opus Posted October 3, 2011 Share Posted October 3, 2011 Can I pull it and reseal it without pulling the pulley off the front of the crank? Quote Link to comment Share on other sites More sharing options...
aba4430 Posted October 3, 2011 Share Posted October 3, 2011 If you are speaking of removing the main crankshaft pulley, you do not have to when working on the EA81 oil pump. The oil pump does need to be removed when replacing seals, o-rings, springs and balls. Quote Link to comment Share on other sites More sharing options...
opus Posted October 3, 2011 Author Share Posted October 3, 2011 Yes, I just dont want to pull the pulley off. Wasnt sure if the pump would come out with the pulley still on. Bonus, thanks, Quote Link to comment Share on other sites More sharing options...
hatchsub Posted October 4, 2011 Share Posted October 4, 2011 yup it will with no problem. Quote Link to comment Share on other sites More sharing options...
bheinen74 Posted October 4, 2011 Share Posted October 4, 2011 yup it will with no problem. only problem will be chance of cracking the oil pump. You should read up on how to remove the pump, you want to leave the oil filter on it for a handle to aid removal. DO NOT pry the pump off, it will crack if you do. I learned the hard way. Quote Link to comment Share on other sites More sharing options...
Jessekrs123 Posted October 4, 2011 Share Posted October 4, 2011 only problem will be chance of cracking the oil pump. You should read up on how to remove the pump, you want to leave the oil filter on it for a handle to aid removal. DO NOT pry the pump off, it will crack if you do. I learned the hard way. This. That damn pump is so sensitive and will warp even with the tiniest bit of force. As bheinen said, he learned the hard way, as did I. I very GENTLY removed my oil pump and still ended up warping the damn thing. After the re-seal it was still leaking, so I ended up getting a new pump and that solved the problem. The old parts guy at my dealer said it was very hard, even for their well trained techs to not warp the pump upon removal back in the day. He said they always kept some in stock because 90% of the time they would warp, and he said whenever they took the pumps off they would just replace it to avoid putting the old one back on and having it leak anyway. I got a new pump at the dealer for like $60. You can attempt to re-seal it, but there is a good chance it will leak anyway. Good luck. Quote Link to comment Share on other sites More sharing options...
opus Posted October 4, 2011 Author Share Posted October 4, 2011 Wow did that come out easy! Quote Link to comment Share on other sites More sharing options...
Gyro Doug Posted January 16, 2012 Share Posted January 16, 2012 I have a 100hp version of the EA81 on a Gyroplane. The oil pump is now leaking. Here is my question as I am NO mechanic... I also have an oil cooler installed on this engine. I have 2 lines that run from the oil pump where the oil filter is installed back to the oil cooler. DO I NEED AN OIL COOLER? This was already installed when I purchased the engine/gyro. Do I need an oil cooler because I fly this engine at a higher RPM than when in a car? I take off at 5000 RPM and cruise at 4500 RPM. THOUGHTS? I have an oil temp gauge as part of my gauges. What temps are OK for this engine? Again, the 100 HP truck version of the 81. Reading this threads tells me I need to just order a new oil pump and not bother with fixing the existing leaking one. This sound about right? Thanks folks! Doug Quote Link to comment Share on other sites More sharing options...
robm Posted January 17, 2012 Share Posted January 17, 2012 It is in an airplane. The best is not too good for the application! Although perhaps a Gyro won't fail catastrophically if the engine does? I would still rather be very sure my engine was going to last a long time. The pumps sounds cheap at any price. Quote Link to comment Share on other sites More sharing options...
Gyro Doug Posted January 18, 2012 Share Posted January 18, 2012 Yes. Its in a Gyroplane. Subaru engines from EA81's to EJ 2.5's are relatively popular in Gyros. Especially the 2.2's & 2.5's in 2-seaters. I just don't know if I need a Oil Cooler? Thanks. Quote Link to comment Share on other sites More sharing options...
robm Posted January 18, 2012 Share Posted January 18, 2012 Keep it. The engine is putting out more HP continuously than it was originally designed to produce intermittently. It wouldn't have an oil cooler if it didn't need it. No one would add useless weight to an aircraft engine. Quote Link to comment Share on other sites More sharing options...
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