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Okay I was helping my uncle change the spark plugs, oil, and filter on his 1993 Crown Victoria. Changed everything no problem, put in 5 quarts of oil and started her up. It started making this noise in the engine so we shut her off. long story short we put in a total of 5 quarts before noise then 1 more after and noise went away. Now gray/light blue smoke is coming out the exhaust. I know that over filling is one issue, I’ve already removed the extra oil. But why the noise and smoke?
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spark plugs too long (or is that just happens on my lawn mower?) or it was a dry start because the oil filter wasnt primed. does it still make the noise? does it run smooth? also check the plug wires make sure you put them on tight.
There would be a slight rattle from the engine at startup but should disappear immediately.
Is the engine misfiring ?When overfilled, the crankcase churns the extra oil into a frothy ineffective mess that overflows into lots of places it shouldn’t be. One problem with overfilling is the oil can get into PCV passages that are designed for blowby gasses. Those passages lead back to the intake manifold, which leads back into cylinders, causing oil burn and possibly damaging the cat if it is a big volume or if it goes on for long. You did the right thing by draining excess oil, then letting the vehicle sit for quite a while allowing gravity to pull oil back to the pan. Hopefully there is no long lasting damage. I would double check your work, looking for leaks and especially looking at the new and the old filter to be sure you didn’t leave an extra filter gasket on the engine. I would also look closely to be sure you didn’t spill oil anywhere else. You want to be certain you drained from the correct oil pan bolt (rather than the trans pan or diff) before you refilled. I like the idea from lord ihcalam, to double check that the new plugs were not longer than the old plugs.
Guys thanks for the quick response, after adding new oil there was the rattle, then sadly we added the extra oil, I went away after 2nd start up. Now the spark plug being to long Is that the actual plug or the gap? Gap was done before we put them in. Also the check engine light came on last night.
He is talking about using the wrong type of sparkplug – some have longer reach into the combustion chamber. Double check that the right plug was used (maybe compare them to one you took out).
As for blue smoke, like spelunkerd said, when you overfill the crankcase there is certainly a possibility that oil is being sucked into the PCV system and burned.
yes. look at the threads on the plugs. if one is drastically longer that could be an issue. but if its not tapping anymore then probably not just dry start. you said the CEL came on have you pulled the code yet?
The spark plug were the same from the old ones, Now the catalytic converter was clogged and they straight piped two, and left two on for now. I’m thinking that might be the code. Its a 93 so having a hard time finding place to pull codes
*by the way it had 4 catalytic converters
when we punched the cats in my brother’s mustang we had to use a modified spare tire rod from an explorer to reach them. shouldve just cut them out and turned them in for money. are the 2 that are left on either side or together on one side?
There are a few things that can cause the blue smoke, a clogged PCV system or a worn out engine. The fact that you have engine noise gives me pause as that could indicate a problem with the engine. Since this happened just after you changed the oil I might pull the oil filter off and change it and then recheck for the problem. You may have gotten a bad oil filter. If that’s not the case then I would recommend checking the oil pressure to see if it’s in spec.
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