flyrotary@lancaironline.net Mailing List Archive

If you take off the oil pan, get the RX7 oil pressure regulator and bring that psi back to 100psi where it belongs. The first gen (2004-2008) of RX8 messed up and went with lower oil pressure (80psi). They fixed that in the second generation, but an easy mod is to just get the RX7 reg.

http://mazparts.com/en/rx8-remedy-oil-pressure-kit-04-08

-Matt Boiteau

- Matt

On Fri, Jan 15, 2016 at 12:13 AM, Charlie England <flyrotary@lancaironline.net> wrote:

On January 14, 2016 10:19:37 PM CST, Dennis Havarlah <flyrotary@lancaironline.net> wrote:

I am seeing a decrease in engine oil pressure! About to stop flying and start tearing the engine down.

More information:

RX8 Renesis 4 port in RV-7A. 670 total hours in flight. I fly at least 4 times a week. Mostly very short flights - 8 to 10 minutes each way to play tennis. I use Mobil 1 oil (15 - 50 W). I change oil at 50 hours. Check oil filter media for particles each time. Burn regular mogas with ethanol and add 0.6 oz/gal oil ( 2 stroke outboard and marvel mixed ).

Over the past 100 hours my oil pressure has slowly decreased from 80 psi to as low as 72 psi in cruse. Oil temps are about 180 deg. F. Idle oil pressure is 50 - 53 psi at 1500 engine rpm when I land.

When I inspect the oil filter media I find only a very few shinny particles on the oil filter media and have not seen an increase in number. I have to look win direct sunlight to see them.

Is there anything I should be looking at - oil pump, oil pressure regulator - ???

I'm contemplating taking off the oil pan this weekend. My oil and water radiators are mounted under the engine so this will take some time and be messy!

Thanks for any and all info.

Dennis Haverlah

Any way to verify gauge accuracy before taking things apart?
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