1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

8512a Oil cooler leak.

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Old 06-14-10, 08:47 PM
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8512a Oil cooler leak.

I have a leak coming from under the oil cooler. not sure exsactly where. but plan is to take it apart clean every thing. replace hoses if i need to.

What else is needed . not sure About orings or not or where to find them.

Any other info on this would be appreciated.

The oil like to sit on my mazda logo and work its way down my motor.

Old 06-14-10, 09:18 PM
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There is two o-rings for the oil pedestal mount. These two rings also work to replace the rings in the oil cooler to pedestal.
Old 06-14-10, 09:43 PM
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there are a total of four o-rings on the oil cooler. two that mount the unit and pedestal to the engine and two between the oil cooler and the pedestal. the two between the pedestal and the engine commonly fail. here's what you will see when replacing the o-rings. use ONLY mazda oem o-rings:

Old 06-14-10, 10:12 PM
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Thanks alot that is alot of help right there. Dealer sell these orings?
Old 06-15-10, 01:04 AM
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Found the Orings From Atkins. anything else i should look at before i cut in to it.
Old 06-15-10, 04:48 AM
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Yes, you will need to replace all of the hoses located below the cooler. Once they get contaminated with oil, they begin to break down. Eventually, they will blow and leave you stranded, or even worse with an overheated/blown engine.

This was the first project I ever undertook on my car after purchase. Getting to the (17mm?) bolt on the backside of the cooler is the toughest part.

Good luck.





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Old 06-15-10, 09:08 AM
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Cool thank you. Ordering the 2 hoses and orings from atkins.
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