2009 has arrived in Phoenix! - Page 2

06-03-2008, 11:13 PM

#27

ASH8

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Quote:

Originally Posted by moby1325

thanks to Ash8 for the reply on the oil metering system, does it still use the motor oil from the crankcase? Why did some motors fail due to oil starvation and why the comment from the rebuild shop guy about seeing motors come back so full of carbon that you could not remove the seals from the rotors. I don't remember the post but he had pictures of an anniversary model inside the new rebuild plant.

Yes, the new EOMS (Electronic Oil Metering System) still uses crankcase oil, however, it will be delivered in a more precise manner
by the engines PCM (ECU).

IMO. First, if you get jammed side or apex seals in a rotor the reasons are possibly 3 fold.
1. Engine has suffered extreme heat stress.
2. Insufficient oil metered to lubricate seals.
3. High Carbon build up.

I believe it is a combination of all 3, I said in posts years ago that I was concerned about the air flow from the front nose panel as the openings are small, then some owners fitted after market grilles to prevent stone damage to oil cooler/condenser/radiator.
Again this can restrict air flow further.

Carbon will always be there ,but, much can be related to the type of gas used (high octane is recommended) along with poor lubrication.
Also many owners trying to drive economically is not good for any rotary, a red-line a day blows the carbon away..so to speak.
Those who drive constantly under 4000 RPM are looking for trouble.

IMO Mazda have addressed all these issues with the new 09 model.
1. Larger air intakes.
2. EOMS
3. Larger oil pump and crankcase.
4. Rumored changes to the water pump and radiator.

Along with all the 04-08 PCM Flash upgrades over the years also controlling electric cooling fan cut in and out temperatures, engine timing/tune, even spark plug changes.

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