Jspec housing?.. what year?... any info would be much appreciated. Seem to be identical minus the toyo stamp and the "guarantee void if removed" bit. Thanks in advance

 

That's usually indicative of a rebuilder such as Hayes. I believe he actually put his melt away buttons right there as well, though it makes sense so more people probably have as well.

 

I've seen those melt away tabs on junkyard engines that come with a warranty as well. Could have been there a long time. Odd that the coolant passages for the intake manifold are blocked off. Are they blocked off with freeze plugs or factory cast there? Appears that the engine has threads for oil injectors so we know that they are 84 and up.

 

is that something that melts away if the engine is overheated? only 1st gen and earlier experience and never seen this on anything pre '86. and i'm guessing those don't have the O-ring grooves in them.

it definitely looks like the coolant passages being blocked is in the casting.

 

those look like GSL-SE housings (or 929-Luce), but the water O rings need to be in the housing.

the thing between the spark plugs is from a junkyard, if the engine overheats they come off and you void your warranty

 

My 13B has the same "not drilled out" water ports. I was told they were GSL-SE housings. They aren't plugged with anything, they just haven't been machined out for use.
(motor made with SE housings and 12A irons to replicate the '70's 4-port 13B's)

 

I have a couple spare GSL-SE housings. I'll check them and see if they are similar to yours.

 

These are fresh out of the box GSL-SE housings. Last photo is with an S4 housing. Hope that helps.

 

So, regarding the water ports, it looks like EFI 13B motors dont flow coolant to the intake there like the 12A motors. To be clear, did the early carbed 13B in the '70's (REPU, RX3/4, etc.) use the water ports?

 

yes they did. coolant flowed thru the intake.

 

Thanks Rxtasy3. So one way to identify the early 13Bs' housings would be open water ports. Learning is fun.

 

if the gslse housings did have those posts blocked then it goes back to what i mentioned earlier. do these housings have the O ring grooves in them? if so, 84-85 SE housings. if not, 86+.

 

Hmm, both mine and J_tso's are (supposedly) -SE, but don't have the grooves. I would think that if they didnt machine out /cast the openings they wouldn't bother with the o-ring grooves either.
Learning is confusing.

 

those O ring grooves that seal the rotor housing to the plates were machined into the plates from 86 on. those j_tso posted has the grooves in them making them 84-85 SE.

 

I think by groove he means the O-ring seat for the intake manifold.

 

Yeah that's what I thought we were talking about. My housings and yours (j_tso) are from GSL-SE motors, and do not have open water ports or "O-Ring seals". I think that EFI motors, including the 84-85 -SE 13B, have as-cast blocked water ports and no O-ring recess.
I think that rxtasy3 is saying the GSL-SE has o-ring grooves, but blocked ports.
I think that it's getting late and this is getting more confusing than it should be.

 

i'm not talking about the O ring that seals the coolant passage between the intake and side of rotor housing. that port is blocked so no need for that O ring. i'm talking about the sealing surfaces between the side of the rotor housing and the face of the plates. maybe my terminology is all wrong.

 

Ah-ha, I understand you now rxtasy3. When you mentioned the o-rings in post #4 I only thought of the intake. Sorry for my confusion - been a long busy day.

So, can the OP show us the housing-to-plate surface to help identify them.......

 

those are minty fresh! the QR code under the spark plugs means it was made after the start of Rx8 production

 

Alright - how much do NEW GSL-SE Rotor Housings cost these days? I'm hiding my wallet in the other room... Tell me...

 

Mazdacomp is 414.74 each, plus tax, and shipping...

 

The QR codes threw me off because it still has the "Licensed by NSU" cast into it which later cars don't have.

I paid $464 each. It pays to shop around because those came from *** Mazda dealer in Florida whereas my local Austin dealer lists them for $671.