View Poll Results: Does your S30 leak oil

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  • Yes

    14 35.90%
  • No

    23 58.97%
  • umm kinda

    2 5.13%
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Thread: Does your S30 leak oil?

  1. #1
    Registered User surfer.tech's Avatar
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    Default Does your S30 leak oil?

    I dont know how to create a Poll on this website but here goes.

    Does your S30 leak oil? Is there a way to have a oil leak free engine?
    Rebuilt with new gaskets?
    original and leaking? etc. Lets hear it!
    Last edited by surfer.tech; 06-20-2012 at 09:49 PM. Reason: spelling
    HLS30137283

  2. #2
    Registered User grantf's Avatar
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    Default

    I think I have oil leaks all over just not so bad as to make me want to do major repairs. Rear main may be leaking a little. I fix them as I go.

  3. #3
    Registered User tlorber's Avatar
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    No oil leaks. My motor (L28 in my 240) has a "Remanufactured by Nissan" tag on it. I doubt there are more than 10k miles on it but I have no way of knowing. Anyhow, I guess they did it right.

  4. #4
    Registered User Jetaway's Avatar
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    No oil leaks. 200,000+ on an L24. Wish I could offer tips, but I don't know how it has pulled it off. BTW: It's been without one valve cover bolt for two years since a friend snapped the bolt off in the block. Still, no leaks.

    Chris

  5. #5
    Registered User Jeff G 78's Avatar
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    I've had 10 S30's over the past 25+ years and I can't remember any of them ever leaking a drop of oil.
    Jeff
    Northville, Michigan
    IZCC #1285
    '78 280 10:1 CR, Arizona Z Car header, urethane bushings, Tokico springs, Illumina struts, Panasports w/Hankook R-S2 225/50R16 tires, Maxima 105 amp alternator
    http://www.classiczcars.com/photopos...00&ppuser=7975
    '74 260Z BRE look-alike crap can for Optima Batteries ChumpCar World Series Racing racing
    https://www.facebook.com/Jeff.Grauer

  6. #6
    Former frequent poster sblake01's Avatar
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    The only time I can recall having an oil leak is when the oil pressure sensor was leaking.
    2004 Ford Ranger EDGE Supercab
    (@Moonpup: This one really is an EDGE!)
    2005 Pontaic GTO
    2010 Mercedes Benz C300 AMG Sportline (Wife's car)
    2014 Kia Rio LX (Wife's daily driver)
    Certified HVAC/MVAC Technician

  7. #7
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    Default

    Click image for larger version. 

Name:	6269300045_large.jpg 
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ID:	54272No leaks on my former Z with the built L26 or my current Z with it's LS1

  8. #8
    Registered User Ben's Z's Avatar
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    Tailshaft on trans. Replaced seal, started leaking again about 5 days later. To hell with it. Very Minor.
    1977 280Z 5 Speed
    HLS30-388451

    Do you know where my Grandpa's 240z is? He sold it around 1994. I think it was a 72. It was orange with black interior and some sort of scissors style aftermarket crank up sunroof. I think it was sold to a fellow pharmacist and I think he was from Egg Harbor Wisconsin. At the time the car had between 32-36k original miles. He sold it for the lowly sum of $3000-$3500. My grandpa passed away a few years ago and I would like to know its whereabouts.

  9. #9
    Registered User conedodger's Avatar
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    Both the 914 and the Z leak a tiny bit. I figure they are just marking their garage territory...
    Rob
    2000 BMW R1100 RT-SE (for sale)
    1999 Toyota 4Runner Supercharged
    1975 Porsche 914 stroker motor autoX car
    1973 Datsun 240Z Restoration project. New paint in original white. E31 head on 2.4 block. Nissan Motorsports header. R200 with Nissan motorsports LSD.

  10. #10
    Registered User steve91tt's Avatar
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    Both my 240Z's leaked everywhere when I bought them but now that I have redone all the seals and gaskets I have no leaks.
    Steve

    1973 240Z (daily driver)
    1971 240Z (track car)

  11. #11
    Registered User madkaw's Avatar
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    When you put the seals in the right way-they don't leak
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

  12. #12
    Registered User psdenno's Avatar
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    I've owned my '71 since it was new and have only replaced the valve cover gasket and water pump gasket during routine maintenance - no leaks ever.
    Dennis
    1971 240Z - Original Owner
    2010 Infiniti G37 Convertible

  13. #13
    NW Native JonnyRock's Avatar
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    Mine weeps. I should just replace the gasket, but I'll get to it when I get to it...
    ***PREVIOUSLY OWNED***
    1970 Datsun 240Z
    HLS30-01704
    71,000 Original Miles

    - Jon

  14. #14
    Registered User LeonV's Avatar
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    Default

    It did, until I tightened the previously finger-tight oil pan bolts.
    2/74 260Z

  15. #15
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    Not even a weep. I think that it's a factory original 1978 engine, looks like it's never had work done on it.

  16. #16
    Registered User Gary in NJ's Avatar
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    Mine was leaking badly when I got it. Turns out the timing cover was loose. With each bolt tightened to 8 lb/ft I haven't seen a drop of oil in my CLEAN garage.

    For what its worth, my '71 was tight as a drum as well.
    Gary
    Guardian of HLS30-91415
    Previous Owner of a 10/70 240Z ('83-'85)

  17. #17
    Registered User Oiluj's Avatar
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    Dry as a bone. Engine rebuilt & I replaced rear seal on tranny as a precaution. Original diff is still tight and there are no records of anything being done to it. (I have all records).
    I'm hoping my rebuilt 5-speed doesn't leak after I install it!
    Julio
    1972 240Z (in-progress, 95% complete)
    CZC# 15388

  18. #18
    Registered User surfer.tech's Avatar
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    Interesting. I guess I should overhaul the Z soon, with new gaskets. Not too familiar with This car.
    HLS30137283

  19. #19
    Registered User
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    Default

    I have a leak at the rear main seal. Been leaking for at least the last 14 years. Yes I have the parts to fix it, just to many other demands on my time.

  20. #20
    Registered User Stanley's Avatar
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    73 Z, 136000 mi. Leaked a little til I put teflon tape on the oil pan plug and torqued the pan bolts. Also tightened the trans cooler line clamps, and torqued trans pan bolts. Saw some oil by a front cover bolt that didn't drip to the ground though- need to torque those.

  21. #21
    Registered User george71z's Avatar
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    Cool

    FWIW, when i attended the 2011 convention in Savannah, they gave everyone a plastic mat to put under the cars that were in the convention center. When the judging was done, and the day was over, and the S30 group pulled their plastic mats out from under the cars, NOT ONE had a drop of oil on it. I was so proud.
    72 240-- stock motor and drivetrain, 50,500 orig. miles

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