Working on the 66 Skylark I picked up. Got it running, and once it warms up it smokes-ALOT! No blow by when I pull the breather or the pcv valve though. Runs good, has good power. It has been sitting for about 8 years. Any thoughts or ideas? I have a complete parts car that came with it, but it also smokes heavily! Going to try an oil change tomorrow and some Lucas additive. Oil is very black and filter looks like it is from 66.
Get the oil change done!!! If it's 8 years old you don't want to run that engine! And remember, no Fram...
Smoke is grayish. I was running it off of a five gallon can at first full of fresh gas. Stock tank is hooked back up with some fresh gas and Lucas.
Hopefully you are lucky and someone put a bunch of oil in the cylinders before they parked it to sit. Like others say, do the oil change and try it again.
If there is sludge blocking the oil return holes in the head, oil will sit up top under the valve covers and get sucked down the intake guides, and the engine will smoke, especially at idle. If the car has been sitting for awhile, the valve seals may be dried out also.
Don't worry, I have been an anti-Fram guy for a long time! I was very disappointed when the parts store I work for recently started carrying fram after years of only carrying Wix. Got the oil changed this morning and added a quart of Lucas. Drove it down the road and back. Smoke is better, but definetely still there.
Im with Larry, I would suspect valve stem seals, either intake or exhaust. Does the 300 even use seals on the exhaust valves?
Just a quick question since we are talking about an oil change and such... I just got a '66 with a 300 in it 2 weeks ago. I would like to change my oil but cannot decide on what to use (weight, brand, etc), any help would be appreciated!
What carb do you have on your car? Rochester or carter? I just rebuilt my 2 barrel rochester and I will be putting it on this morning. The bottom base of my carb has some corrosion so I am using some sealer with the base gasket. How is the choke set-up? If that is not hooked up right you might have some smoke coming from the car. Good Luck
my 300 is also smoking after a carb intake swap. and my choke is not hooked up correctly due to stove pipe is rusted through at exhaust manifold. how will that cause smoke from exhaust? i'm not trying to be a smart a$$ i really want to fix car and get it out of the garage this year. i've been thinking i have a valve seal leak, which would require machining on my car. if it could be something as simple as a choke issue that would be great. mark
Any name-brand 10w-30 will be fine. Add some ZDDP additive to ensure the cam and lifters will receive the proper lube that the new oils don't contain. If the choke is closed, the fuel/air mixture will be rich and result in black exhaust smoke. White smoke is an indication of water getting in there, blue smoke is excessive oil. Since it's been sitting so long, the piston rings may be gunked up, leaving too much oil on the cylinder walls. It may begin to clear up the more it is run.
Put ZDDP into the search function of this board or even Google. Then make a bag of popcorn and start reading.
Mark, the "stove pipe" from the exhaust manifold has nothing to do with the choke, its job is to supply warm air to the carb under cold conditions. The choke is a seperate deal.
Larry, I should have taken your advice and started the popcorn popping.... nothing like a hundred different opinions about oil additives to add some more drama to your day......ou: I guess I'll be spending more time reading the back of the oil cans at Walmart now. :spank:
The early cars do use a metal line from the exhaust manifold to supply warm air to the choke. It's a 3/16" metal line. You're probably thinking of the 3" id flexible hose used on the later cars.... To replace the choke tube, just buy some steel brake line from the auto parts store.
Thanks Walt for the explanation of what can happen with the choke :beers2: :beers2: I got the carb back on Arties old 66 car yesterday. Looks like I have a little bit of smoke coming from the passenger side also. Artie a while back had mentioned to me to use Shell Rotella T Diesel Oil and it will not smoke or smoke as bad. I did try it in my Nova wagon and it did help. I will run the car some more and change the oil and try the Rotella.
:error: I got thinking about it after I wrote this & realized that 66 was a few years before the exhaust manifold "stove & stove pipe" to warm intake air.
