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Car Forum / Mercedes-Benz Cars / August 20051987 560 sel smoking problem
my vehicle has only 190 thou miles tons of power super clean BUT after idling about 5 min it begins to smoke oil lightly then about 10 min smoking pretty good so I take it out bout a quarter mile down the road and no smoke I turn around punch it and im at about 90 in a hundred yards i pull in the drive about 5 min later smokes back 8 min later lots of white smoke now i press the gas tons of white smoke for 1 min then decreases to none then i take it down the road again no smoke turn around come back very fast no problem back in the drive 5 min later light blue smoke again. NOW the thing is the car was bought yesterday it has sat in a heated garage for 4 years and a divorce later and 1 year outside. basically the vehicle has not been driven (but started and moved around slightly) for 5 years. underneath the oil pan gasket seems to leak slightly on rear corner. I changed oil to 10w40 and new filter and STP oil treatment. Trans fluid was about a quart low seems fine. I just want to figure out some diagnostic ideas other than my own. news:ff6bfd45528af1a3aafa0addf5b114ee@localhost.talkaboutautos.com... > my vehicle has only 190 thou miles tons of power super clean BUT after > idling about 5 min it begins to smoke oil lightly then about 10 min [quoted text clipped - 11 lines] > about a quart low seems fine. I just want to figure out some diagnostic > ideas other than my own. PARK the car >>NOW<<! Looks like you've got a blown head gasket, do NOT turn the engine on, you might add a couple grand worth of damage, like I did. Tow it to the nearest mech. cp its only blue smoke now > its only blue smoke now Blue smoke=oil burning. Check tranny oil. Also check modulator valve vacuum line to see if you have a lot of oil present. Also, check modulator valve vacuum line with hand vacuum pump. Black smoke=too much fuel Steam at exhaust=water/coolant entering combustion chamber somewhere Personally, I would suspect valve guide seals since you seem to have a build-up of oil during long periods of idle. Other possibilities iclude any way oil can enter the intake manifold. Good luck. Sounds like a head gasket failing and dumping oil and coolant into combustion chamber.Also to consider is a crack in the head itself near an exhaust valve.Oxygen sensor is probably screwed up at this point also. its only blue smoke now, i filled r up with 93 octane, changed the oil 10w 40 added some stp and it still dosent smoke aat first only about 5 min later then i rev it up to round 2 grand and a minute later hardly no smoke Contrary to other (pessimistic) opinions I suggest you drive it (don't hot rod it) a while and keep a log of fluid additions. Qt of oil at xxx miles and date , added coolant miles & date, so you have a track of what's going on with this engine. It could be (optimistic) that the rings have gotten "lazy"; some longer drives will cure that. I believe the motor's valve guide seals - the plastic seals around the valve stems - may be worn out and need to be replaced. This can be done without removing the cylinder heads - but wait until you log confirms (i) excess oil use and (ii) no coolant loss. > Contrary to other (pessimistic) opinions I suggest you drive it (don't hot rod it) a while and keep a log of fluid additions. Qt > of oil at xxx miles and date , added coolant miles & date, so you have a track of what's going on with this engine. It could be > (optimistic) that the rings have gotten "lazy"; some longer drives will cure that. > > I believe the motor's valve guide seals - the plastic seals around the valve stems - may be worn out and need to be replaced. This > can be done without removing the cylinder heads - but wait until you log confirms (i) excess oil use and (ii) no coolant loss. What he SHOULD do is check the coolant and oil; if the coolant cloudy and the oil muddy (or cloudy) then it's time to stop. Best to pay $50 and tow it and get it checked out before potentially causing 10 times as much damage. cp Or just use a vacuum gauge if you have one. Connect and if the needle fluctuates between 10 and 25 in./Hg. as the engine speed increases will tell you that the head gasket is leaking. If it vibrates excessively between 8 and 20 in./Hg at idle,this indicates worn valve guides. Park it!!! Too complicated! > Or just use a vacuum gauge if you have one. > Connect and if the needle fluctuates between 10 and 25 in./Hg. as the [quoted text clipped - 4 lines] > > Park it!!! > Too complicated! Not at all,and less time consuming than a fluid log! 5 minutes and your done,so would that be pessimistic or optimistic? hah > Not at all,and less time consuming than a fluid log! 5 minutes and your yeh, 5 minutes if you knows what you is doing! > done,so would that be pessimistic or optimistic? hah I learned my lesson; had I not been too cheap to call a tow truck I would have saved myself $1500 cp <snip> > I learned my lesson; had I not been too cheap to call a tow truck I > would have saved myself $1500 Ouch! Live and learn is the best we can hope for sometimes... >> I learned my lesson; had I not been too cheap to call a tow truck I would have saved myself $1500 > Ouch! Live and learn is the best we can hope for sometimes... Luckily it was only Canadian dollars. cp Im going to do this thanks for the info sir captain coolant good and green and oil was very black now its nice after the change a little bit of leakage behind passenger side valve cover and i see theres oil underneath but no big spots on the ground > coolant good and green and oil was very black now its nice after the change > a little bit of leakage behind passenger side valve cover and i see theres > oil underneath but no big spots on the ground I'd still get it checked out, better pay a bit now than a lot later. cp yes your right, but then what fun would in talking about it? youve made the most sense to me so far, so when i go to replace the seals what else should i replace while im there in your opinion? (on a limited budget White smoke... that could be tranny fluid burning... put a paper towel by the exhaust for a few minutes... then remove it... smell the paper towel... what does it smell like? Coolant? Oil? Tranny oil? how can trans fluid get in the exhaust? > how can trans fluid get in the exhaust? Leaking vacuum modulator. oh, im not too familiar with mercedes this is my first one i really wanted an sec but hey whos complainin. also my sunroof dosent open they say in the manual to do it manually from the trunk by the hex nut. i tried and the nut came loose one way and the other way seemed to go too far with no results also i dont hear the motor running, the fuse is good. one more thing, theres a little motor behind the passenger rear wheel and it runs all the time. it appears to be a self leveler like my cadillac had but im not sure i plan to buy a chilton or haines book soon and study it. chilton only offered 76-89 book im checking haines tonight, some of the other places their manuals were very expensive. I should check ebay too i figure anyway any help will be appreciated thanks > oh, im not too familiar with mercedes this is my first one i really wanted > an sec but hey whos complainin. also my sunroof dosent open they say in [quoted text clipped - 7 lines] > places their manuals were very expensive. I should check ebay too i > figure anyway any help will be appreciated thanks If you want, I have the factory manual on CD, I can send you parts of it. cp *Sometimes not being driven is as hard on a car as rough driving.* white smoke == gas not burning. If the exhaust smells like anything BUT unburned fuel, then consider something more serious. There might be another cause. Per the earlier posting, the coolant/oil check is practical and simple. If the results are positive (that is, if the engine is ill ), then maybe a compression test is in order. It would let you know something as well. And not too expensive to get done. But the Safest thing to do is hire a professional. Some things are not meant for amateur sleuthing. Especially if you don't have the tools Take care of your car and it will take care of you. > *Sometimes not being driven is as hard on a car as rough driving.* > > white smoke == gas not burning No! unburned fuel is black. White is usually water or antifreeze. its bluish only now got lots of tools, besides its a work in progress but i agree id rather go to a professional but the pocket book dosent think the way i do. > got lots of tools, besides its a work in progress but i agree id rather go > to a professional but the pocket book dosent think the way i do. If it's bluish, that is a giveaway for oil burning. Your options become bad ones at that point. Worst case first: 1) Poor oil control at rings. 2) Cracked head or heads, or head gasket. 3) valve seals. The best bet to identify the source of this is to go out when the vehicle is cold and pull all the plugs and examine them carefully. Odds are one or more of them will show some residue of the oil that you see coming out the tailpipe. If it's only one, then you can pursue those valve seals and see if that helps any. Otherwise.... MONDO labor. Your good at this i will check the plugs tomorrow which one is the easiest fix and ill pray for it to be that! Maybe GOD loves mercedes I expect thats the case. |
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