I took my challenger to the track monday for the first time since i bought it a few weeks ago and it is pushing a bit of smoke out of the exhaust on one bank at high rpm. It has good oil pressure and sounds fine, makes pretty good power, unfortunately i haven't got a lot of time to mess with it at the moment, so wondered if there's anything i can stick in there to stop it smoking untill i get time to pull it out. I intend to do a comp test in the next week or so just to verify the problem or not ?
Mick

Need a lot more info, could be an intake leak or other issue(s), need more info

In a word, no.

And a compression test won't tell you what you need to know. I suggest a leak down test.

However, even that wouldn't tell you if you have a valve stem seal leaking.

I thought it was valve stem seals on decel and rings on accel ?
I have three other cars, one i'm in the middle of doing, my Dart is next and the challenger will have to come after that.

Sadly there isn't a miracle solution that will fix leaky rings.

If you don't find an intake gasket leaking then the only thing you can do is rering it ...

I'm not trying to cure it, i'm trying to reduce it, till i get round to fixing it in the winter. If it was intake surely it would be white smoke ?

Well, you didn't tell us what color the smoke is.

If it's dark, it's fuel. But only blowing smoke out of one side doesn't indicate fuel as intake manifolds are either single plane, mostly without divider plates, or dual plane and they are nearly without exception, one side of the carb feeds two on right and two on left.

If it's bluish-gray and smells like oil, it's oil. It could be one broken ring, which is more likely than the rings on only one side going bad. It could also be an intake manifold leak, in which case you should be able to tell which one is leaking by looking at spark plugs. Actually either one of those would foul one spark plug.

If it's pure white it's coolant and you have a head gasket problem. I've had experience with unknowingly running an engine with a warped head for miles , middle of the night, and the burnt antifreeze seized the pistons. While I saved enough money to overhaul the engine, the acid from the burnt antifreeze attacked the cylinder walls and made a myriad of pits, a little over 0.010" deep.

You will get better answers from investigation and logic than you will by shotgunning tests at the engine. In most cases the engine'll tell you the answer.

JohnRR is mostly right, most of the scenarios I've outlined above will not be fixed by a bottle or two of Wynn's Motor Honey.

R.

I didn't see the smoke as it was going down the strip at the time, someone suggested it was oil smoke but that could be a guess and it was only doing it at high rpm, car runs perfect, took it out yesterday but didn't give it any rpm because the place and the weather didn't allow that.
Going back to the track with it in a couple of weeks, then taking my Dart out 3 wks after that if i get the glass doors mounted in time.
Mick

What kind of engine?

440, hyd cam, ported 906 heads, victor int, 850 holley.

What color is the smoke ?

Whether oil gets into the cylinders via the rings , valve seals or intake gasket it's all going to be blue. If you have white smoke that is water and it's coming from a crack in the head, the block, or the head gasket. There is no water in the intake of a big block mopar ... but you know that ...

If it was water, surely it would be smoking all the time, it's only doing it under hard acceleration. I'm not sure what colour as i was running in a bracket but someone i know suggested it was oil smoke.

Are the spark plugs clean? Have you tried Smoke Fix type engine oil additives? Mostly snake oil, but it might reduce oil burning a bit.

You could replace your valve seals with Vitton type.

I have a Jeep CJ 5 with Factory AMC 304 V8. Had the heads rebuilt at a local shop. A year later the engine smoked quite a bit. Initially thought it need a shortblock rebuild. Rolled the dice and replaced the valve stem seals with Vitton type, and ALL the smoking went away. I was amazed.

I used an on-head type valve spring compressor and compressed air with a fitting to hold the valves shut. It was like a magic cure. It is still a clean burning engine now five years later.

Do you have a Pan Evac? Sort of a poor mans crankcase vacuum pump. It can reduce blow-by and improve ring sealing by reducing internal crankcase pressure. It is fairly cheap to do. Just weld a 1/2-inch pipe into the header collector, thread on an exhaust check valve, connect hose from check valve to a breather fitting in the valve cover. I currently have Pan Evacs on my '79 Jeep and my '71 Charger.

Hummmm....

DC any idea how much vac it is generating? I want to do this myself.

Sorry i didn't reply DC, there's an 8 hr difference between us and i've been busy working today. I've tried nothing yet but i may have the exhaust evac parts in the garage.
Here's a pic of one of the plugs, oil on the threads but dry and biscuit brown everywhere else.
Mick

I put one on my 360. Mine doesn`t generate much vac but it is enough to keep oil from covering the intake and valve covers. It really depends on the exhaust and back pressure on how much vacuum you get. Also it depends on where you install it and the angle of the pipe.

Some interesting options there and a lot of info i didn't know.

I don't know if this would work for a high power engine, or if it would mess with cutting equipment when getting the block machined, but there is a new company selling a product certech gel. It's a ceramic gel that you add to engine oil. The technology has been around for awhile. It fills in and resurfaces metal where there is metal on metal friction. That's what they claim anyways. I have a stock 318 that has bad blowby. Chugs smoke out of valve cover. I'm not investing money in a rebuild, it's nothing special so I thought I'd give this stuff a try. I called the owner and since the company is new he gave me 20% off and will refund another $50 if I video the before and after.

I have no expectations of it actually working but we'll see. I'll post results. They also guarantee damage cost of any were to occur due to product. Haven't seen any complaints yet though.