They include wiring diagrams and technical service bulletins. Get the BEST auto repair information and are professional-grade shop manuals-period. If do a cheap fix, you risk destroying your engine. Things to keep in mind.Īn oil leak from the drain plug can cause your engine to run dry. Personally, I think this is a stupid idea. The theory is that the epoxy fills in the gaps. Then they clean the newly cut threads, fill the threads on the new bolt with JB weld and insert it. Guys use the oversize bolt to tap new threads. OR, refer to this oil drain plug size chart JB Weld and oversize oil pan drain plug To purchase an expanding rubber oil drain plug, just take your old drain plug to the auto parts store and have them match it up with a new plug. Never count on a rubber plug for the long term. Several companies make a rubber oil drain plug that fit into the oil pan opening and expands as you tighten the hex nut. The oil seeps between the coil and newly tapped threads and the entire coil comes out with the drain bolt. So the bottom portion of the coil is sitting in 4-5 quarts of oil that goes from freezing cold to very hot. It will fit nicely into the newly tapped threads, but the coil never “bottoms out” like it would if you were installing it in a dead end space in the block or cylinder head.
The helicoil is constantly submerged in oil. But it isn’t the best solution for oil drain plugs.Here’s why. You drill the stripped threads out, tap threads into the new hole, then thread in the heli-coil. Helicoil insert for new oil pan drain plugĪ helicoil is a great way to fix stripped threads. An oversize drain plug simply doesn’t cut deep enough threads. To retap a hole properly, you really need to drill out the old threads and use a tap that cuts deep enough into the metal to make real threads. If it’s not, the new bolt head won’t sit flush with your oil pan and it won’t seal.Ģ. To work properly, the oversized drain plug must be perfectly square to the stripped opening. Does it last? Yes, but only for about 6 oil changes. Cuts new threads into the oil pan and the upper portion of the bolt seals against the pan.
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