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She’s Too Young To Be Smoking!

nvrenuf

nvrenuf

Holy crap, it's running!
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Got a funky new smoking issue with my motor.

A few weeks ago the Blazer stayed outside for a week under a tarp. It was running fine but I was working on my fuel pressure regulator so no air cleaner, just a clothe type fender cover over the carb.

Fast forward a week, my friends Jeep finally left my shop so I went to move the Blazer back inside. Naturally, I forgot about the carb and tried to crank it. Of course, it wouldn’t start and I cranked on it a few times for about a minute. It did try to run, just kind of shuttered for 5-10 seconds and shut off.

At this point I remembered the cover and took it off. It was just like I left it before, draped over the carb and NOT sucked down tight on it. After removing the cover it cranked right up, high idle with choke and settled down when I bumped the pedal.

The problem is it’s smoking heavy now. Not at first when cranked, after it’s run 30 sec or so it starts. My first thought was I fouled the plugs but the smoke looks blue.

Any ideas what I might have done??

I’ll post a quick video in just a moment.
 

I don’t think it smoked at all before except for maybe a little fat carb smoke at idle.

Fyi, quadrajet, stock tbi pump, new regulator set at 6psi. The carb builder suggests 5.5 psi but I don’t think .5 would do this.

@83ChevyK5Blazer @chris85 Did y’all notice this kind of smoke at S.L. ?
 
That’s ok. Confirmation about the smoke helps a lot, a was afraid I was in denial. lol

I’ve had it up to temp twice in the yard but haven’t driven it down the road. Smoke was the same both times.
 
Maybe when you cranked it over the tarp did get sucked down over the carb and smothered it--that might create enough suction in the crankcase to pull oil past the vale seals and guides..
I noticed the puffs of smoke seem heavier during acceleration and especially when you let off the gas,that usually indicates oil being sucked past the valve guides and stem seals more than rings,which usually make it smoke more or less constantly..

Maybe the oil is a bit over filled ?..

Other things that can cause smoke is a bad vacuum brake booster,the brake fluid can get sucked out of the master cylinder a tiny bit at a time and when enough builds up in the booster it'll get sucked into the vacuum hose to the engine and be burned..usually will do that only after a cold start ..
A plugged up PVC valve hose or intake fitting can cause excess blow by also..not all PCV valves are the same either,using one not intended for the engine may cause excess oil consumption ..
 
I would think about taking it for an extended cruise and let it get fully warmed up. Maybe stuff isn't fully seated in yet. I would wonder if what your seeing would go away once the motor is broke in.
 
I would think the motor should be mostly broken in. The motor probably only has 200-300 road miles but it's been run quite a bit along with a couple of wheeling trips - one a month ago where it had a fair amount of run time (without actual miles). Some of the guys that were on the wheeling trip posted above and did not notice any smoke from the truck.

I can see the suction having drawn in oil through the stem seals, is there a product I can run through it that would clean out any residue that may be in the intake runners?
 
I've seen cars that had a blown engine replaced with a good used engine,that took a half hour or more to burn off all the oil the old engine pumped into the exhaust system more than once..it can take quite some time..

Probably anything you put in the intake like Seafoam or other top end cleaners will make even more smoke until it all gets burnt off..
A solvent like throttle body spray cleaner will work but a solvent can wash oil off the cylinders and rings too,or end up in the oil and thin it out..some have a top end lube in with the cleaner to prevent that..

It might be the oil got diluted by gas somehow,if the engine flooded or had a misfire problem,and is so thin it's passing by the rings..try lighting the oil on the dip stick with a lighter,if it lights right up with a whoof almost instantly it probably has gas in it..might be able to smell gas sniffing the oil or the oil filler opening..you'll want to change the oil immediately if it has gas in it..
 
Well if it's a head gasket it will be water with oil look like chocolate milk
 
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