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Car Forum / Subaru Cars / May 2009Torquing oil drain plug
The torque setting given in maintenance manual for oil drain plug is measured when the plug is coated with oil, or when it is dry? I hope it's the first case, because there is no easy way to remove all oil from the drain plug and the drain hole. On the other hand, if the figure given is measured when dry and I follow it without cleaning off the oil, I would end up overtightening the plug. What's the correct thing to do? > The torque setting given in maintenance manual for oil drain plug is > measured when the plug is coated with oil, or when it is dry? [quoted text clipped - 6 lines] > > What's the correct thing to do? Actually I don't think it matters. Whether wet or dry, you will NOT be seating the plug against the pan. The point is to crush the sealing ring enough to ensure it seals, and that means the plug is NOT up against the pan. The idea is to compact the sealing ring but not destroy it by overly crushing it. The torque rating is for when using an air wrench or other tool that simply snaps onto the plug. However, it is likely you will be using a wrench with a handle so you can easily guage how much you rotate the wrench. Turn the plug by your fingers until it is tight. Rotate an additional (pick just one): - 1/4 turn for "solid" metal gasket seal. - 1/3 turn for formed metal gasket or plastic ring. You do NOT want to cinch the oil plug up against the pan. If there is still a drip after torquing as directed above, rotate a maximum of a further 1/4 turn. If there is still a drop, get a new gasket/ring. If you're doing your own oil change, replace the sealing ring. Oil change shops don't (unless you ask and they carry the part). Rather than rely on a prior-crushed ring, use a new one. >> The torque setting given in maintenance manual for oil drain plug is >> measured when the plug is coated with oil, or when it is dry? [quoted text clipped - 30 lines] > change shops don't (unless you ask and they carry the part). Rather > than rely on a prior-crushed ring, use a new one. Good post. Additionally, double check that the the original factory washer is not painted in place. Particularly if this is the first oil change! Mine was. It's unlikely to still be there on an older car because stacking the washers will usually result in dripping. Carl > washer is not painted in place. Particularly if this is the first oil > change! Mine was. It's unlikely to still be there on an older car > because stacking the washers will usually result in dripping. And DO use a new crush wsaher. I've had to fire more shops who were too lazy to be troubled with it... and ohhh man that pisses me off. If you use a crush washer, you can feel when the washer is being crushed, and I haven't had any need to measure torque on it (and I haven't had leak issues or come anywhere close to not being able to get the plug back out next time.  Signature-- Todd H. 2001 Legacy Outback Wagon, 2.5L H-4 Chicago, Illinois USA >> washer is not painted in place. Particularly if this is the first oil >> change! Mine was. It's unlikely to still be there on an older car [quoted text clipped - 7 lines] >haven't had leak issues or come anywhere close to not being able to >get the plug back out next time. The Subaru dealer here does not stock crush washers. Just flat ones for at least 7 or 8 years. I have never had a leak problem, though. On May 19, 10:52 pm, kap...@example.com wrote: > >> washer is not painted in place. Particularly if this is the first oil > >> change! Mine was. It's unlikely to still be there on an older car [quoted text clipped - 12 lines] > The Subaru dealer here does not stock crush washers. Just flat ones > for at least 7 or 8 years. I have never had a leak problem, though. If you buy an original filter from Subaru, you'll note it will come with a crush washer. > On May 19, 10:52 pm, kap...@example.com wrote: >>>> washer is not painted in place. Particularly if this is the first oil [quoted text clipped - 12 lines] > If you buy an original filter from Subaru, you'll note it will come > with a crush washer. I've been buying my filters from www.subarugenuineparts.com and they have a washer taped to the box - but I think they are listed separately. Carl > If you buy an original filter from Subaru, you'll note it will come > with a crush washer. When I bought them fro ma local dealer, they were separate. When I bought with subarugenuineparts.com (thanks Carl for that tip moons ago), they all came with the washers taped to each filter box -- a nice touch. -- Todd H. 2001 Legacy Outback Wagon, 2.5L H-4 Chicago, Illinois USA Doesn't matter, ft/lbs are the same whether dry or lubed, lubed is just easier to get there. Also, I can get about 3 oil changes from the same crush washer, 4 is pushing it. SignatureJohn |
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