olddragger

iTrader: (3)

Has anyone with the s2 model been monitoring engine temps?
If so-I am interested in what they are?
Thanks
OD

ASH8

Did last summer...Coolant Temps that is via OBDII....

Can't see there would be much difference OD, the Only real changes were a slightly larger coolant capacity of about 200 Mil (less than a cup), the main difference is the S2 has an extra Cooling Fan Speed., Oh and the Revised Water Pump with Plastic Impeller and O ring Gasket.
Changed electric Fan Motors both are S2 exclusive and the same each side. Water Pump Pulley has changed (part # wise) as has both Ribbed Belts.

Apart from that everything else is the same..
Thermostat, Fans, Hoses, Air Con Condenser.

olddragger

iTrader: (3)

thats my point--has it made any difference?
Engine temps have been thought to contribute to premature engine failure.
So far I have not heard of any s2 engine problems?
I am wondering if it is running cooler?
OD

jasonrxeight

doubt it if thermostat is the same, should be running same temperature.

SpencerM1

iTrader: (1)

the a/c compressor is different. Also, I did read that the SII ran 3-4*c cooler

ASH8

Ah, NO the Air Conditioner Compressor is the same for ALL series (they do not come with Magnetic Clutch Attached)...

The Separate Magnetic Clutch was changed on Series 1 Very Early at August 2,2003 Production.

After that date the Magnetic Clutch is the same for S1 and S2.

What did change for S2 was the Under Dash "Amplifier" or Air Conditioner Thermostat for Clutch ON and OFF.

ASH8

For memory last summer when I did my Monitoring in 33-35C outside Summer Temps.

The Thermostat Opened at about 86C, and Maintained between 82 and 84C, which is the same as my sisters 2006 KIA Cerato 2.0L according to her OBDII and my Reader.

While waiting at stop lights (for memory) engine temps went as high as 98C and quickly came down to the 84C Temp.

Having not owned a Series 1, I cant compare for you.

As I said the Thermostat is the same as S1.

Edit: Engine Failures in S2???, IMO it is still too early to call, they are only 2 years old, plus there are far fewer S2's Sold in USA and Worldwide.

Here are the Fan Temps ON-OFF and Speed data from Mazda Factory Service S2.

olddragger

iTrader: (3)

great info Ash---thanks.
To me and what I have seen--it seems the S2's are running cooler than the S1's.
It is not unusual for a S1 in 95F ambient to get to 220F in traffic. To stay at 180-190F is not typical of the oem S1 at all.
Seems that the changes they made are working. Especially the fans?
OD

SpencerM1

iTrader: (1)

This is what I was told after mine was replaced due to a faulty bearing in the pulley. Different part # and different manuf. of the a/c compressor. Outside of that situation I don't pay much attention to the specifics of the clutch on my a/c compressor nor any changes pre-09' so I can't speak to that. I know it helps make air cold...

ASH8

Sorry, but unless your car was made in 2003 between April (start of RX-8 production) and August 2003, then you were not told the truth...as there is NO Difference with Air Conditioner Compressors or Clutches, that is for 2004,2005,2006,2007,2008,2009,2010....they are all the same.

Compressors for these RX-8's are DENSO brand and exactly the same.

http://www.trademotion.com/partlocat...&siteid=214264

Put in this part number..F15161K00A Comp, and F15161L10B Clutch
And read the models and production dates if you do not believe me.

olddragger

iTrader: (3)

Oh Ash--the ect sensor position didnt change, did it?
thanks Mate.
OD

tcole6

I have an '04 touring built Nov '03. Either my temp gauge is broken, or I have not seen this issue. I drive on the Blue Route in Pennsylvania which means I sit in traffic pretty much every day. My temperatute gauge did not even go to 200F even with our extremely hot summer.

I guess I have the only S1 that doesn't do that.

ASH8

no.
Sensor same, position same..

shaunv74

There was an updated part called an "air conditioner amplifier" put in some time in '05 IIRC. It was to remedy the weak AC problem that us whiney US folks complained about. I don't know how it worked. Maybe allowed you to go to 11 or something.

SpencerM1

iTrader: (1)

Well there we have it. Just saying what i was told, which was obviously untrue. Not a big surprise as the words douche and bag have come up when dealing with my service people. I swear, if they say the phrase "don't worry its under warranty" you will see me on the local news...

ASH8, I've read you posts on other threads and I know you know your stuff. Perhaps you could come state side and school my Mazda people.

ASH8

Understood, yeah, I guess if Dealer Principals paid more for their good parts staff, they would retain them longer in the industry..

But, yeah, when it comes to service, they get told crap too sometimes that gets past on...it happens in EVERY car brand.

Franchise Parts guys have to deal with far more issues than the "average" performance shop who specializes in a few areas or a few parts...that is VERY EASY.

When you are dealing with over 100,000 different parts in a manufacturers "Range" of cars that get replaced every 3 to 4 years or so, there is a lot to know.

Computers are wonderful, compared to Books, Fiche and Kalamazoo Kardex Systems.

Happy to assist anyone "if" I can, and I am NOT always correct, but generally I look at the info more than once to make sure..

Sometimes, things get lost between interpretation.

And then you get the Smart *** owners who get enjoyment of being a **** Head.

It is all good.

olddragger

iTrader: (3)

Well I get my "low flood" 09 Rx8 R3 in tomorrow. It has 9K on it.
Remote works and all dash lights work---yea.
I may be throwing more ? out later--thanks guys
OD

ASH8

GREAT Denny....

What are you thinking of doing??, dismantling the S2 and use parts on your S1, or the other way around...try and get the S2 going???..Dunno...sorry..

Try the Cooling Fan swap, S2 motors are larger and both the same, fan blades are the same as S1, you have to also use the S2 fan motor mounting frame (because Fan bodies are wider/larger).
It should fit.

I know the S2 fan motors have a 4 pin male with a short 6 inch loom, I think S1's the loom plugs straight into motors, so you may have to mod wiring.

You could also change over the other 5 blade fan to a 7 blader, so both are 7 blade fans.

Looks like you have some "fun" ahead OD...

olddragger

iTrader: (3)

Thanks mate!
Its too nice of a car to part out. I am going to restore it and if my heart will let me--sell it to further fund my adventure. If they could do an FI system for the 09--i would keep it.
OD

Mazmart

iTrader: (12)

Ah, Denny! I heard rumors about this. Sounds exciting.

Paul.

ASH8

I bet you keep the R3!!..

Here OD, just for you, these 3 pics are of one of two S2 EMOP, this is the First Pump where engine Oil via OCV and Direct from Oil Pump enters.

As you can see there are 2 smaller threaded outlets each side of silver/alloy body where metal tubed banjo lines go to the Oil Injector Nozzles.

This EMOP does the original 4 outer nozzles on Rotor Housings.

Other large barb pipe is Oil Supply to the other slightly smaller EMOP which feeds the two middle Oil Injectors, also on this pump the Engines ONLY Oil Pressure Sensor switch is located, so if pressure fails here warning light and buzzer sounds.

Note the large Black Solenoid on top which opens gates to allow pressurized Engine Oil through to Nozzles, so as I said originally these New EMOP's do not PUMP they are a gateway that allows Oil to flow from main engine Oil Pump.

Oil Pressure is maintained constantly between 7 and 20 PSI inside EMOP's.

Excess Oil or overflow from the other EMOP returns back to oil filler pipe.

ASH8

Here are the S2 Fan Motors..

There are 2 identical Motors (N3R1-15-150) used, unlike S1 with two different ones.
The S2 motors are also larger in diameter.