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420A Bolt-on Tech: Intake, exhaust, ignition, fuel system, cooling, etc - specific to 2G N/T DSMs. New Members must limit their 420A tech posts to this forum.

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Old 09-20-2006, 07:40 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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Burning oil, but compression is good.


Ok i have a 95 eclipse with roughly 160,000 miles on it. I haven't done any internals yet so heres my problem.

im burning oil like crazy i burned about 4 qts. in about an hours drive of not getting on it but interstate cruising. I did a compression test and leak down tested. On the number 1 cylnder it was 250, #2 was 230, #3 was 230, and #4 was 250. It also didnt leak. Now it smokes at idle and driving but not alot. My spark plugs are black but there wasnt any oil on them. Im also not burning coolant.

Any help would be appreciated.

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Old 09-20-2006, 08:13 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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Originally Posted by knight007
Ok i have a 95 eclipse with roughly 160,000 miles on it. I haven't done any internals yet so heres my problem.

im burning oil like crazy i burned about 4 qts. in about an hours drive of not getting on it but interstate cruising. I did a compression test and leak down tested. On the number 1 cylnder it was 250, #2 was 230, #3 was 230, and #4 was 250. It also didnt leak. Now it smokes at idle and driving but not alot. My spark plugs are black but there wasnt any oil on them. Im also not burning coolant.

Any help would be appreciated.
its obviously not a compresiion problem with those numbers. I would say you should probably replace you valve stem seals. especially if it smokes when you first start the car.
also make sure the spark plug hole seals on the valve cover gasket arent shot.
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Old 09-20-2006, 09:53 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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^^^^ I agree, I had the same problem. And redoing my whole head fixed the problem. Now you dont have to go to the extreme I did. But I thought that this was an excelent time to rework my head. Also make sure you replace your spark plug seals and your valve cover selas they are cheap..and very important. Good Luck
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Old 09-20-2006, 12:32 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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Agreed to above posts. In the mean time ive been using thicker oil with additives with/or lucas treatment and it reduced my consumption by around 40-60 percent.

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Old 09-20-2006, 12:37 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #5 (permalink)
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I also agree, but you might consider buying a remanufactured head that's all ready to go, save cams. It will likely cost a bit more, but you can swap heads (don't forget the head gasket and timing belt stuff - maybe an oil or water pump while you're at it) in an afternoon and be back on the road with a spare head that you can either modify for performance in the future or sell to recoup some money. Blown valve seals are no reason why a used head should fetch anything less than average money.


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Old 09-20-2006, 03:01 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #6 (permalink)
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Thanks for all the help guys im going home tommorow and the head should get sent off friday.
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Old 10-01-2006, 05:33 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #7 (permalink)
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Ok I went home but before i head to take the head off i had to get it home so i put some oil in it and checked that started it up and it drove great i am confused beyond believe. I didnt burn any oil and i drove it all weekened a good 30 miles a day. Im lost??
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Old 10-02-2006, 08:48 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #8 (permalink)
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Quote:
Originally Posted by knight007
Ok I went home but before i head to take the head off i had to get it home so i put some oil in it and checked that started it up and it drove great i am confused beyond believe. I didnt burn any oil and i drove it all weekened a good 30 miles a day. Im lost??
Hopefully you have oil pressure lol. j/k.

hey cars do wierd things it will probably start burning oil again soon. I would suggest you run some seafoam through the motor. use some vacuum hose and suck up about half the can through the pcv valve to intake manifold hole. shut the car off immedatly for about 5 minutes and then restart it. drive the crap out of it for 15 minutes and burn it all out. then re-check for your previous symptoms.
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