Question about 2000 Mazda 626

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99 mazda 626 lx -i have a slow oil leak. only leaks when i drive.

I have a slow oil leak. only leaks when i drive. does not show puddle when parked maybe a small drop after 3 hours. i have had all gaskets replaced, head, timing belt, etc. except oil pan, could that be it? is standard trans with 234,000 miles. i use synthetic oil. runs excellent except for this annoyance. 99mazda 626 lx

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  • comakozi Apr 27, 2010

    there is oil all over the oil pan. you can see a slow drop dripping after a while from it. the whole pan is wet. i have wiped it down and still cannot find where it is exactly comming from. i have ran my hands along side the engine but it seams to be only comming from the vecinity of the oil pan area. when it is parked it doesn leak hardly any but when i drive its prob comming out. i drive 250 miles a week to work not including my personal driving. so i go through a whole tank of gas and maybe a quart a week. but still it is wet underneath the oil pan. i hope this clarifies somewhat.

  • stepmckirgan May 11, 2010

    what do you mean by leaks when you drive?. If by that you mean you don't see oil on ground but you have to add oil, engine is burning oil! Is the exhaust smoke have a blue colour to it ,this will tell give you the answer.

  • Mike McCauley
    Mike McCauley Jun 03, 2014

    prob the cam seal.its on the ends of the heads.mine did that also.

  • Mike McCauley
    Mike McCauley Jun 03, 2014

    camshaft seals on the ends of the heads.ones behind the bracket that holds the coil pack on if its a 2.5 v6.mine was leaking and had to add every few weeks.

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Suggest trying to wash off engine as good as possibe start from top down thenrun car on 20 minute road trip and than with car running check engine looking at top of engine and working your way down...gravity right! and check that valve cover bolts are tight and if valve cove gaskets not done ( but reading your complaint it looks like they were,.) If you suspect oil pan gasket inspect closely and cheeck those bolts as well, if any loose, do gasket.

Posted on Apr 27, 2010

Testimonial: "ill try that. thanks! they say you can put a dye to see the leak? what kind of dye is this? will it mix with the synthetic?"

  • stepmckirgan Apr 28, 2010

    Acoolant dye, you will need a light as well but if you've done haed and so on thee is no need.

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It sounds like it's actually burning the oil, rather than leaking it then, I'm assuming that your usage is a lot more than the drop you mention. The entire car has 234k on it? (or did you mean just the trans?) With that many miles I wouldnt be surprised if your valves are letting a little oil slip into the combustion chamber. If the usage is bad enough, it may be time for a valve job, or even a rebuild.

Posted on Apr 27, 2010

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