Ok my 302 is smoking pretty hard out of the drivers side, I did a compression test and all the pistons came back at 135-139 psi I put new stem seals in the motor about 6 months ago. I was thinking maybe I cracked a valve guide or bent a valve? At first I was thinking It was oil being sucked from the pcv but after I changed it and rerouted it from the intake to the carb its still smoking any ideas would be helpful. I'm almost ready to just pull it and rebuild it.
Check your PCV system, check for oil in the vacuum modulator line at the transmission and replace the PCV valve.
its blue smoke , does not really do it at fist start but maybe a min into it idle a constant haze out the right side .
I assume you have duals and no "H" pipe (each side is isolated from the other) You may have bad guides on the left head. Its also possible you have a bad intake gasket on that side sucking oil from the valley. Otherwise i would say you have a piston(s) with bad rings or a piston with a cracked/broken ring land.
me and my friend mess around with it again today , its smoking out of both sides , just could not see it due to the driveway the other day . I held the carb open for a bit at about 2000rpms and it was blowing oil out the breather cap and around the pcv valve .
Assuming the PCV system is working correctly you may want to look at the amount of blow by. IF you have excessive blow by into the crankcase that pretty much explains your smoking.
how much blow-by could be expected with those compression scores ? I have been told it could have bent a push rod? or The oil pump that is in it is too high volume for it?
If your engine is just smoking it is NOT a bent pushrod or the oil pump causing it. Replace the PCV valve. make sure the PCV hose is not blocked (check the vacuum on it) Check to see if there is oil on the tip of the plugs.
Yep! Also, a bent push-rod would show up in your compression test. If the PCV all checks out, I think I would pull the intake (check first to see if bolts are loose) and see if oil is being sucked in the intake runners. Give you a look at the innards of engine and see condition inside. Guess you got a look when you did the seals,,,, How did it look then?
well the story on this engine is this - my dad built it about 10 years ago and put it in the mav , well his health took a down turn , long story short its mine the engine was never run but sat in the car outside for all that time . The inside was all brand new new rods bearings valves springs push rods everything , well it smoked bad when I got it and leaked oil bad . I took it out put new stem seals in it and a new gasket kit . engine ran fine for about a month or two save for a little smoke when it was started now its smoking all the time.
Wow, one of those things you wanna do your all to get it going. When you pulled the valve covers, was it very rusty or looked good? When you put the gasket kit in, what all was replaced and how far did you tear engine apart? When, how many times oil changed, and what oil grade are you using? Have you kicked it in the pants yet, smoke some tire or just ole lady driving?
I tore it down to the block with the crank and pistons still in it .No rust at all in the motor. I replaced every gasket you can on the motor. I took it easy for a little while on it then I started driving it hard the way it sits I can spin the tires into 3rd lol. just the smoke is driving me nuts! I'm almost ready to just tear it all down and rebuild it new rings bearings and gaskets have the heads looked at by a shop and call it a day if I cant figure it out!
guys thanks for all the helpful tips but I have decided to buy rebuilt motor from a friend its an 81 302 was just rebuilt and had the heads done ... all I am getting is the block with pistons assembled of course and heads. Will the balancers off my 79 "IE" the flex plate work on that motor if I remember correctly 82 is when they switched from the 28oz to the 50oz ?
Ok , this is what I would do,,, now this is me and not saying I always do right,,, Make sure the PCV is working correct and check to make sure transmission fluid is not sucking through the vacuum lines. Also, check your oil for gas smell, fuel pump could be leaking gas into oil, thinning oil and passing rings. How much oil do you have to add? I would take the intake off and check and see if the intake runners show signs of oil sucking in head. Before you start on intake, pull all your plugs and squirt tranny fluid into cylinder, don't turn engine over, just put as much tranny fluid in each cylinder as you can and LET SOAK! As your cylinders are soaking do your intake, clean your bolts and threads, slight coat of lube on threads, reinstall intake with proper torque. Now with spark plugs still out, turn engine over several times to pump out tranny fluid, yea, be a bit messy and may want to put rags near spark plug holes to ease clean up. Reinstall plugs, and fire car up, run 10-20 minutes, drain oil, Change your oil with 10w-40 and new filter,,, (do me a favor and don't use fram) Hopefully, no more smoke,,, My thinking here is, intake leaking and sucking oil,, may be wishful thinking, or, from engine sitting, the rings either stuck-froze or not seating. Those rings sat a long time,,, may have helped if oil was squirted into cylinders before first start, thats water under bridge. Good Luck!!!
