Looking for a little advice, I've got a 91 s10 blazer with a 4.3l tbi v6 that blows a lot of white smoke after a few minutes of driving. It's got to be burning oil because I'm running low. It started doing this after I accidentally put a half a quart too much oil in on my last oil change. I did a compression check and all 5 (couldn't do the #3 cyl. because steering wheel shaft) cylinders showed 180psi.. Could it be the valve seals or guides? Any ideas would be appreciated.

get a new motor

Thanks:sarcasm1:

white smoke usually means you are burning water, maybe headgasket or cracked block? oil is a blueish color when it burns...usually.

white smoke usually means you are burning water, maybe headgasket or cracked block? oil is a blueish color when it burns...usually.

I would agree. After a few minutes driving the cooling system has pressurized, forcing coolant into the cylinders. My first guess is a blown intake manifold gasket, or possibly a cracked intake manifold.

The cooling system can be pressure tested. If it will not hold pressure for long and there is no external leak, you have an internal coolant leak.

Looking for a little advice, I've got a 91 s10 blazer with a 4.3l tbi v6 that blows a lot of white smoke after a few minutes of driving. It's got to be burning oil because I'm running low. It started doing this after I accidentally put a half a quart too much oil in on my last oil change. I did a compression check and all 5 (couldn't do the #3 cyl. because steering wheel shaft) cylinders showed 180psi.. Could it be the valve seals or guides? Any ideas would be appreciated.
1/2 qt to much should not hurt it.
White smoke can be caused from buring coolant.
Are you loosing coolant?
Is oil deluted or smell like gas or look like coolant in it?
Any oil leaks?
Try another oil change.