Change out the crush washer when it gets really deformed. Only once changed the plug when it deformed while trying to remove it. As long as I don't see oil puddles on my driveway I know it's all good.
I'm thinking of replacing the drain plug on my parents' 2008 Nissan Rogue the next time I change the oil for them. When I changed the oil for them I had a hard time removing the gasket. It was the Nissan OEM type, and I don't believe that it was placed there by the quickie-lube type service place they got their oil changed. If they had changed the gasket it would have probably been a solid aluminum or copper type.
The base of the plug has two deep gouges in them where the gasket seats against the plug. They had a dealer maintenance plan for the first few years and the oil was probably changed at a dealer with an OEM gasket. However, these things have a design that looks like it can dig into the metal of the plug.
I've got an order of ordinary M12 copper sealing washers. I intend on using these for any oil changes where I need an M12, like a Nissan or Toyota.
On my personal vehicles that I change the oil on I have never replaced a drain plug. The vehicles I have had with sheet metal oil pans I replaced the drain plug gasket every oil change. Every vehicle that I have owned that had an aluminum oil pan the drain plug has a rubber o-ring gasket that appears to last forever.
With this being said I do have a couple of spare plugs and gasket just in case. The moment you don't have a spare is the moment something breaks.
I was able to pick up OEM drain plugs and gasket off ebay for real cheap.
Originally Posted By: stchman
On my personal vehicles that I change the oil on I have never replaced a drain plug. The vehicles I have had with sheet metal oil pans I replaced the drain plug gasket every oil change. Every vehicle that I have owned that had an aluminum oil pan the drain plug has a rubber o-ring gasket that appears to last forever.
With this being said I do have a couple of spare plugs and gasket just in case. The moment you don't have a spare is the moment something breaks.
I was able to pick up OEM drain plugs and gasket off ebay for real cheap.
I just ordered a couple of OEM Honda drain plugs today. I just wanted to try something different and ordered the equivalent from an Acura dealer via the Honda eStore online parts ordering system. The prices I get are far better than I can get walking into a parts department. The plugs were $1.40 each for OEM. What I really needed was the drain plug for the automatic transmission after I'd rounded off the head a bit. That was under $8, but comes with a massive magnet. None of the Honda dealers had it in stock, and most quoted about $13 to order it.
I'm sure these are the right parts since I cross-referenced the part numbers.
Have never replaced one, but one of the current vehicles seem to have the threads a little whacked out so (was like that when I bought it) - I might pick one up next time I re-stock my stash of filters. I been replacing the metal gasket for each OC too, unlike all other vehicles I have/had I can't remember ever replacing the gasket.
I've purchased more than 1 vehicle that had an *interesting* drain plug that I had to change. One E30 I bought somebody had threaded ina spark plug - and then broke off the ceramic. It sort of sealed, it dripped a little from the center electrode, but not much. Another one I swear at one time was a temp sending unit, but I can't tell for sure. Replacement plug with the wrong threads that was cross-threaded in. People get really, really stupid......
I switched to a magnetic plug on my 328Ci when I did the first motor build thinking that the break-in from the new, very tight tolerance, pistons/rods/bearings/cams/rockers/valvetrain, etc, would result in a fair amount of metallic shavings and it turned out to be a good idea.
I just switched my 325i DD to a magnetic plug the past OC, with the car at something like 169k.