Question about 2004 Yamaha YZ 250

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Oil leaks from overflow line on the power valve. What causes this and how do I stop the leaking?

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Mixture is to rich not all the oil is being burnt inside the head when you are driving the bike try turning the air screw in by half a turn then try it again you may have to play with the screw to get it in the right place for you bike

Hope this helps


Posted on Apr 05, 2011

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I have ktm sxf250 2008...the radiator gets hot really quick and losing coolant from the drain pipes...what would be the problem....thanks

Posted on Jul 20, 2015


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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2003 ford ranger 4.0 2 wd has raw fuel leaking from exhaust

This is usually due to a defective fuel injector. If the injector stays open, once the vehicle is shut off, all the remaining pressure in the fuel system will drain fuel through the injector, fill the cylinder, and overflow through the exhaust valve into the exhaust lines. The downside is that this injector could also be causing fuel to get into the engine oil by leaking around the piston rings. This will greatly reduce the oil's ability to lubricate and increase engine wear immensely. This issue needs repaired ASAP. Have the injectors checked, and any defective ones replaced. Have the oil and oil filter changed as a precaution as well.

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Hi, Anonymous and the usual suspects are:
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I have a toro z master that has white smoke and oil coming out of muffler. the compression is fine. what can be causing this?

check the oil and see if it smells like gas and over full the needle vavle in the carbs leak then the carb overflows into the engine change the needle and seat then change the oil a couple time then add a shut off valve in line on the fuel line and if the oil doesn't smell like gas and overfull then the head gasket might be blown

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2001 Jeep Cherokee Classic - 90K miles

First thing you need to do is actually verify exactly what is leaking. A leak that appears to be from under the engine can be caused by a valve cover gasket (anything up top will run down) I have no idea what valve would need replacement but on the valve cover towards the rear, there is a orifice fixture that replaces the pcv valve. they can be cleaned out and re-used by spraying carb cleaner through them and using a thin piece of wire to loosen any crud in there.(remove from cover to do that) Make sure there is vacuum in the line going to it so it is able to work. (clean out line and fitting if no vacuum). Doing the above lessens crankcase pressure and often will stop leaks.
If the leak is from the rear of the pan, there are two gaskets (a gasket and a seal). The oil pan gasket rarely leaks and most often it is the rear main seal that needs replacement. To do this correctly the transmission needs to be removed. If the leak is slight, consider using lucas engine sealer. It is one of few products that will not harm any internal components and will in many cases either lessen or stop a leak.(takes some time though as most leaks are caused by hardened seals that take time to soften up again).
Did the shop cause the leak? It's possible but only if they loosened valve cover or pan bolts on purpose....I can't see any shop doing that as part of a trans service and if done intentionally to cause a leak, they would be causing themselves far more grief than it is worth!!! So, my answer to that is no.

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I have a burnt oil smell in the cabin on occaision...cannot find a leak anywhere

very common for the valve cover gasket to go bad on these cars, which would cause this smell. also if it's an XI check the front axle boots for leaks and check your power steering cooler lines.

Nov 17, 2009 | 2003 BMW 325

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Have 1999 ford taurus front wheel drive car that transmission leaks.does not always leak but when it does it leaks a lot while driving.fill with oil and will do fine for several weeks without leaking and...

transmission oil expands when it becomes hot so and is equipped with an overflow for it leaking the pan itself is noted for rusting and even a pinhole or many will cause it to leak

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Hotpoint waterheater leak

The 'overlflow line" is actually the discharge pipe from a safety valve. You should call a plumber to check it out. It could be simply the safety valve going bad but there could be other problems causing the problem. What ever you do, DO NOT plug the line because this could cause the water heater to explode.

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I have a 2000 1200 custom sportster. It leaks oil out of a overflow tube under the seat.It leaks on the rear end when riding or on the grnd when parked. One mech replaced trans seal, still leaked. Another...

if the oil tank is above the crank case, inspect the oil pump check valve. go online and study the check valve's functional purpose and see to it that the vale is operating properly. it should not be an expensive fix.
if you reroute hose be carefull of rear tire annnd what does the oil level in the oil tank sit at when full and after the leak happens after -say a day of riding- a week  

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1 Answer

Oil leaking out of overflow

just check the crankcase filter to make sure it isn't stopped up if it is that will make the crankcase build up pressure and blow the oil out

Jan 24, 2009 | 2004 Yamaha YZ 250 F

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