Smokey business

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ahoppj

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Raleigh, NC
First Name
Aaron
Truck Year
1984
Truck Model
Chevrolet k10 silverado
Engine Size
350
Hello ladies and gents!

I had some trouble starting and idling with my truck.

I planned on changing spark plugs and wires as apart of the project schedule and went ahead.

Now!!! She starts perfect and runs like a Dream compared to before.

BUT!! now I’m getting a concerning amount of smoke out of the exhaust.

All the plugs had oil deposits and looked like they haven’t been changed in a long time or he let the oil leak go for longer then anyone should.

First thing that came to mind was if one of the plugs wasn’t working maybe there was build up and now that it has new plugs it’s just burning all that out???

I do have a cracked manifold I am getting replaced next week but.....

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Vbb199

B-rate Hillbilly Customs
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Salisbury NC
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Vince
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89, 79
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89 Suburban R1500, 79 C10
Engine Size
350, 502
Blowby on the pistons?
Is it all the cylinders? Or just a couple?

Couple be excessively leaky valve seals
 

ahoppj

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Aaron
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1984
Truck Model
Chevrolet k10 silverado
Engine Size
350
Blowby on the pistons?
Is it all the cylinders? Or just a couple?

Couple be excessively leaky valve seals
They looked like that plug for all of them
 

AuroraGirl

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Northern Wisconsin
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Taylor
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1978, 1980
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K10, K25
Engine Size
400(?), 350
i too, have plugs of spark.

rich fuel mixture, retarded timing, probably weaker spark, sat a long time with sludgy oil, so im expecting a few changes till its cleaner. and put new plugs in, fixed timing a bit.

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Ricko1966

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kansas
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Rick
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1975
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c20
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350
Is it the same or worse on a stop and restart or first start off the day.Valve seals the oil runs down the stem and puddles up so it's worse on start-up. Rings oil run the skirts and down the cylinder walls not puddling up.So no change on amount of smoke on startup.
 

AuroraGirl

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400(?), 350
my 2001 aurora never cared. valve seals were a dealer only option, it seemed.

no matter how car was driven, a certai time or 400 miles, 1 quart of motor oil.
 

gotyourgoat

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NRV Virginia
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gotyourgoat
Truck Year
1984
Truck Model
c10
Engine Size
smokin' 305
i too, have plugs of spark.

rich fuel mixture, retarded timing, probably weaker spark, sat a long time with sludgy oil, so im expecting a few changes till its cleaner. and put new plugs in, fixed timing a bit.

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Wah wah wah gimme a ******* break. You have spark plugs that are clean. Take a look at what the clean plugs I drive on look like.

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Can't seem to find the pics I had of actual fouled plugs. Badger me some and I might remember to take a pic when I'm out there scraping with a small screwdriver and a wire brush. ;)
 

Josh Helm

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Mooers New York
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josh
Truck Year
1982
Truck Model
K1500
Engine Size
5.7 vortec
Also check the drain ports in back of cylinder heads ... if there is build up could be over flooding the heads and filling up past the valve seals ... causeing extra pressure and there is leak by ... seen it
 

AuroraGirl

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Taylor
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K10, K25
Engine Size
400(?), 350
Wah wah wah gimme a ******* break. You have spark plugs that are clean. Take a look at what the clean plugs I drive on look like.

You must be registered for see images attach

Can't seem to find the pics I had of actual fouled plugs. Badger me some and I might remember to take a pic when I'm out there scraping with a small screwdriver and a wire brush. ;)
uh.. i wasnt looking for pity... i was showing an example of plugs from a truck that burned a tiny bit of oil at one point and mostly was just rich fuel mixture... like, its main issue and pretty much only one i can discern from internal standpoint...
 

OldBlueDually

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Minnesota
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Justin
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1976 GMC
Truck Model
C30
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455 Olds
What does the oil look like around 800 to 1,000 miles on it? Dark? Might be years of crud built up, what Josh and BigChip have said I would also check.

If stuff might be plugged up internally in the engine you cannot see, or the oil is just dark and not clean after a short amount of miles, a good oil for cleaning is shell rotella 15-40.

Don't be afraid to also use a little bit of seafoam in the oil too to help get it all cleaned up. At the same time run a good carb/fuel injector cleaner in the tank too. I have done this with engines and it does help to get them cleaned up internally, and requires a bit more frequent oil change to get the crap out. However, after a bit it will be worth it.
 

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