Marvel Oil Shooting out of Plug Holes Upon Dry Start

[Bingster]

I poured Marvel Mystery Oil down the plug holes of a flat head six to keep the cylinders lubed over time. On first turn-over the stuff shot out of the plug holes when the engine turned. Good sign. I guess? But it made a mess.  I was thinking of making a suction tool and taping it to a vac hose.

 

Would that work or is there a better way?

[Los_Control]

No idea what your procedure was.

I would pour in the mmo & let it sit for days or possibly a couple weeks, in my case.

Give it time to soak down around the rings where it is really needed. Then it will leak down into the oil pan.

 

Put the plugs back in & the oil will be forced out the exhaust.  ..... Too late to avoid this, You already started the process. 

If oil is coming out the plug hole, probably just as much went out the exhaust already ..... yes it will smoke when you start it, but will burn off.

[Bingster]

Thanks. Actually, MMM oil as well as some some engine oil had been poured down to the cylinders at intervals about four years ago.  I stopped due to time. So if I just put the plugs in and fire it up, it should be okay?  Will it foul the new plugs? I don't mind, if it will solve my problem. Car has been sitting for a few years under cover in a building. We last turned the engine over without plugs about two years ago or so.

[Los_Control]

Pushing the oil out the plug holes is a good sign.

Probably means the rings are kinda sealing & the thin oil is not leaking past the rings .... Thats fine.

Just the idea that the engine has had oil added to the cylinders, it is rotating fine .... probably time to check for spark & start it up.

 

Probably will not foul your plugs, did not foul mine ... it is possible though.

The engine will smoke a lot for some time. Till the engine heats up & burns off all the excess oil.

 

Another issue is excess oil pushed into the muffler will smoke for a long time. A long drive may be needed to get the exhaust hot enough to burn off the oil.

 

You can tell by looking at what comes out of your down draft tube. Smoke out the tube is generally oil that is leaking past the rings being burned.

If that is fairly clean & oil smoke out the tail pipe, it is oil trapped in the exhaust.

[Bingster]

Thanks for the info. Okay, here goes. Where is the downdraft tube?

[Los_Control]

Just a generic photo, think it is a Ford engine .... Mopar have them in nearly the same location.

 

The down draft tube was the original version of a PCV.  

All it did was remove the exhaust gasses from your engine & point them under your floor boards. ..... If you had holes in your floor, the gasses would be sucked up into the cabin area.

 

We improved since then with a pcv, but your car would still have the tube & can see whats coming out of it.

[Bingster]

Yeah, now I remember.  I've been out of the hobby for a time and I've got to get acclimated again. I was trying to sell the car 'cause we needed extra $$, but it's given me some of the best fun I've had. I always thought how sad it was when guys on the board had to sell their cars.  But now I can see why. Life changes.  A '47 DeSoto won't be of much use to me in the next life.  They've probably gone electric anyway.

 

[Bryan G]

If you ever wanted to make a James Bond automatic smoke-screen, an MMO injector into the exhaust would do the trick! It will amaze and astound just how much it will smoke from that little bit. Don't fret, though,  it WILL stop. The first good drive will usually do it. 

 

Wishing you many happy miles ahead, with or without the DeSoto. If it's time to sell the car, I hope it finds another good home. 

[Bingster]

Thanks Bryan for the kind sentiments. I'm going to slowly work on the car so that even if I do sell it,

"engine runs" sounds better than "engine turns."