Question about 2001 Yamaha YZ 426 F

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I have oil in coolant and coolant in oil where do I start

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Hehehe, you have cracked cylinder wall. Replace the engine or have it professionally sleeved. Best is just top replace it.

Posted on Nov 09, 2010


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1 Answer

Generator won't start, no reading in temp oil & coolant.

Remove the coolant sensor plug if it has 2 wires then put a 10amp fuse in see if it starts.if it starts then you know your coolant sensor is can try it on the oil temp sensor also

Jun 24, 2016 | Cars & Trucks

1 Answer

Not sure everything was fine lost power and relized temp was through the roof

Once engine has cooled completely, check radiator for engine coolant. Check engine oil for frothy white which would indicate coolant in oil. Make sure engine oil is within correct levels.
Top up coolant, and then try to start engine. If engine starts, look for coolant leak. Look for white vapour exhaust which would indicate bad head gasket.
Reply as a COMMENT to this post to let me know what you find.

Apr 10, 2016 | Cars & Trucks

1 Answer

Coolant in oil

could be a bad O ring somewhere, but could be bigger problem. Maybe gasket or cracked head. If coolant in oil it is probably the latter


Jan 26, 2015 | kawasaki ZZR 250 Motorcycles

2 Answers

Why would oil be in my coolant?

Oil in coolant, white smoke at start up = blown head gasket or cracked cylinder.

White smoke is water vapor from coolant. Only at startup indicates a small (extremely small) leak -- it will get bigger. Only at startup is because as engine cools it sucks water into cylinder. A compression check will tell you which cylinder is the problem (could be multiple)

May 23, 2012 | 2000 Ford F350 Super Duty Super Cab

1 Answer

Win i start the car and look under the hood, there is oil coming out of a box that is, on the side of the block. But above the oil filter ?? . How do i fix that, is it a gasket or what ??

That is the engine oil cooler. There is a 'O' ring between it and the oil filter mount. They harden and crack.

Ask your dealer for the large Oil Cooler 'O' Ring.

Remove oil filter. Remove exposed pipe nut holding oil cooler to housing. If nessacary, drain coolant so you can disconnect coolant hoses from cooler or catch coolant as hoses disconnected. Swing oil cooler away and remove old 'O' ring.

Place new 'O' ring with grease on oil cooler it to hold it in place and reassemble. Tighten oil filter pipe nut to around 18 ft lbs .

Refit oil filter. Refit coolant hoses and top of oil and coolant.
Run engine to check for leaks and allow to cool. Top of coolant to COLD level if required.

You will need hose clamp pliers and wrench for oil cooler pipe nut. Pliers can be obtained from most parts stores.

Jan 12, 2011 | 1996 Volkswagen Jetta

1 Answer

Engine oil is mixing with coolant

You need to find it, and not run it, as coolant in the oil destroys things fast. Pressure test your coolant system to find a leak. You might be looking at head gasket, or even water pump seal area to start.

Jun 22, 2010 | 2005 Honda CRF 250 R

4 Answers

I accidently put antifreeze instead of oil in my car what can or should I do?

Change the oil and filter, run it for a day and change it again, I know it can be expensive, but you want to make sure all the anti freeze is out of it.

Apr 19, 2010 | 1987 Porsche 924

2 Answers

Coolant leaking into the engine oil. I'm guessing

its more than likely either your head gasket or intake gasket. You either have the 3.4 or 3.8 engine and they are well known for these to leak.

Sep 29, 2009 | 1997 Chevrolet Monte Carlo

1 Answer

Overheating & won't start. Oil & coolant OK.

Sounds like your thermostat is stuck in the closed position. I'd replace the thermostat and flush & refill the coolant.

May 07, 2009 | 1995 Ford Explorer

1 Answer


sounds like the head gasket is no good.pressure is getting into the coolant and overpressurising the resevoir.
if coolant is in the oil,low oil pressure triggered the oil light and check engine trigger results from lost compression.
a compression test will tell you.take a look at the coolant,is there oil in it?

Apr 23, 2009 | 1996 Mercury Mystique

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