Question about 2005 Mazda RX-8

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How to fix a blown head gasket on a mazda rx8 just went out to star my can and nothing there is yellow stuff on the dip stick

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The is no headgasket on a rotary engine....This milky substance does not affect engine performance or any other functions of the vehicle. During cold weather, moisture contained in blow-by gases (exhaust , oil, fuel, water vapor) is cooled by the intermediate housing wall and condenses due to difference in temperature. A chemical reaction between the moisture reacts and the engine oil in the intermediate housing will yield the milky fluid. This fluid then eventually dissipates
as the engine warms up to full operating temperature.

The milky fluid does not affect the quality of the engine oil and therefore the engine performance is not affected either. Mazda has verified that the amount of moisture in the oil is within the acceptable standard for motor oils commonly found in the market.

However, you should verify that the coolant reservoir is full and that there is no sign of engine coolant leakage.

You can also go to you Mazda dealer and ask for a new oil level gauge tube plastic insert which has been developed as a countermeasure to keep the milky substance off of the dipstick (however, the substance will still be in there- it's a cosmetic fix only).

Posted on Nov 15, 2009

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Ive just bought a 2007 57 reg mazda rx8 231 bhp & when it got delivered I noticed water dripping from underneath when it was driven of the car transporter ,,so when ive checked the water light was on on the dash so I put fresh water in & started the car I let it run 10mins or so but the temp gauge seemed to go well over half way & the water bottle was starting to spirt water out & I don't have a clue mechanically please help as lost a few quid on car so put it on ebay but people keep saying its head gasket but ive read these don't have a headgasket ,,& something about a common fault where a gap doesn't exspand when at running temp to seal the heads due to a build up of rust as the car had been stood for several weeks unused ,,please advise ,,stunning car but well put off by this ,,allways wanted 1 & this happened gutted stephenhenry2010@hotmail.co.uk

Posted on Jan 19, 2014

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Yes thats water or coolant in the oil .
So now the big problem, can you do the job or have you got to get a workshop to do it as it could be the head or gasket..
But tell me how was it running the last time you drove it and what happened ,was it running hot/or rough/missing ???????.
how much water do you have to put in to fill it before starting in the last week.or have you been checking the oil and water every week.
DID you see any white smoke out the exhaust pipe when starting or driving.have you been loosing power when driving.
Let me know the answers to all above. RON

Posted on Nov 15, 2009

  • Zechariah Bigley
    Zechariah Bigley Jan 12, 2014

    Yeah, I'm having that same problem with my 2004 Mazda Rx-8....There is water or coolant in the oil because when I check the oil it is on the dipstick, and as far as the car it seemed to be really hot the other day when I was driving it. I originally thought it was the battery because my car is losing power and it keeps dying when I make frequent stops. If I make more than one trip it will die and I have to restart it, but I haven't seen any noticeable white smoke and I'm not driving it now, but it is causing it to lose power. Mainly it won't hold a charge and I have to rev my engine and keep the RPM's up so it won't die when I was driving it. It has a hard time starting once I stop and start it up again....Not sure how far along the damage is and what to do since apparently the milky discharge causes the seals to blow. From what I have gathered so far is that Mazda doesn't offer a rebuild kit and the only other thing to do is buy a new engine? What should I do?....All advice is appreciated!

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