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Old 03-03-2013, 09:46 PM
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327 ran great now wont start after oil change

hello. i am having trouble with my 327 motor in my 64 chevy stepside. i just got it up and running and it was doing fine. i change my oil to a 10/40 with lucus oil stabilizer to stop it from smoking and it worked great. i turned the engine off and a hour later it wont start it just cranks over and back fires with the ocasional ball of flame out of the carb wich is a edelbrock 750. not sure if my coil failed, or if it jumped time, or if its my carb. what kinda has me stumped it how can it go from running great to not even starting. any help and advise would be greatly appreciated.

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Old 03-03-2013, 10:58 PM
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check for spark/fuel/compression. use an inductive timing light if you have one
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Old 03-04-2013, 12:11 AM
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Checking the flow and pressure before going down the road helped me out in the past especially if new when it came to warranty issues. Check your TDC. If no test light.
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Old 03-04-2013, 06:38 AM
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You mentioned "just got it up and running", which I take it to mean its been sitting for quite a period of time and depending on where you live it may be water condensation in your fuel tank ... just a thought. So I would be checking for fuel issues and as well since its easy to do, pop the cap off the distributor just in case there was moisture in it and warming up the engine will drive the moisture up into the distributor cap. Most likely its something simple but stops an engine in its tracks.
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Old 03-04-2013, 07:31 AM
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thanks for your ideas guys. ya it had been sitting for a lil while before i got it going. once i got it started it would jump to life with just a touch of the button. now it just cranks and no start. im going to check the tdc today and see what might have went wrong. i will also check the dis cap for moisture and we will see where we go from there. thanks again and please feel free to give any advise as it is much appreciated...
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Old 03-04-2013, 07:34 AM
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If it came to operating temp then had difficulty, the carb setup sounds bad. You set the edelbrock carb up like the instructions for a baseline, of coarse. Why would anybody not do that. How is the choke setup?

Check compression, spark, and watch for fuel out the accelerator pump. Just in case.

You made it stop smoking with 10/40. Why was it smoking. A thicker oil has no effect on exhaust gas output, in many situations. What was in it before , trans fluid?
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Old 03-04-2013, 07:37 AM
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oh, and after cranking it and a few backfires later i pulled a plug and it was a lil fouled with a lil oil and gas. does anyone think my oil stabilizer was too thick with the 10-40 i put in it and maby blown a seal
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Old 03-04-2013, 07:41 AM
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the choke is set up with a pull lever in the cab and runs to the side of the carb. if thats what you were asking
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Old 03-04-2013, 07:54 AM
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the oil on my dip stick smells like gas is that from excesive cranking or something much more?
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Old 03-04-2013, 07:56 AM
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I assumed it was present. I was looking for the amount of choke door , high idle throttle blade.

An engine should be easily able to withstand multiple backfires. In reference to driven type vehicles.

Your probably flooding because of incorrect choke setting, and timing setting.

Start checking things off as good/bad that are related to the problem.
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Old 03-04-2013, 08:04 AM
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i had 10 30 in it and i assumed it was smoking from cylinder groves in the cylinder wall of the pistons.
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Old 03-04-2013, 08:04 AM
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Quote:
Originally Posted by 64 chevy step View Post
i had 10 30 in it and i assumed it was smoking from cylinder groves in the cylinder wall of the pistons.
Wait , what?

You wee thinking at idle your crankcase was leaking vapors up through the rings and out the exhaust valve?
And 10/30 to 10/40 would change that?

Not being smart , just looking for a thought process. Don't care about spelling or out of order words. Im trying to help.
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Old 03-04-2013, 08:11 AM
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i thought that if i was smoking out of the eguaust the oil was too thin and getting past my piston rings there for burning the oil off in the conbustion chamber wich caused it to smoke. when i changed it to a thicker oil it stoped smoking.
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Old 03-04-2013, 08:18 AM
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Quote:
Originally Posted by 64 chevy step View Post
hello. i am having trouble with my 327 motor in my 64 chevy stepside. i just got it up and running and it was doing fine. i change my oil to a 10/40 with lucus oil stabilizer to stop it from smoking and it worked great. i turned the engine off and a hour later it wont start it just cranks over and back fires with the ocasional ball of flame out of the carb wich is a edelbrock 750. not sure if my coil failed, or if it jumped time, or if its my carb. what kinda has me stumped it how can it go from running great to not even starting. any help and advise would be greatly appreciated.
First thing, reach in and see if you can easily turn the distributor. It sounds a lot like the distributor was loose and turned while the engine ran. It would have turned in the direction that the rotor turns, which would retard the timing- that is unless the engine did one of those "kick-back" deals when you shut it off, which could have advanced the timing. But my money's on it being retarded by the description you gave. So turning it back CCW a little should let it restart, but it still needs to be timed using a light.

The gas in the oil was a result of pumping the carb while trying to start it, or by the choke being closed enough to draw fuel into the intake. If it's excessive, change the oil and filter.
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Old 03-04-2013, 08:19 AM
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Sometimes oil comes down the valve, through a stem seal or whatever, and causes some smoking. I always fixed the leak.
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