And the dog had been running so good

[Coolbreeze]

Pull the plug out of the the bottom of the motor. I've got a bike right now that something lodged in the scavenge side of the oil pump. Oil was pumping in the motor but not returning to the oil tank. Oil came out of the exhaust along with a shit load of white smoke.

 

[BadBrad]

Pull the plug out of the the bottom of the motor. I've got a bike right now that something lodged in the scavenge side of the oil pump. Oil was pumping in the motor but not returning to the oil tank. Oil came out of the exhaust along with a shit load of white smoke.

Dammit man. How the hell did you figure that out? And what did it end up being that pluged up your scavenge side of your pump? That would lead me to believe something broke like a valve guide. I learned early on that a piece of valve guide can travel through your motor and end up in your oil tank....huh John? Some lessons are harder for me to learn than others, and that was definitely one of them. But contrary to Rocky's belief, I am capable of learning.

 

[Relic]

Coolbreeze may be on to something. Since you said the bike was very low on oil, it may be in the case.

 

[BadBrad]

It's worth a try. Earlier, I did take an extesion rod/magnet and swirled it around in the oil tank just to see if there might be something in there that may have broken loose or to check for metal shives. Nothing!

 

[Little-Boo]

Carlos, Using that technique, both plugs out, fuel off, throttle wide open and test one cylinder at a time, both cylinders registered 185psi. Is this the method used when someone asks you to check your cylinder pressure? I've always pulled one plug, no throttle and turn the starter.

That is it Brad, seems like the rings are good. Those are the numbers you want to see on a modified engine.

It is possible that an exhaust valve seal is causing your problems. Especially if you made a right turn on to your drive way, oil may have just ran right down the exhaust valve and out the pipes. Could be that an exhaust valve oil seal is somewhat plugging up the return whole on the head and more oil is staying in the head causing it to puke when you make a right turn. Good Luck,

Carlos

 

[BadBrad]

Are you psychic Carlos? Yes, I did make a right turn into my driveway, but as I was downshifting and slowing down prior to the turn is when the motor sounded a little on the quiet side. That's why I said it sounded like it lost compression. Then, when I did make that turn I could tell it was definitley something wrong and killed the motor and coasted down the drive to the house. I guess anything is possible. I think I'm going to try the "don't do shit" and just drive it first to see if it happens again with a full tank of oil. If it does, I'll have to take a peek into the rocker boxes an check my valve guides and seals. I really do appreciate everyone's input today. It sure makes it easier with a dozen brains working together. Definitely learned some new things today to. I'll keep you posted on the "do nothing" approach. It'll either work or I should find out something soon. Good night all.

 

[john sachs]

Brad,
It's possible that the ball in the oil pump stuck open, and let your oil tank drain into the sump. If you can get the plug out of the case bottom, and a lot of oil comes out, that's prolly your problem. If your oil tank gets hot when you run/ride the bike, the scavange side of the pump is working.
Run motor for 30 seconds, and then check your oil level.Do this before adding any oil. If the tank fills, then you had too much oil in the system.
John

 

[BadBrad]

Brad,
It's possible that the ball in the oil pump stuck open, and let your oil tank drain into the sump. If you can get the plug out of the case bottom, and a lot of oil comes out, that's prolly your problem. If your oil tank gets hot when you run/ride the bike, the scavange side of the pump is working.
Run motor for 30 seconds, and then check your oil level.Do this before adding any oil. If the tank fills, then you had too much oil in the system.
John

I'll check into it when I get home this afternoon. That was kinda opposite of what I was thinking. If I had too little oil in the tank, could the pump suck air and cause too much pressure in the head, forcing the oil in the top of the head past the valves? Also, how much do you consider to be "a lot" of oil in the sump? Also, if the ball did stick open in the pump, but later un-stuck, would you change the pump out anyway?

 

[BigDogBro1]

I think the normal accumulation of oil in the sump should be around 4 to 6 ounces. That's about what I've seen.

 

[RRRUFF]

 

[Relic]

As BigDogBro1 said (roughly 6 Ozs in the case).

Wife's Chop sumped and there was over a quart in there.

Also, no need to look for an oil pump just yet. If you find the excess oil in the case, first thing to do is pull the ball and spring to check for trash (check the seat & ball while you have it out).

Hope that's all that's wrong with your bike (easy / cheep fix).

 

[BadBrad]

Thanks guys! I'll check it this evening when I get home and let you know what I found. Can't say that I've ever read about this issue before. One last question....for now. Where exactly will I find the bottom drain plug? I know...on the bottom. Sometimes it's easier to ask before I start looking. Time is money!

 

[Relic]

Bottom center of the case / motor. It will be an allen head plug.

When re-installing, don't overtighten (believe someone posted about 7-8 Ft pounds / don't have my manual here at work). Also, it will have an O-ring on it (just put a dab of thread seal or high temp silicone on the threads just to be sure).

 

[BadBrad]

Good God Almighty. Has anyone read the procedure for oil pump removal and installation? There's a lot more to it than just a few bolts, clean'er up and put it back on. I searched for a "how to", but no such luck. I have the manual and there are no pics. All these years of looking at porn have me so damn picture oriented. Does anyone happen to have an exploited view of the oil pump, scavange pump and gears? The manual talks about lining up the gears, kinda like lining up the marks for installing a cam. Any first hand experience, pictures and/or shortcuts would be greatly appreciated. Also, will I need to order new gaskets and a snap ring?

 

[john sachs]

Good God Almighty. Has anyone read the procedure for oil pump removal and installation? There's a lot more to it than just a few bolts, clean'er up and put it back on. I searched for a "how to", but no such luck. I have the manual and there are no pics. All these years of looking at porn have me so damn picture oriented. Does anyone happen to have an exploited view of the oil pump, scavange pump and gears? The manual talks about lining up the gears, kinda like lining up the marks for installing a cam. Any first hand experience, pictures and/or shortcuts would be greatly appreciated. Also, will I need to order new gaskets and a snap ring?

Don't start messing with the pump yet. FIND THE PROBLEM FIRST. :bang:

 

[BadBrad]

Roger that. Just got home. Have a couple of honey-do's first, then I'll check and see how much oil the sump is holding.

 

[BadBrad]

Well, I haven't found the root cause, but I've found a symptom.When I pulled the bottom case plug, I filled a 41 oz Parkay Butter tub slam to the brim. I'll wait and see if anyone has a schematic and get a little more feedback before I tear into the pump. I still have questions about how the gears in the pump line up. I'm guessing they have a mark similar to the cam that lines up. I held a bright flash light to the oil as it drained and definitely saw some metallic glitter. No chunks and may be from normal wear and tear but maybe not.

 

[Relic]

The pump, most likely, doesn't have to come off the bike.

Next step is to check the check valve ball in the pump. It is the "Straight Blade Screwdiver" looking plug on top of the oil pump. There are 2 of these type plugs. You want the inner one.

Drain the oil tank, pull the plug out of the pump (has a spring under the plug), then use a small magnet to pull the ball out. See if there is trash down in the hole (seat area).

 

[erldawg]

The pump, most likely, doesn't have to come off the bike.

Next step is to check the check valve ball in the pump. It is the "Straight Blade Screwdiver" looking plug on top of the oil pump. There are 2 of these type plugs. You want the inner one.

Drain the oil tank, pull the plug out of the pump (has a spring under the plug), then use a small magnet to pull the ball out. See if there is trash down in the hole (seat area).

A picture here would be worth a thousand words.....

 

[toodie]

"41 oz Parkay Butter tub" damn you might need to get your own check valve looked at :roll:

All kidding aside hope you find the issue and get it corrected.