964 burning oil
11-01-2010, 02:26 AM
#1
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964 burning oil
Hi IAll, This is my first post. I searched the threads . My 964 has 90k and sat the past year waiting for me to rebuild the brake system and harness in the truck from an electrical fire. It always burnt alittle oil when started but cleared after a few minutes. I changed the oil and started it for the first time in a year. It idled fine but smoked like crazy for 10 minutes till it stalled. I assume the plugs fouled. Any thoughts? Could this be the seals on the valve stems or worse?
11-01-2010, 08:46 AM
#2
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Oil probably built up in cylinders while sitting, which is quite normal. May need to clean/replace sparkplugs? All engines consume some oil and more as they wear. If your oil consumption is higher than normal it could be from many sources including valve guides/seals, piston rings, etc. I'd try to get the engine running cleanly first and then see about a cold/hot leakdown test and valve/guide wiggle inspection.
Last edited by beentherebaby; 11-01-2010 at 10:41 AM.
11-01-2010, 10:06 AM
#3
IHI KING!
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Since the car was sitting for quite a while, I would drive it for a while to see if this was a result of storage or a problem. My bet is that it was the storage and that your engine is fine.
11-01-2010, 11:15 AM
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I thought once it heated up the "build up" would clear but the smoke didn't let up. I put 8 quarts on the change so as to not over fill but from the amount of smoke it might be inhaling oil. Is that possible with it not over filled? I'll have to pull the plugs to get it started. Can I disconnect the oil breather?
11-01-2010, 11:45 AM
#7
IHI KING!
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My cab smokes a lot upon start up after it sits for the winter. I think last time, it smoked for 10-15 minutes at idle. I could be mis-remembering but it seemed like a long time. Get the car on the road and drive it for 30+ minutes. I bet the smoking goes away, unless you have an over-fill issue.
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11-01-2010, 11:59 AM
#8
Nordschleife Master
While sitting , the oil seeps past the rings and gets into the cylinders .
You started up the motor and the oil gots hot and pumped into the exhaust system , as the exhaust system gets hotter and hotter the oil gets a boiling / fuming .
You started up the motor and the oil gots hot and pumped into the exhaust system , as the exhaust system gets hotter and hotter the oil gets a boiling / fuming .
11-01-2010, 12:53 PM
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It sounds like you never started the engine before the oil change and therefore the thermostat wasn't open. Not sure where the oil was sitting because of this, but did 8 quarts drain out?
11-01-2010, 01:52 PM
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It was cold when I did the change, I probably got close to 8 out. The thermostat thought is interesting. The dipstick doesn't have any oil on it. I was hoping it was in the exhaust but I think it's burning in the cylinders because it stalled and now sputters when I attempted to start up hence I probably need to pull the fouled plugs.
11-01-2010, 02:50 PM
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Burning Brakes
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"I probably got close to 8 out" that's encouraging. "The dipstick doesn't have any oil on it." This is not unusual, engine has to be warm, thermostat open and on level ground running to get an accurate measurement. Maybe seized oil ring, I've seen this happen when engines sit for prolonged periods withot being started.
11-01-2010, 03:11 PM
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I will like to add to what Darth said, if you put 8 quarts in a cold engine there is a VERY good change that you overfilled it; a HOT oil change calls for adding 6 quarts, then start up the engine and let it warm up as you add the rest, normaly somewhere between 9 and 10 quarts. I would try to get the engine up to operating temp, and then check the oil level on the dipstick.
ENGINE RUNNING ON LEVEL GROUND OIL TEMP AT 194 DEGREES.
ENGINE RUNNING ON LEVEL GROUND OIL TEMP AT 194 DEGREES.
11-02-2010, 07:49 AM
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+1. It is embarassing to need to clear the oil build-up, but the engine does not get hot enough to burn off the oil until you get it at some high power settings. The best way to put a serious load on the engine is to accelerate up long up-hill grade and hold highway speed. This can actually be fun. You will see a lot a blue smoke at first, but it it clears, your engine is OK.
