Hey guys,

I tore apart my jdm S5 motor to freshen it up and found out it had 3mm seals in it.
I have a set of RA 3mm Super seals on their way.
but i need to order new 3mm solid corner seals and the single apex seal spring from mazda .

I was looking through the first gen parts fische and i just want to make sure I have the right part numbers, I just dont want to order the wrong parts and I dont think they will be much help.

I think i have to get the gsl-se 13 springs the part number is 1757-11-304 do these have 3mm solid corner seals????

and would the corner seals for the 13b gsl-se be 3mm solid corner seals or which model should i look for????
thanks for the help,

 

I've always seen the corner seals for a 3mm 13b apex seal rotor to have the rubber insert. It helps with starting. Why do you need solid corner seals? 13b gsl-se used 3mm apex seals and the corner seals have the appropriate 3mm groove. You have the right part number for the apex seal springs.

This is from MazdaComp directly:

The following parts are recommended for all 1976-85 13B rebuilds. Certain upgraded parts have been substituted, but may not be stock. These are the parts normally sent out when people want to order a basic rebuild kit.


DESCRIPTION PART NUMBER QTY NOTES
APEX SEAL - STOCK N304-11-300 6 Click here for optional Apex Seals & Springs
APEX SPRING 1757-11-304 6
CORNER SEAL N225-11-321 12
CORNER SEAL SPRING NF01-11-C24 12 Washer type spring from 93-95 RX-7. Retains strength under high temperatures better than wire type design.
CORNER SEAL PLUG N201-11-322 12
SIDE SEAL 8871-23-151 12 Precut
SIDE SEAL SPRING 0820-11-317 12
OIL SEAL SET (STEEL) 8871-23-180 4 1 set is 1 inner and 1 outer. Needs 4 sets per engine.
O-RING - OIL SEAL OUTER 0820-11-341 4 Green
O-RING - OIL SEAL INNER 1202-11-343 4 Green - do not use 8341-11-343 black o-rings.
SPRING - OIL SEAL FRONT INNER N225-11-351 2
SPRING - OIL SEAL REAR INNER N225-11-361 2
SPRING - OIL SEAL FRONT OUTER 4352-11-353 2 Competition part. Heavy-duty spring provides increased pressure
SPRING - OIL SEAL REAR OUTER 4352-11-363 2 Competition part. Heavy-duty spring provides increased pressure
ENGINE GASKET SET N304-99-100A 1 84-85 set.
MAIN SEAL, FRONT 0820-10-605 1
MAIN SEAL, REAR 1668-10-556A 1
PILOT BEARING N326-11-D03 1
PILOT BEARING SEAL 1881-11-404 1

 

thanks, my engine had the solid 3mm corner seals????

we're they ever availible on any models, or maybe they machined the 3rd gen ones

 

Early 13b's (pre-'76) used solid corner seals. Many people like them (I have them in my engine). One nice thing is there is no rubber inserts to lose.

Check out Mazdatrix:

http://www.mazdatrix.com/b3.htm

The part numbers at Mazdatrix are similar to what Mazda uses (in case you are looking to get from Mazda). They do swap numbers around and sometimes have an extra digit.

For instance, the corner seals that require the insert:

Mazdatrix: 11-3210-N225
Mazda: N225-11-321

 

so just pre 76 12a's have solid corner seals?

i want to try t get this stuff from the dealer, im paying enough for shipping and duty on all my other parts

 

so i guess a 1974 RX-4 13b should have the solid 3mm corner seals?

 

Atkins sell the 3mm solid corner seals. Upgrade to the FD/3rd gen corner seal springs while you're ordering parts from them.

 

Like I said, you only have to flip the Mazdatrix part numbers around to get the Mazda number:

1011-11-321 would be the part # from Mazda for the solid corner seals

NF01-11-C24 for the FD corner seal springs

You would need 12 of each of these.

 

thanks guys

I have the FD corner seal springs , i thought i had everything i needed to rebuild my engine till i opened her up and there was 3mm apex seals and 3mm solid corner seals in a jspec S5 TII engine

they have parts fiche for all 3 gens if you cant find a part number on mazdatrix...its what i use usually.
in the manuals pdf section http://www.rotaryheads.com/

 

Atkins is the only one I know of that makes the solid corners seals any more. They have been doing so for quite a few years. On a side note this will probably stir up alot of crap but I won't ever use RA apex seals I know that they are cheap and lots of people seem to think they are good but they will destroy your rotor housings they are too hard

 

pre 76 13b's had solid 3mm corner seals

got them everything ordered

do you ave any personal experience with them destroying your housings?

 

The RA super seals might actually be too abrasive, causing housing wear.

Ceramics are very hard and seem to last forever in an NA environment (with good tuning).

As for the solid corner seals, I think of them as being '74-'75 because I hate using negative language to describe things ie pre '76 spec ports or pre '86 GSL-SE.

Solid corner seals don't destroy housings until they crack along the sharp 90° slotted inner edge due to detonation. Atkins' corner seals have a rounded slot and less surface contact for cooler running and less chance for cracking under boost conditions.