDE the filter and get THROWN AWAY with the filter.

    that's a very good idea, i'll probably do that next oil change. thanks a lot!

    Sorry but i don't think neodymium magnets are a good idea. They may be as strong as buggery and a wonder at normal temperatures but they hate heat in excess of 80°C, it will weaken them or worse. Better to use old fashioned ferrite jobs, they should be good for 300° or at least more than oil in an engine should even reach.

    Even the most basic transmission will have magnet in the drain pan, so that makes this kind of redundant, doesn't it?

    3 replies

    You would think. But I've encountered Drain plugs in vehicles that did not have magnets on them. Remember, this is a manual transmission not an automatic one. This is also a good feature for on a crankcase drain plug. This car has a magnetic drain plug for the cranckcase oil already.

    It's an extremely good idea, and I've actually tossed a magnet in the oil pan on some of my cars, and if you ever need to drop the oil pan, you'll see just how much debris it can hold. (Potential damaging debris "not" going back in your engine.)

    My standard shift has magnets in them... hell, even my father's old '84ish Mercedes 240 diesel had a magnet in there... just not on the plug itself :P

    Forgot to mention, the metal shavings will collect in the magnet, preventing them from causing further harm to your precious gears.