WR125r NOT GOOD

[HappyDays]

Hi all

We have a WR 125r and went to change the oil, on inspection the oil looks like milky coffee.
Would this be the head gasket or the water pump seals?
Any help, please

[Beehive Bedlam]

Could just be condensation in your engine.

Have you checked the coolant level?

[stinkwheel]

Well. There's water got in there somehow. Both of your suggestions are possible.

If it's done a lot of short runs in cold weather, mayonaise formation can also be straight condensation.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[HappyDays]

Do the bikes have problems with the water pumps seal or more so the head gasket?
Also whats the best way to flush the engine?
Was thinking bit of oil and diesel mix
Cheers
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Liquorice Torpedoe

[HappyDays]

Just to add, bike runs with no smoke but the water level in the rad does drop a bit.
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Liquorice Torpedoe

[Beehive Bedlam]

[HappyDays]

Going to do the water pump seal and then change oil to see if it goes milky again
Got some cheap 10/40 before I put better oil in.
Cheers
____________________
Liquorice Torpedoe

[cb1rocket]

Don't waste your time yet on water pump seals. Wait till summer, keep an eye on the water level.
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Honda H100S2 Rebuild - https://www.bikechatforums.com/viewtopic.php?t=253852

[stinkwheel]

If you want to flush the engine, do it by doing a short interval oil and filter change. Get it nice and hot drain the oil while it's still reasonably hot (obviously take care not to burn yourself).

Use cheap engine oil of an appropriate viscosity. Don't put diesel in it.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[MCN]

Before you get all the tools oot.

Make sure you have a problem.

If you fix something that wasn't broken and you still have the same problem what good will that do?

Change the oil.
Diesel will flush it out if it is really creamy thick but is not much better than fresh oil if the oil is still 'flowing' and not like butter yet.
You will still have to flush out any Diesel with fresh oil again anyway.
Replace the Filter (if fitted).
Park the beast in a place you will always have access to. (You will have to park the bike in the exact same position and at the same angle of dangle in a few days.)
With the engine off and cold.
Set the coolant level to the 'exact' correct level.
Run it for a few days and then let it cool down in the place you set the coolant level.
If you have lost coolant then you have an internal leak.
Not likely that water gets to the oil via the seal as most pumps have a tell-tale hole to vent coolant out of the engine.

Head gaskets are normally not a concern unless the engine has been roasted at some point in its life. Run without coolant or the coolant boiled off by over-loading or other cooling system problems choked radiator (Internally/Externally), knackered fan worn coolant pump vanes.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[HappyDays]

Thanks for all your advice with this.
Will see how it goes when I do the oil change.
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Liquorice Torpedoe

[stinkwheel]

I generally find head gaskets fail by allowing exhaust gas into the coolant rather than coolant into the oil. Not saying a coolant leak is impossible but of the pressures exerted on a head gasket, combustion gasses are by far the highest.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[HappyDays]

Hi all,
Going to do the timing as well, is the valve clearance below correct?


Intake 0.10 - 0.14 mm

Exhaust 0.20 - 0.24 mm

Lock nuts 7 nm

Case screws 10 nm

Cheers
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Liquorice Torpedoe

[Chris45]

So we've gone from a milk apperance in the oil to valve clearances

Read the previous posts and save yourself a heck of a lot of time and bother. Flush the sump (I prefer parrafin) and refill with budget oil. Top up the rad and use the bike, checking the oil and water periodically. If water is getting into the sump, that's a major problem but until you've gone through some BASIC and SIMPLE checks you won't know.
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Honda CG125>Suzuki GT185>Honda CB 250N>Suzuki GSX400>Honda CX500B>Kawasaki GPZ305> Kawasaki GPZ550>Kawasaki GPZ500S+BMW 650GS

[........]

The quantity of water required to turn the oil in the sump into "milky coffee" is not going to be due to condensation.

[stinkwheel]

[HappyDays]

Hi,

Well picked up the bike with no history but it does run with no smoke just a bit tappy. Looks like the Valves gaps may need doing.
The Oil in water subject, what would you do first if its the same after we change the oil.

1 - Pump seal kit or 2 - head gasket.
Just to note the Water expansion and rad are all clean no scum.
The sump had milky oil in it.

Cheers
____________________
Liquorice Torpedoe

[HappyDays]

[HappyDays]

[stinkwheel]

[HappyDays]

[HappyDays]

Well I've done the test and not good.
Filled the radiator then checked the oil and the water constantly drops and the sump oil level raised milky.
Only run it for 4/5 minutes at tick over.
Then we have 5 slow amber blink's followed by 5 fast amber blinks.
So now need to find how the water is getting in..
Any one know what the blink codes are?

Thanks
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Liquorice Torpedoe

[stinkwheel]

[HappyDays]

Will give it a go with the new Pump kit first and yes that level seems to drop fast, also if it was a crack then the bike would not run smooth?
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Liquorice Torpedoe

[stinkwheel]