So I was SeaFoaming my 12a today, and it started spewing oil out of my filler neck. I had an oil leak yesterday on the top of my motor while I was trying to clear up the motor by driving around the block, and thought that it was just my vent tube that had come undone. If i'm overpressurizing the oil sump and the oil is spewing out of the filler neck (high pressure spraying from under the cap), does that mean that my oil control rings are shot and the motor is dead?

 

to the top so it doesn't get lost on page 2....

 

wow, i dont even know how thats possible. the oil fill tube is not pressurized in any way, it just drains strait into the oil pan. the only thing i could even think of is a whole lot of blowby accompanied w/ too much oil ..at least enough to cover the hole that drains into the pan.

what is your oil pressure at idle and ~3k rpm?

 

it won't idle, and i don't have any help to look at the mechanical oil pressure gauge. I'm pretty sure that the motor is blown, because the compression is stupidly low.

 

You may have some severe blowby! That would mean blown oil control rings and compression is pushed into the oil...

 

that's what i figured. it's soaking with ATF to try and clean out the side seal and apex seal grooves.

 

Best of luck! Let us know how it turns out!

 

thanks

 

I have heard of people using seafoam to try and break up carbon from inside the engine. One thing in doing this is if you have worn oil control rings, the carbon holding them in place can be washed out by the seafoam causing low oil pressure and a higher consumption, and burning of oil.

 

that's one thing that i'm afraid may have happened, so i'm soaking it in ATF a a last resort trying to see if I can unstick the side/apex/corner seals.

 

ATF? You may have screwed yourself. It, too, can loosen the carbon around the oil o-rings/seals and cause greater consumption and smoking. I wish the ATF myth would die already.

 

well it's a last-ditch effort to unstick the apex and side seals. I went on what I read in vipernicus's "how to decarbonize an engine" thread, and used ATF. If this doesn't work, then i'm going to use MMO and some SeaFoam deep clean aerosol to clean out my other motor.

 

Dumb question. When the oil is spewing out the filler neck, did you check to see if it was over filled? With the flooding carb, followed by all the attempts to decarbon the engine, you may have filled the oil pan with gas and other chemicals.
I think your carb is still the root of all your issues, in the beggining. No telling what all is going on, now.

 

Try running the crankcase vents to the the intake and see if it wont vent a little better. Also, put in a quart of lucas heavy duty oil stabilizer to swell that oil control ring back up.

 

Yeah.... ATF is a last ditch effort to unstick stuck apex seals and get a motor turning... but one of the side effects that I've heard is that any rubber seals such as your oil o-rings tend to swell...

Either way, if your engine is dead and needs a rebuild either way, I dont' see what you can lose by trying.

Jon

 

Jon, do you think we should update that information in the FAQ section? I think everyone pretty much agrees that the ATF is not a good idea. There are now better solutions out there, such as water or my personal preference Seafoam.

Since we tend to direct all of the noobs to the FAQ section, I think we should at least make sure that the information in there is still correct and relevant...

 

i'll purge the ATF when I get home and clean it out with some MMO. The oil is not over-filled, I just changed it (I have ~5 miles on it from running around my neighborhood trying to sort out issues), but it was black and murky when it spewed out, leading me to believe that I have oil control ring issues.

 

That's what i'm thinking. I have a 68k mile motor sitting in my grandpa's barn that turns with a ratchet on the front pulley with very little effort. Unfortunately, I only have this weekend to swap the motor, and then next Sunday I drive north to school.

 

I did the H20 treatment, then hit it with SeaFoam, and while SeaFoam-ing the engine, it died. compression tested immiediately after, and got 30/30/30 on housing 1, and 25/25/45 on housing 2

 

I'm going to try and fire it tonight to burn off all the ATF. It'll have to be a bump start rolling down the hill by my parents house.