KA24E BLACK/BLUE SMOKE! NEED HELP GOING TO THE TRACK NEXT WEEK!!!

ONLY for ADVANCED technical discussion about the 240sx!
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kennymillsjr
Posts: 38
Joined: Sun Jul 12, 2009 11:13 am
Car: 90 nissan 240sx

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ok like the title says, when i rev my car up it smokes a blackish blue smoke(Realy Thick). tha thickness realy comes when i let out the gas after reving it up..what could be wrong here? my compression is fine!!


Klits562
Posts: 722
Joined: Fri May 15, 2009 8:36 am
Car: white s13 coupe
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blue/black smoke means your burning oil Idk what will could be causing it theres alot of possiblities search the forums its been covered

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kennymillsjr
Posts: 38
Joined: Sun Jul 12, 2009 11:13 am
Car: 90 nissan 240sx

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do you think my headgasket could be causing this?

tyrodtom
Posts: 73
Joined: Thu May 07, 2009 1:45 pm
Car: 90 240SX

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If you mean the smoke is bad when you let off the gas going into the turn, the engine is under high vacuum then and sucking oil past your intake valve seals. You got bad intake valve seals. If you compression is fine, then your headgasket is ok, and the same goes for your rings, I circle track race a 240 on the other end of the state.

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PuNcHdRuNk
Posts: 70
Joined: Fri Dec 04, 2009 12:10 pm
Car: s14 240sx

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tyrodtom wrote: If you mean the smoke is bad when you let off the gas going into the turn, the engine is under high vacuum then and sucking oil past your intake valve seals. You got bad intake valve seals. If you compression is fine, then your headgasket is ok, and the same goes for your rings, I circle track race a 240 on the other end of the state.
also could be your turbo oil seals , if its accessable disconnect your down pipe and see if you have any oil in the pipe. if not then its not the turbo

lol forgive that just read its an n/a

tyrodtom
Posts: 73
Joined: Thu May 07, 2009 1:45 pm
Car: 90 240SX

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I added that because from the picture in his avatar, his location , and his name, I know he circle track races a 240 at South Boston Speedway, and probably also at Orange County Speedway in N.C. The rules at either track allows no tubos. I raced at Orange County several years ago, and I remember his name.

zslicktop
Posts: 10
Joined: Mon Jan 05, 2009 6:51 am
Car: 1992 300ZX Slicktop

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Nice to see I'm not the only one that circle tracks a 240! You guys running asphalt or dirt?

tyrodtom
Posts: 73
Joined: Thu May 07, 2009 1:45 pm
Car: 90 240SX

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3/8 mile asphault, 17 deg banking, Lonesome Pine raceway, Coeburn, Va. I've raced my 90 240 there since 2003, 29 wins, most at that track. Both South Boston raceway in Va, and Orange County raceway, in N.C. are asphault.

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kennymillsjr
Posts: 38
Joined: Sun Jul 12, 2009 11:13 am
Car: 90 nissan 240sx

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well i guess i will put another head on it..i did find a hole in the head right were the exhaust manifold bolts up to on the head...allowing water to get in the exhaust pipe! and i wouldnt be surprised if the valve seals were bad also!


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