My pics are of various coolers from differing years.

Paul

The second one is 2nd gen FC.

Paul.

The FC is the long single skinny cooler N326-14-700A ...yes?
Same oil cooler for all FC's.

Would like to see an RX-8 one cracked open Paul.

Here's the EPC diagram for the FC showing the thermo pellet.

Paul.

I'm sure I have a damaged one we can do. I'll also check my 09 stuff as well.

Paul.

Great, Thanks Paul, yes I agree on the FC having a Thermo Pellet in it's oil cooler, would be great to see an RX-8 one, BUT the EPC does not show any separate parts breakdown like the FC has.

Here is the FC Part Numbers
8871-14-810 Thermo Pellet
1757-14-821 Spring

I can tell you that from the parts model codes (front 4 numbers) the pellet
8871 is from Series I RX-7, and the 1757 spring is from the original 1974 13B RX-4.

I guess the RX-8 OC thermostat is in this location..

https://www.rx8club.com/attachment.p...1&d=1249501525

maybe that could be used for a drain plug too?
OD

Great to use as a cooler drain spot, but I am pretty sure the RX-8's don't have this removable bolt, the parts pic above does not show one and I don't recall seeing one on mine, you could always undo the oil cooler hose OD to drain mate.??

Correction, gee I am an old stupid BASTARD at times, yes there plainly is a bolt head there??? Derrr DUMB aren't I, a senior moment.

So yes, OD perhaps this is a drain point...MMMmm will have to investigate...

Sorry Dudes..

WOW...
$87.03 US for the 8871 Pellet and $2.81 for the 1757 Spring, is it GOLD Plated or something.

8871-14-810 Thermo Pellet
1757-14-821 Spring

This is the access point to the thermostat as Mr Engman reminded me last night. That's how we modify them on the FD and FE (SE3P). The design is a bit different as the bolt head will not separate from the thermostat.

Paul.

Here's what it looks like inside boys and girls:

Paul.

Paul is that thermostat unit able to be replaced without buying a whole new cooler? That would certainly be a cake install!

well looks like a good drain spot and it appears to be on the passenger side?
Good info guys--great job--Paul you are the man! Ash you aint bad yourself mate.:)
olddragger

Or modified as we do. The problem is Mazda does not sell the thermostat by itself so no part number exists just as Ash pointed out.

Paul.

Thanks Denny.

Paul.

So that is on the passenger side right? Is there a downside to constantly removing and reinstalling that bolt/thermostat?

You will be surprised at how little oil you will get out by draining the coolers.

I opened both and cleaned out the lines with an air nozzle...and got maybe an extra 1/2 - 3/4 quart for about 1/2 hours work......

Just not worth it in the big picture :)

Oh, well scratch that then.

Okay, does anyone know what size the oil cooler line fittings are? Does anyone have a full diagram of the stock oil cooler system?

I used -10AN lines for all my oil lines...Not sure if that helps :)

So you ditched the factory lines for an fittings and aftermarket lines?

It's kinda in progress..I did it with stock coolers and new lines...but now I'm redoing the front with the new nose..and will put in larger cooler with fans when I do that

Are you going with one large single cooler?

Nope...2 approx. 11X10" with fans :) Just have to find the right units