Today I changed oil and oil filter, and unfortunately I have put in to much oil. Is it bad for the engine, or could it perhaps just push it out via the crankcase ventilation? Or should I try to suck some oil back from the oil filler hole?

I have put in 2.6L but have put in about 2.9L.

Personally I'd just crack the drain nut on the frame down tube (or the crank case if you prefer), and empty approximately 300ml out into a jug...

Replace drain plug, warm up engine, check level, and top up if needs be...

J x

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JennyDakar.com

Thanks, yes maybe easier than trying to suck it out.

Still a bit curious though how an engine is affected by to much oil.

It is possible that [particularly at high speed/revs], the crankcase will pressurize and the oil blow out... if you're lucky, only though the crankcase breather [and into the airbox] as you surmise, but if you're unlucky, past the countershaft output seal, pi55ing oil all over the place...

I'm sure some engine nerd will also elaborate - but I believe it's possible oil could be forced past the valve stem seals too for example?

Anyway, best not to have too much extra oil in there... a 100-200ml might not make much difference [especially on a sump with 2.6litres in], but 300ml might be pushing it a bit?

Of course the XT does keep some of the oil in the frame, so I guess there is a bit more 'breathing space' than on a wet-sump engine, but the principle is the same...

J x

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JennyDakar.com

Thanks for the info! I would be stupid to push my luck right
I'll just drain it a little and get it right instead.

Very well put jmo, you are correct in saying too much excess oil will blow seals but as you say a relatively small amount will cause no harm.

I was once at a friends garage some years ago and a customer towed their car in complaining that it wouldnt start, on investigation it emerged he had changed the oil and filter himself and when he had put fresh oil in he had FILLED it right to the TOP (all 3 gallons of it!). Not supriseingly it wouldnt even turn over!!

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I would drain the excess oil to the correct oil level.

Not only can it cause oil leaks, the extra oil can damage the exhaust cat with contamination if it is blown through the engine breather hose into the air box.

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My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
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My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

I also filled 2.9L This problem is also treated in this thread http://www.xt660.com/showthread.php?t=16450
I took out some oil without unscrew the drain bolts.
I used a water plastic bottle 0.5L with large cap.
On the cap of the bottle i drilled 2 holes. Though each hole i passed a transparent plastic tube ( 8mm) into the bottle. One of the two outside ends was placed in the oil filler hole and the other the other one was used to suck air out.
I took out aprox 300 ml considering the 0.5 L bottle used. I couldn’t find a syringe.
I ride it 60 km and than checked the oil level: bike straight up, waited 3 minutes (had to wait was leaking) , the cleaned dipstick inserted without screwing it, and the level seems to be at the max.

This oil level check seems like rocket science.

I've changed the oil on mine 3 times,every time 2.6L doesn't even show on the stick,to get it 3/4 of the way up the stick need another half liter any others have this problem.

Done a few oil changes and when i had my bike in getting the valve checked got the my local mechanic to also change the oil. He said he put in 2.6ltrs of oil, but i never trust people so started the bike took it for a short spin around the block, checked the level of oil on the dip stick and no thing, half a litre later and we where sorted. Took a long ride home and checked when i got home and still the same about 3/4 up the dip stick.

Never had this problem at home as i never new how much i was putting in, was always a rough guess!!!!

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