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2002 Chevy S-10 oil leak, pinging

Tiny
RHOVER
  • MEMBER
  • 2002 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 73,600 MILES
Bought used truck two weeks ago, drives like a dream.
Drips like four drops of oil underneath truck. Pings very loud when truck turned off.
Dealer said they could not locate where oil drops from.
Sometimes smells like oil burning. Not sure what the problem is, is this major or minor. Don't want to get ripped off by repair mechanics. New in town. Chevy dealer where I got truck says its ok to drive as is.
Really? Love S-10 trucks, this is my 3rd one. Will try to put in higher octane gas in it today to see if pinging will stop. Thanks
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Thursday, May 15th, 2008 AT 8:19 AM

8 Replies

Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
You bought the truck 2 weeks ago and you have found that it leaks oil and pings when shut off. Did they give you any warrantee on the vehicle. Most likely the leak is either from the front seal or the rear main seal. It could be other leaks but most of the time it happens there or valve cover gaskets that is leaking. I had a car that leaked and found out by washing the undercarriage getting off the old oil and grease. When you shut it off then does it ping? If a octane ping then it would do it more during acceleration. The burning smell is from the oil dripping on the exhaust pipes. With the pinging I would take it back to dealers or have a different mechanic check it.
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Thursday, May 15th, 2008 AT 9:44 AM
Tiny
RHOVER
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Dealer said they could not locate source of oil drip and since it was such a small amt, they said they wouldn't worry abt it.. We don't put a lot of miles on our cars at the most 8k a year... Kust wanna be on the safe side, a bit disappointed if it's repairable and they just didn't want to put the money into it as we have purchased many cars from the same dealer and never had any issues with any of the cars, don't mind getting the truck fixed, just don't want run around from a mechanic sayiing its this and that and all that husband thinks its likely to be head valve gasket seal that needs to be replaced like we said it's only four drops and floor is dry for nearly an hour after engine is turned off, seems like it drips as it cools off we put in a half tank of prem. Gas to see if the pinging stops
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Friday, May 16th, 2008 AT 3:58 PM
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
With a couple of drops is a small amount, The valve covers might be doing it. Check to see if they are tight enough. Sometime they don't need replacing just to be tightened a little. Just so they are tightened evenly. And not too tight. Most cars are made to run on reguler gas. That is something I would check into with the price of gas now a days.
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Sunday, May 18th, 2008 AT 9:16 PM
Tiny
RHOVER
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  • 4 POSTS
Well, husband is the one who drives the truck, says it makes a funny knocking noise which he only can hear because it's parked in the garage and when the garage doors are closed, only knocks after turned off. ( We are both hearing impaired ) He says it knocks for a few min. After turned off. Then stops. The four drops of oil under the truck is evident only a couple of hours later. So of course, test driving the truck two weeks ago, we did not notice the oil drips because we didn't stand in parking lot for two hours then look under it! And knocking sound not evident when outside due to all other noise and hearing aids pick up the wind sounds over the knocking sound. Just wondering what might be the problem. Hearing person rode in truck and said it sounded great and all that did not hear knocking either when outside! 2002 S10 with 73k miles. We hope to hear from somone before going back to the dealer - should be interesting to see what they say, if the truck is really ok, we would like to stop worrying about it.
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Monday, May 19th, 2008 AT 8:32 PM
Tiny
MIKE H R
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  • 3,094 POSTS
If the knocking gound still persists after turning off the engine then the truck is what they call dieseling. Some vehicles do that but are not suppose to. Try looking at the engine when someone turns off the ignition and see if it turns after shut it had been shut off. If so then take it back to the dealer and explain to them what it is doing.
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Monday, May 19th, 2008 AT 9:30 PM
Tiny
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I drove my truck to several places today, noticed only could hear the knocking or ticking or clicking noise if it was housed in garage so I could hear it as I am hearing impaired. Only does it when car is turned off and the noise goes on a few min. Looked under hood, car is not turning over... Other than that, the car drives great, has 73K miles on it. Oil drip underneath car is lessening a bit, not sure what that mieans, it was only a few drops and I am not quite sure how to tighten the bolts on the valve head gasket.
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Tuesday, May 20th, 2008 AT 9:20 PM
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

The knocking or pinging sound could be the Catalitic converter Cooling down. It may be over heating. Possibly partially clogged.
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Wednesday, May 21st, 2008 AT 2:26 PM
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
You hear the ticking after the car is shut off and is in the garage. It might be that the engine exhaust gets warm and when shut off it sometimes makes a crackling sound as it cools down. You say the truck runs good, keep checking the oil once in a while so it does not get to low. If you have any other problems let us know. Mike
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Thursday, May 22nd, 2008 AT 8:05 AM

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