milky tranny fluid

[skid jackson]

***** update on 2nd page****

I have the vent line that come from the small pv cover on riders right routed up near the frame head tube. the left side cover vent line runs down to hte bash plate and is zipped tied to the frame rail as per factory. I seem to get water in my tranny fluid after wet rides. At first I thought it might be the rad fluid. However I was checking it regularly and the fluid level was not really changing. last time i check the rad fluid it was only down I once at most. I have changed out the fluid and done several dry rides with out any milk showing up in the view window. I did a harescramble that was mostly dry except one straight with four or five decent but not monster puddles. end of race .. milk in the oil window. Did a pretty wet enduro today and .... milk in the window again. I checked the rad fluid level and it was down about 1/2 to maybe an ounce if that. that could have been me over working it in some of the mud tho. I suppose I could have a very small rad leak however ... I did ride 3x recently when it was bone dry and no milk. any guesses as to how water could get into the tranny fluid if the vent line is mounted up high. I did not drop the bike into any water so it could suck it up that vent line.

 

[eff]

I have the same issue and have not nailed down the source. I'm never low on coolant and it only happens on wet rides.

 

[GMP]

Run the vent line to the nipple in the frame for the gas cap vent (if you have an '05+) or the top of the airbox. Before doing this, I had occasionall milky gear oil after a wet ride and good bath, even with the opening of the tube routed down. If its routed with the opening up, then its a sure thing to get water in there.

 

[clerky clerk]

It sounds as though the seal from the water pump through to the gear box is slightly leaking

 

[skid jackson]

Possible but I rode 3x when it was dry and no change in oil color ... one wet ride and ... gray tranny oil. I'll re-route the vent to the airbox and keep an eye on the rad fluid too. Slight leak at the water pump might explain the little bit of rad fluid missing tho.

 

[nhrider]

I had the same problem with my 200. The coolant level was fine but I did changed the seal and moved the vent line. No more problems.

 

[skid jackson]

So I ran the vent line back to the airbox. I went on what I would call a very wet ride w/fresh fluid. No real mud but lots of splashy 6 inch deep puddles. I get done and ..... milky tranny fluid. I check the rad fluid level and it hasn't changed. if it was a water pump seal or an o ring or gasket on the jug/head there should be fluid missing. Now What!!!

 

[GMP]

If you not loosing coolant, it has to be coming in somewhere. Any indications of trans oil leaks? Check the right side PV linkage cover and vent fitting on the cylinder, also vent line for cracks.

 

[gasgasman]

Could be leaking at the ight side power valve actuator cover, where it mates up with the clutch cover.
The gasket may be distorted.

Another possible leak could be at the counter shaft sprocket seal.

It only takes a couple teaspoons of water to make the trans fluid milky.
You may not notice that small amount as being a loss of coolant.

 

[vgstef]

vent line

Run the vent line to the nipple in the frame for the gas cap vent (if you have an '05+) or the top of the airbox. Before doing this, I had occasionall milky gear oil after a wet ride and good bath, even with the opening of the tube routed down. If its routed with the opening up, then its a sure thing to get water in there.

The vent line is the left or right side ? I see two line one goes down strait and the other go up and loop down . Should I modified both line ?

thank you

eric

 

[GMP]

No, just the line from the right side of the cylinder, top of PV chamber, which doubles as a trans vent. The other side is a PV drain and has no path to the trans.

 

[thenutt]

hi all, any pics of these lines youre on about changing, i not so long ago purchased a ec250,2002 model but not yet had this problem, some pics would be nice for future reference,







thanks

 

[skid jackson]

Well I changed the water pump seal this winter ... rode an indoor mx track about 2 wks ago and ..... milky tranny fluid. So the water is obviously coming from the inside the motor. Interestingly when I checked it after some riding it was nice an clean, but at the end of the ride it was milky. I probably only did about 20 laps though. checked the rad fluid level and it was just at the top of the core. It was halfway or more to the top of the radiator cap when I started. So my options are ...

i screwed up the water pump seal install and its still leaking there.

The head o rings or base gasket are leaking

What are the other possiblities??

right now I plan to pull the head and jug and take a look. Hopefully I'll find something obvious. I checked the torque on all the head and cylinder bolts and nothing loosened up.

What could you do wrong to screw up the water pump seal install?? I don't remember the install as being terribly difficult or eventful?

 

[2 strokes 4 life]

Just in my experiance I have found that if you have a leaking head O-ring you will have white smoke from the exhaust pipe or it leaking down the cylinder if it was the outter O-ring.

There could just be water still trapt in the engine. I know it ushally takes about 3 or so times before it cleans out all the water completly from oil changes.

What was the level of coolant when cold?

 

[GMP]

Side cover gasket, two coolant passages pass through there to the pump.

 

[wiking]

Well I changed the water pump seal this winter ... rode an indoor mx track about 2 wks ago and ..... milky tranny fluid. So the water is obviously coming from the inside the motor. Interestingly when I checked it after some riding it was nice an clean, but at the end of the ride it was milky. I probably only did about 20 laps though. checked the rad fluid level and it was just at the top of the core. It was halfway or more to the top of the radiator cap when I started. So my options are ...

i screwed up the water pump seal install and its still leaking there.

The head o rings or base gasket are leaking

What are the other possiblities??

right now I plan to pull the head and jug and take a look. Hopefully I'll find something obvious. I checked the torque on all the head and cylinder bolts and nothing loosened up.

What could you do wrong to screw up the water pump seal install?? I don't remember the install as being terribly difficult or eventful?

I am following this thread, as I have the exact same problem on my GG EC 300, 2008. After a complete dry 4 hour enduro race my red tranny oil has turned into pink = water.

BTW do you guys have the left vent hose cut open? It was delivered from factory zip tied, but I read somewhere that this is not supposed to be like that.

 

[eff]

I found the answer to my problem.

Just before the Classic this weekend I tightened the breather nipple on the right power valve cavity and the nipple on the left power valve cavity. After the end of the ride Sat. my oil still looked great.

That is the only thing I did since my last ride, which ended up with water in the oil.

I recommend that you check these to make sure that they didn't loosen up.

 

[thenutt]

would it be getting in when you jetwash your bike, ~{ THROUGH THE AIR BOX OR SOMEWHERE}

 

[skid jackson]

I'm still having issues ...I did the same ride eff did and rode both days. I'll check those breather tubes but I know hte right side was tight because I pulled the head last week to check the orings which were fine. I measured the rad fluid height saturday night and put in fresh rottella t. i rode 105 miles sunday and the oil looked milky but the rad fluid height was the same. I'm starting to wonder if maybe the rottella t changes to a gray color instead of black?? I'll check the left side vent tube but ... there was no water on that indoor mx track i rode back in march. still not out of the woods yet ...

 

[Rick]

Just a thought, since it sounds like you have covered all bases. Have the tranny oil tested for water? Not sure what the cost would be, then you will know for sure.