I just finished installing a Wiseco piston .020 over (GREAT COMPRESSION NOW) and I cannot tell if the oil pump is injecting oil. Normally the machine has a small amount of blue smoke in the exhaust but the exhaust looks very clear now. I am running a 100:1 oil mixture inside the tank to give additional lubrication for break-in (in addition to the oil-injection) so it really seams like it would be smoking even more than usual. I have run the engine for only 5 minutes so I have not hurt anything YET.
Before the piston installation the oil injection system was working perfectly.
Does it take a few minutes to get the oil up through the oil injection line since it was disconnected and may have air in the line?
Has anyone else had this ?
Help is appreciated.

 

Remove the oil line from the cylinder . Put a bolt in the hole to avoid an air leak . Make sure you have premix in the machine before proceeding . Remove pump cover and start the quad and let it idle . Manualy open the cable wheel on the pump . Observe the removed line. You should see oil oozing from the fitting ,if you do , things are probably ok . Double check your cable setting on the pump and replace the cover , reattach the oil line and top off the oil tank and keep a close eye on it to make sure it is consuming oil . Most likely , it is working .

 

I will give that a try. Does the new (higher compression piston) combust the fuel better which leaves less unburned oil (less blue somke)?

 

WOOPS .
I thought you had 400 . The pump is uncovered in the rear of the motor on you machine . No bolt on fitting either , just remove the hose from the press in fitting . The procedure is the same though .

The wiseco piston is the factory compression . It just feels higher because it is fresh and tight

 

OK thanks rick I will give it a try... will have to wait until tomarrow evening...got to give the little one a bath and to bed... thanks again.

 

This question to Rick Ritter doesn't go in this forum, but I'll ask anyway. Rick, what do you think about the injection system? Is it problem prone? I just bought a 2001 Xplorer 400, and am thinking about blocking it off and using premix. At 40:1, will the machine load up quicker than with the injection? What are the less than obvious pros and cons associated with either method of lubrication. The reason I ask you is that you seem to be very knowledgable on my engine, and I thank you in advance.

Waylan

 

Unless your quad is fairly well modified, I see no problem with your 400's oil injection system , it is adequate and reliable.

Where one can have problems is on a modified machine, modified engines have a larger appetite for fuel . The increased amount of raw gasoline can act as a *degreaser* to the engine , the fuel may actaully may wash oil off , leaving the piston to work in a bath of less than adaquate oil .

When premixing , the fuel is always a lubricant , the oil is already there .

On your stocker , a small amount of oil in the fuel would probably be all the added protection you would need .(While still using oil pump)

Oil pump failures are rare , the only one of Polaris models that had any failures in alarming numbers were a few 300cc models . The oil pumps are fine on most others . It is not pump failure I fear , but the failure of the pump (in good working order) to adequatly oil a modified engine.