Okay I've got a Chevy 350 with 194 heads, long tube headers, true dual exhaust with magnaflow, bran new Quadrajet carb, New plugs, new wires and distributor, less than 15 hours on oil change. Here is the problem the engine has been started twice since the new plugs were installed and they are soaked in oil. The engine runs perfect and doesn't miss or hesitate any at all. Very strong and quick but smokes a very slight bit out of the driver side tailpipe but when you stomp on it the smoke clears up until you let off. I'm thinking it could not be a head gasket because the engine was ran initially without coolant ( not long enough to over heat it only got up to 70 degrees on the gauge) and it smoked even then. The smoke does not smell like oil or anything, it almost doesn't have a smell. This engine was built a few years ago started and ran once and sat in the garage. It was regularly started about every 2 months to keep it lubed up. However it sat recently for 6 months after being installed in a 69 Chevy truck. Didn't smoke a drop when installed but now it does slightly. Possibly valve seals but I can't see every seal on one side failing simultaneously. Any ideas?
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Obviously you have a high mileage engine, I would do a compression check, if that is good, do a leak down test, if you have a weak cylinder, it is likely time for rings, if you have a leak down problem, it is valve seals, or valves, or head gasket. These are generalizations only and there are many other means of diagnosing the problem, but it usually leads to the same thing, a rebuild.
you ought to let us know why you began messing with the timing interior the 1st place. That engine the timing is controlled via the pc and to set the backside putting you ought to placed the pc in a particular mode then set it (i think to 0). Any technique or putting than which will reason the problem to run like crap using fact the pc will constantly be attempting to locate the timing it expects to locate yet will by no potential locate it. in accordance with what you have stated so a approaches first subject i might do it examine to work out if the timing chain is a minimum of in respectable shape. the appropriate examine for it is to eliminate the water pump and timing hide and examine out it yet this is dissimilar artwork. the fast attempt is to eliminate the distributor cap so which you are going to discover the rotor. gently rock the rotor back and fourth to work out how lots play you have between the distributor and cam gears, there ought to purely somewhat be adequate to sense. next placed a large socket and caught wrench (no longer a ratchet) on the huge bolt interior the midst of the pulley on the crank shaft. Slowly rock the crank back and fourth whilst looking on the rotor interior the distributor. The rotor ought to directly substitute instructions once you alter instructions with the wrench. If there's somewhat bit a lag there the chain being worn must be the undertaking. If its too troublesome to coach the engine eliminate the spark plugs, this might make it lots much less complicated. If this is stable and you have had the distributor out in this technique you likely ought to pull it lower back, get the engine set to TDC of the compression stroke on #a million then reinstall the distributor so its pointing on the #a million twine which on the chevs additionally potential the rotor is particularly pointing to the #a million cylinder. #a million must be at TDC while the timing mark aligns. to tell which one is exhaust and that's compression (the only you want) placed your thump over the #a million spark plug hollow and characteristic somebody bump the starter till at last you sense air stress popping out the hollow, while the marks align you're there. Get the oil replaced.
U "could" have bad valve seals or it need some more running time to let the rings seat.
Valve stem seals, I've done em before, its not a hard job.