Pictures of how I Replaced the Oil Pump on the Subaru Legacy Outback 2.2 engine.
GOOD TO KNOW:
- Oil Pump:
- Rotary pump driven by crank shaft. Drives oil circulation for engine lubrication and cleaning.
- Oil Pump O-Ring:
- Small rubber ring. Dealer only as far as I can tell.
- Oil Pump Sealant:
- Permatex anaerobic gasket maker #51813. I got a lot of conflicting advice from a lot of places, including the dealer. The anaerobic sealant will only harden where it is pressed between the two machined surfaces. So if a big glob is on the inside of the engine, inside the oil pump, it can not harden, because air can get to it. So it can not break off and clog anything, or jam inside the oil pump.
Cleaning the Oil Pump
After the oil pump bolts are removed, there is a reinforced area on the side strong enough to pry it off with a screwdriver. It's all aluminum, so easy does it.
Back of the oil pump.
Difficult to remove drain plugs. Big socket and a vise.
Removed screws on rotary cover.
Removed cover, exposing rotors.
Removed pressure relief valve to clean it. There is also a small washer inside the little plunger that I found later.
Rotors in a gallon milk jug cut in half, washing with an appropriate solvent, not gasoline at all. I marked the rotors with a paint pen, but the solvent (Did I mention it was not gasoline?) cleaned off the paint too. There is also a small mark pressed onto each rotor. I took a picture of where those marks were so that I could put the rotors back together in the same positions that I found them.
Picture of the O ring. Note that the old one was not seated properly, and covered with sealant. The factory manual says to put no sealant there.
Another shot of the deformed O ring.
Fixed the part number. I had the bag from the shaft oil seal in the picture.
Installing Crank Oil Seal using big socket.
No rush to seat the pump. The sealant is anaerobic, so it will not harden until installed.
Lubricating the crank shaft with oil. Manual says to also grease the inner lip of the seal (I did not grease it. How long until oil seal failure?).
Oil pump installed. A tiny bead of the sealant gooed out. Still liquid after a week.
- Then I finished my beer.
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Think: Cars are expensive, powerful, and heavy. Before I start work, I face the possibility that I will destroy my vehicle, my own life, and innocent pedestrians' lives. If anyone messes with a 4000 lb machine capable of 100 mph, these are real possibilities. If I get in over my head, I call a professional mechanic. The information on this website is provided only for entertainment purposes, and it is not intended as advice on how to service a vehicle. For all you know I made this up. Don`t believe everything you read on the internet.
Disclaimer: The technical information in these documents is provided without any warranty whatsoever and at no cost. All information is in general terms and is not meant to apply to your particular situation, be current at the time you read it, or even be correct in the first place. Improperly maintained vehicles can lead to serious injury, death, or unavoidable accidents. The author is not responsible for any errors on this site, and does not make any claim at all about the validity, safety, or veracity of the information contained on this website. Any work you choose to do or not to do on your vehicle is done at your own risk. The information on this site is not intended to serve as a replacement for professional advice, professional workmanship, dealer service, union labor, or psychological counseling. The author disclaims any and all liability directly or indirectly arising from the application or use of any information or idea contained on this or any other web site. By opening this page, you agree to never sue anyone ever or allow anyone to be sued on your behalf. The appropriate professional should be consulted regarding your specific condition. BeerGarage.com does not take responsibility for the information posted on other sites to which it links.
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Last modified: 1/27/2013