Thought it was one of my oil cooler lines, replaced it went on ahead and changed my oil then. Got up this morning and in my skid pan again and I can't figure out where it's coming from. Check all the bolts, oil filter no leaks around them. Any help would be appreciated thanks.
Oil leak on a 2021 RMAX2
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Have you checked your air intake for oil?
There is a small plastic cap with a clamp on it on the under side of the filter housing.
Several others have found this to be the source of oil due to the oil tank being overfilled.
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It was leaking before you decided to change the oil, correct?
Shouldn't be doing it on a fairly new machine but just to be sure check the weep tube that attaches to the waterpump at about the 5 o'clock position. In this link it is the nipple sticking downward between the (2) part nos. 39 in the schematic. May have to take some plastics off to get a good look. https://www.partzilla.com/catalog/y...ine-rmax-2-yxe10wpamw-b4m41/crankcase-cover-1 There is a black rubber piece of tubing attached to it , about 10" long, (part no. 30). May have to use a mirror to see it very well, make sure it is not being pinched by the engine mounts, or anything else, while looking at it. If oil is leaking out of this black tube, verify to make absolutely sure that is where it is coming from because if it is then the seal on the oil side of the water pump is bad. This is a pretty big job to replace and if it is still under warranty definitely something you want a dealer to do. As long as you keep the oil tank filled to the correct level it won't hurt to run the machine, but it will continually get worse to the point that you will have a pretty good puddle of oil on the floor underneath the machine, after it sits for a few days. As I first mentioned, I would be surprised for this to be the problem on a fairly new machine.
As Budro2 already mentioned, check the air breather tube, part no. 51 in the same above schematic, can do from underneath without taking anything apart, using a flash light. While there also look for oil in the part no. 54 (semi-transparent plastic end cap). Remove the plastic end cap and if there is oil in it that is most likely your problem and it is leaking out one of the air breather joints. If there is oil in the plastic end cap it is from the engine oil tank being over filled.
Edit: I see where you already mentioned that you checked the plastic end cap on the breather tube.
As Budro2 already mentioned, check the air breather tube, part no. 51 in the same above schematic, can do from underneath without taking anything apart, using a flash light. While there also look for oil in the part no. 54 (semi-transparent plastic end cap). Remove the plastic end cap and if there is oil in it that is most likely your problem and it is leaking out one of the air breather joints. If there is oil in the plastic end cap it is from the engine oil tank being over filled.
Edit: I see where you already mentioned that you checked the plastic end cap on the breather tube.
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Check your oil cooler line joints. They are not one piece. They have joints where they are connected with o -ring seals.
Well took some plastic off checked out the weep hose and it wasn't leaking, but behind the water pump there was dripping of oil so I say the oil seal behind the water pump is leaking pretty good. It just made me of mad seeing that. So I'll call the dealership tomorrow and see what they will do about it. 1163 miles on it .
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How old is it?
I think they come with a 6 month warranty unless you bought an extended warranty.
Ralph, in the parts schematic I linked to earlier, are you saying it is leaking around the o-ring, part no. 25?
Yea, that is part no. 25, o-ring. I think yours is the first one I have ever heard of leaking there.
If you have it where you can get to the bolts, it might be something as simple as the bolts being loose. If you do tighten them be sure to tighten them to the correct ft/lbs. of torque.
Edited to correct in Post No. 19
If you have it where you can get to the bolts, it might be something as simple as the bolts being loose. If you do tighten them be sure to tighten them to the correct ft/lbs. of torque.
Edited to correct in Post No. 19
I can look it up, give me a few minutes.
Looking at the Service Manual it shows it a lot clearer than the partzilla parts schematic I linked. Since you said it is behind the weep hose I was incorrect in saying it was the Part No. 25 o-ring because that is in front /outside of the weep hose.
The AC Magneto Cover has a gasket that could be leaking, it has (8) bolts torqued to 7.4 lb-ft. The Water Pump Housing Cover has (3) bolts also torqued to 7.4 lb-ft. The water pump housing also has a bleeder bolt, to bleed air out of the water pump.
The AC Magneto Cover has a rubber seal where the AC Magneto Wiring comes out of the side of the Magneto Cover at about the 2 o'clock position. It could be the source of the leak, too. This was a fairly common spot to leak back on the older Yamaha ATVs years ago. Yamaha pretty much had improved the rubber seal where I haven't heard of any leaking where the Magneto wiring comes through the side of the cover, but something to check.
The AC Magneto Cover has a gasket that could be leaking, it has (8) bolts torqued to 7.4 lb-ft. The Water Pump Housing Cover has (3) bolts also torqued to 7.4 lb-ft. The water pump housing also has a bleeder bolt, to bleed air out of the water pump.
The AC Magneto Cover has a rubber seal where the AC Magneto Wiring comes out of the side of the Magneto Cover at about the 2 o'clock position. It could be the source of the leak, too. This was a fairly common spot to leak back on the older Yamaha ATVs years ago. Yamaha pretty much had improved the rubber seal where I haven't heard of any leaking where the Magneto wiring comes through the side of the cover, but something to check.
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