Oversize oil drain plug

[ToddStyles]

I had to replace my oil drain plug with an oversize M14. The plug is about a 1/4" or so longer than the magnetic plug I replaced. It appears there is plenty of clearance, but I wanted to check with the pros on the board before I started the bike. Any issues with the slightly longer plug?
thanks.

[nichols750]

i put one of these in a couple of monhs ago and i haven't had any problems with it at all.

[ToddStyles]

Thanks for the info. I used a rubber washer with the oversized plug and I'm still getting a slight drip. I'm going to try the washer that is rubber with a metal outer ring. I figure the rubber is distorting some when I tighten up the plug.
Todd.

[Nessism]

Thanks for the info. I used a rubber washer with the oversized plug and I'm still getting a slight drip. I'm going to try the washer that is rubber with a metal outer ring. I figure the rubber is distorting some when I tighten up the plug.
Todd.

You'd be better off with a copper or aluminum washer. With rubber you don't ever really get the plug tight which can lead to leaks.

[Bill C.]

oversize plug

I've been running an oversize oil drain plug on my 850 for a year now with no problems. Used the stock rubber gasket, it was a real tight fit over the oversize plug. Also the plug I used had a flange on the bolt head. Got mine at Autozone. It was about a 1/4 in longer than stock.

[ToddStyles]

When I picked up the rubber and metal washer at the parts store (which I have not installed yet), they had several types of oil plug washers. Solid copper, solid aluminum, "crush-type" copper, fiber, plastic/nylon and a few others it seems like. I do remember the rubber gasket that I used originally (that's leaking now) wasn't a tight fit over the bolt threads. It came with the oversize plug.

The oversize plug itself is a nice tight fit into the pan. I'm still confused about what type of plug and gasket combo will eliminate my drip.
Todd.

[Nessism]

For a good seal you want a smooth surface on both the bolt and the pan to pinch the washer between. Even with good sealing surfaces the washer still needs to crush a little and conform to assure no leak path is present. You want a firm material for the washer so it will crush a little but still allow the bolt to reach a decent torque level so it won't loosen later. Copper is a popular choice but aluminum and plastic are popular as well. Rubber washers should be avoided since it's hard to get a good clamp on the bolt. O-rings are different since they are usually trapped inside a groove or such so the bolt itself is able to reach torque.

Hope this helps.