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  1. Join Date
    Jan 2014
    Posts
    57
    #1
    Guys I need some advise sa mga may alam sa ganitong engine.

    QG16DE is in my nissan exalta. I encounter hard starting problems then a mechanic inspected my spark plugs and found na basa lahat ng oil and yun daw ang cause bakit mahirap i start. Sabi nung mechanic i should replace the valve cover to fix the leak dahil kasama daw sa valve cover yung mga seals.


    Is the mechanic right, or is there any other oil seals / spark plug seal that can cause a leak? Mahirap po kasi maghanap ng valve cover and tingin ko sa casa lang ata meron na brand new. Meron na po ba naka encounter ng ganito sa inyo?



  2. Join Date
    Jun 2005
    Posts
    3,762
    #2
    Quote Originally Posted by ambasad0r View Post
    Guys I need some advise sa mga may alam sa ganitong engine.

    QG16DE is in my nissan exalta. I encounter hard starting problems then a mechanic inspected my spark plugs and found na basa lahat ng oil and yun daw ang cause bakit mahirap i start. Sabi nung mechanic i should replace the valve cover to fix the leak dahil kasama daw sa valve cover yung mga seals.


    Is the mechanic right, or is there any other oil seals / spark plug seal that can cause a leak? Mahirap po kasi maghanap ng valve cover and tingin ko sa casa lang ata meron na brand new. Meron na po ba naka encounter ng ganito sa inyo?


    its possible na dun dumadaan yung langis. meron naman pyesa ang sentra. have you tried youngbros in banawe?

    Sent from my Thrill 430x using Tapatalk 2

  3. Join Date
    Jan 2014
    Posts
    57
    #3
    hindi sir. dito ako sa cavite area eh. What other parts are you referring ?

  4. Join Date
    Nov 2005
    Posts
    2,372
    #4
    Sir, mostlikely overhaul na iyan, pagsinwerte kaya pa ng top overhaul yan.

    kasi kung valve cover lang hindi dapat basa ang sparkplugs mo kasi sa ibabaw iyun, oil seal (yan ata term) naman sa ibabaw tatapon langis mo - nangyari na sa akin yan although ung sentra ko eh 1.3L carb type lang.

    try mo paestimate sa Fritzie Trading along molino blvd. (medyo mataas sila magpresyo) or sa Ros Autoworks (mura ito, pero havent tried them, pero madami ako nakikita na nagrerestore sila ng old school na auto. along molino near soldiers hills 4.

  5. Join Date
    Oct 2002
    Posts
    17,340
    #5
    Have a compression test done first to determine what exactly could also be the problem (piston rings, seals, etc).

  6. Join Date
    May 2006
    Posts
    635
    #6
    I correct mo muna yung pag babasa ng sparkplug ng oil, usually yung sparkplug oil seal na nasa valve cover ang culprit. some engines ay kasama na sa valve cover ang mga sparkplug oil seal meron din hiwalay. madali lang naman tanggalin yan.

  7. Join Date
    Jan 2014
    Posts
    57
    #7
    Thanks sir. I have to do that. Nag canvass ako ng brand new valve cover sa casa around 6k daw. San kaya meron makukuhanan iba ? Kahit surplus okay lang ba?

  8. Join Date
    May 2006
    Posts
    635
    #8
    better look na lang kahit replacement brand wag lang 2nd hand (rubber material yan), sa mga auto supply wag na sa casa. gasket lang yun and not the valve cover mismo.

  9. Join Date
    Mar 2008
    Posts
    52,523
    #9
    teka... inerase ko ito, a.
    na-erase nga uli..
    Last edited by dr. d; March 7th, 2014 at 11:24 AM.

  10. Join Date
    Mar 2008
    Posts
    52,523
    #10
    Quote Originally Posted by ambasad0r View Post
    Guys I need some advise sa mga may alam sa ganitong engine.

    QG16DE is in my nissan exalta. I encounter hard starting problems then a mechanic inspected my spark plugs and found na basa lahat ng oil and yun daw ang cause bakit mahirap i start. Sabi nung mechanic i should replace the valve cover to fix the leak dahil kasama daw sa valve cover yung mga seals.


    Is the mechanic right, or is there any other oil seals / spark plug seal that can cause a leak? Mahirap po kasi maghanap ng valve cover and tingin ko sa casa lang ata meron na brand new. Meron na po ba naka encounter ng ganito sa inyo?


    which part of the sparking plug is wet with oil?
    if it is the porcelain end, then it's probably due to oil dripping from a defective valve cover oil seal above.. this can be fixed by replacing the gasket with a new (never used!) seal.
    but if the business end (sparking end) is oil-fouled, then it's probably worn oil scraper ("piston ring"), valve seal, head gasket, or (gulp!) cracked engine block.. ka-ching!!!

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