My 00 yz125 was dripping coolant from the weep hole so i went out and bought the pump gasket and seal but i am stuck at the impeller wheel - do i need to take the entire casing off to get the impeller wheel off??? tried putting the bike in gear and holding the tire with no success...
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: 2000 yz125 - Water pump seal change
The two seals in the diagram below are separated by the casing they fit into. The impeller is threaded to screw onto the impeller shaft. I think you already knew that by your "holding the tire" note. The center casing does not get split. The right casing does remove then a wrench is used on the shaft as the impeller unscrews counter clockwise. It is risky to "Lock the wheel" because the gear on the impeller is very thin and can break.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
i had this same problem with a 2004 dodge stratus. turned out to be mixed coolants. check to make sure that the thermostat is opening and closing properly. you can do this by dropping the thermostat into boiling water. if it opens its not that. could also be the water pump, to check this look for a slow drip of coolant coming from the water pump. water pump has what is called a weep hole and when it goes bad coolant will drip from the weep hole.
No, only a leaking head gasket or a popped water pump oil seal will allow anti freeze into your oil. I would look for oil or antifreeze out of the weep hole under the water pump at the front of the engine. If the weep hole has become plugged wwith dirt or debris, then the anti freeze would pass into the motor oil. If this is the case get your water pump from Honda and purchase the water pump gasket set from K&L supply, it will have all the gaskets, seals, and washers to replace the water pump. If you suspect the head gaskets , remove the spark plugs and look for signs of antifreeze in the combustion chamber. It is not definitive but it may give a clue with out just going to the expense of changing the head gaskets out.
Most Yamaha water pumps have a "weep hole" on the bottom of the water pump housiing.
Basically your water pump shaft has a coolant seal and an oil seal where it is driven...the weep hole drains away any leakage between the cooalnt and oil seals so cross contamination does not occur.
You probably should look at rebullding the pump. Don't try plugging off the weephole to stop the loss...it will contaminate the oil system.
If the oil plug bolt is leaking you need a new aluminum sealing washer. There are no oil weep holes in the front of the motor. Is it the weep hole under the water pump? You probably have a bad water pump seal or a bad oil seal on the water pump shaft. Buy a new water pump and the K&L water pump gasket kit. The K&L gasket kit comes with all the gaskets, seals, and washers necessary to do the water pump replacement for a fraction of the cost of the OEM Honda individual gaskets, seals, and washers.
The pump does have a weep hole in it. If a seal in the pump fails coolant will come out of the weep hole. Looks like you may have a bad water pump seal, but check gaskets, intake manifold and hoses as these can leak in this area as well. So determine where the coolant is coming from before investing in a new waterpump.
If you can see this water dripping from the lower crankshaft pulley, and you are filling water, then this water pump probably leaks from the weep hole, the weep hole is designed in all water pumps to tell you that the water seal has failed. The water pump is timing belt driven, to change it will require removal and installation of the timing belt, for a procedure of this, go to my profile page and look at my tips and tricks for timing belt replacement 1.9L. While the timing belt is removed, the water pump has two hose connections and four blots that hold it in place, the four bolts are the easy part, the two hose connections can be difficult. Make sure to use a gasket sealer when installing a new pump. Hope this helps, let me know.
there are two different seals on the water pump. the oil seal and the mechanical seal. the oil seal helps seal out the oil from the trans case. the mechanical seal helps seal the coolant from going into the trans case, and vise versa.
the weep hole is there to help diagnose if either seal is faulting. so if coolant is leaking from the weep hole. the mechanical seal is faulting or if the oil seal is leaking oil will drip from the weep hole.
hope this is of some help. thank you.