engine smoke>

[Sknight579]

ok, my engine is smoking, it's that tube that comes off the engine, where the oil is, and goes down, it shoots out blueish smoke alot, and it's alittle embarrasing. so is there some way I can keep that from happening, or anyone know whats worng with it.

oh ya, my cars a 1965 coupe, automatic, with a 289 V8, it's got Mobil one as the oil, can;t remember what the numbers on it are, or mabee it was Rotella T, I can't remember for sure. I'll tell ya for sure later, thanks for any help you can give me.

Travis

[mustangman65_79]

Ok, if it's your dipstick tube that the smokes coming out of, sounds like your getting blowby through your piston rings. Which sounds like a rebuild. If it's through your oil filler tube, then your valves are having blowby. Which would be a head rebuild.

Anyone else have any ideas?

[Sknight579]

it's not the dipstick, its a tube that comes off of the engine and goes down the ends right under the engine block.

thanks for the suggestion

[mustangII460]

From a valve cover?

[71grande]

Possibly some freaky wierd type of crankcse breather tube?

I would start by checking the compression on the cylinders. sounds like you are getting blowby from SOMETHING.

Mike

[red]

Is it an extra tube out of the exhaust manifold? If it is, it is likely for emissions and you can likely just plug it.

[mustangman65_79]

That sounds like a good idea, I don't think it's his auto tranny fluid dipstick.

U need to trace the tude, see where it goes.

[Gearhead999]

Sounds like the road draft tube. Which is the crankcase breather tube.

That's what cars had before PCV.

If it is smoking a lot out of there, you have "mucho" blow by. Which isn't good.

Usually means at the least a rebuild, bad rings. Or worse a cracked or broken piston.

[mustangman65_79]

Originally posted by Gearhead999
Sounds like the road draft tube. Which is the crankcase breather tube.

That's what cars had before PCV.

If it is smoking a lot out of there, you have "mucho" blow by. Which isn't good.

Usually means at the least a rebuild, bad rings. Or worse a cracked or broken piston.

Hey, tell me more about this please. I've never seen one before.

[Gearhead999]

Well.........darn near every vehicle had a road draft tube for crankcase evacuation.

You have to remember that when the piston goes up it makes compression. Well, when it goes down it displaces air and volume in the crankcase. This positive pressure and fumes have to go some where. So they had a tube that vented it to the outside. Some engines had a tube from the valve cover and others had the tube from the intake manifold. This vented the crankcase.

Then the PCV came out, which vented the pressure/fumes to the base of the carb.

Hope, that explains it for you.

[mustangman65_79]

Hu, never seen one, or heard about it, but do u think a '65 Mustang289 would have one?!? I've never seen one on a mustang b/f

[Sknight579]

urrggg, I dunno, lemme get some pics real quick, mabe I can get the camera to work today

[Jeff65]

Originally posted by mustangman65_79
Hey, tell me more about this please. I've never seen one before.

The tube is about 3/4" in diameter and runs from the right rear valve cover, over the right side of the engine and ends down near the bottom of the starter. It is a simple tube with no restrictors, valves or anything else.

Crankcases always need ventilation because some gases always escape by the rings. In the olden days engines simply had air inlet vent on the left front valve cover (it was part of the oil filler cap). Air circulated into the engine from crankshaft rotation then out the tube on the right rear valve cover and to the atmosphere.

Positive Crankcase Ventilation eliminated dumping the gases directly under the car and to the atmosphere. The PCV valve replaces the tube and the output of the PCV valve is fed to the base of the carburetor. Gases are inserted into the engine and are burned along with the fuel during combustion. In this way, crankcase gases are converted to hydrocarbons more environmentally friendly. In the beginning the input breather cap was open. This system is called an "open" pcv system. It is possible for gases to escape the crankcase through an open breather to the atmosphere so later breathers have a nipple with tube and the tube goes over to the air cleaner or carburetor. This is called a "closed" pcv system. It insures all crankcase gases are burned in the engine.

[Rev]

Road draft tubes were angled in such a way that when the car was moving, a low pressure was created at the end that actually "sucked" the vapors from the crank case. If there is a lot of blowby, then a positive pressure resulted in the crank case and the road draft tube would belch smoke even if the car was idling and sitting still.

BTW, Ford must have introduced the PCV system on the 289 in '66, because mine came with the PCV.

Rev

[Jeff65]

Originally posted by Rev
BTW, Ford must have introduced the PCV system on the 289 in '66, because mine came with the PCV.

Rev

'65...only '64.5 had draft tubes AFAIK.

[Rev]

So the road draft tube/PCV is another difference between the 64 1/2 (early '65) and the later '65's like the generator/alternator or the Falcon/Mustang speedometers? I'm just asking to gain info on this, not questioning the fact.

Rev

[Sknight579]

can't get the camera to work. My '65 has the draft tube, but it smokes when it is Ideling, or just sittin there, so what do I do, Rebuild the engine, or just a small part or..........

thanks, travis

[Jeff65]

Originally posted by Sknight579
can't get the camera to work. My '65 has the draft tube, but it smokes when it is Ideling, or just sittin there, so what do I do, Rebuild the engine, or just a small part or..........

thanks, travis

Once it starts to chuff, there's really no quick fix. You could simply overhaul it, hone cylinders and put in a new set of rings but that leaves all the other stuff undone. Within a year or so, you'll be digging into it again for valve guides or seals, bearings, rear main seal, timing chain, etc. The best choice is to replace it with a new crate engine, then next best to rebuild it, next best to overhaul it, and finally to sell it. Most folks find that rebuilding is the most cost effective alternative provided the engine core is solid for rebuilding. <= has not been rebuilt several previous times and is not at rebuild specification limits. if you find yourself at this point buy a new block or crate engine.

[Sknight579]

ugggg, my dad said, It's nothing, don;t worry about it. I parked it out at the warehouse, and I'm driving my crappy mercury around

[mustangman65_79]

I say, drive it till it dies, then rebuild the motor-