2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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REX Rebuild

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Old 03-23-10, 06:36 AM
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Originally Posted by FelixIsGod29X
Rotor bearings/ Stat bearings have to go through MANY heat cycles before they are worn in properly. It actually takes longer for the bearings to wear in than it does for the apex seals. I think if there is more than 30% copper showing then they should be replaced. Thats what i heard a few times. If its barely any showing then you can reuse them no problem IMHO.

Post pics of the bearings for us.
ill try to get some pics up tomorrow
Old 03-23-10, 01:36 PM
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can you tell what some of the parts and sensors are by looking at them?

1- upper right has to sensors. thos tps? ------ YES TPS
2- theres some stuck side seals that i cant get out... any ideas?- Spackle knife, make a "C"
cut to the spackle knife, then you can hook it under the seals and pop them out
3-on the red piece theres a sensor. - Air intake sensor i bet
4-
5- whats the plate blocking?- Not sure
6-
7-thats the from oil regulator right? isn't there sposed to be a peace coming out of the left side? looks like the might of cut it off--- I dont recall seeing these before
8-
9-
sorry for suck a pain in the rear end..
Old 03-24-10, 06:19 AM
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anyone?
Old 03-25-10, 06:20 AM
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Old 03-29-10, 05:06 AM
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Originally Posted by FelixIsGod29X
can you tell what some of the parts and sensors are by looking at them?

1- upper right has to sensors. thos tps? ------ YES TPS
2- theres some stuck side seals that i cant get out... any ideas?- Spackle knife, make a "C"
cut to the spackle knife, then you can hook it under the seals and pop them out
3-on the red piece theres a sensor. - Air intake sensor i bet
4-
5- whats the plate blocking?- Not sure
6-
7-thats the from oil regulator right? isn't there sposed to be a peace coming out of the left side? looks like the might of cut it off--- I dont recall seeing these before
8-
9-
sorry for suck a pain in the rear end..
my bad didnt see the second page
thanks for the tips
Old 03-29-10, 12:42 PM
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It looks like your AIT sensor on the 3rd pic is missing a prong. There should be 2
Old 03-29-10, 01:43 PM
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1- upper right has to sensors. thos tps? ------ YES TPS
2- theres some stuck side seals that i cant get out... any ideas?- Spackle knife, make a "C"
cut to the spackle knife, then you can hook it under the seals and pop them out
3-on the red piece theres a sensor. - Air intake sensor i bet
4-???
5- whats the plate blocking?- Not sure (blocked off on mine too)
6- thermopellet goes in the front of the eccentric shaft
7-thats the from oil regulator right? isn't there sposed to be a peace coming out of the left side? looks like the might of cut it off--- I dont recall seeing these before (me either)
8- top mount intercooler bracket
9- some sort of other bracket??
Old 03-30-10, 06:49 AM
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Originally Posted by Nick_d_TII
1- upper right has to sensors. thos tps? ------ YES TPS
2- theres some stuck side seals that i cant get out... any ideas?- Spackle knife, make a "C"
cut to the spackle knife, then you can hook it under the seals and pop them out
3-on the red piece theres a sensor. - Air intake sensor i bet
4-???
5- whats the plate blocking?- Not sure (blocked off on mine too)
6- thermopellet goes in the front of the eccentric shaft
7-thats the from oil regulator right? isn't there sposed to be a peace coming out of the left side? looks like the might of cut it off--- I dont recall seeing these before (me either)
8- top mount intercooler bracket
9- some sort of other bracket??
nice, thanks dude
Old 03-30-10, 06:52 AM
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Originally Posted by younG_Gunner
It looks like your AIT sensor on the 3rd pic is missing a prong. There should be 2
really now? ill look in to that one
thanks
Old 03-30-10, 04:13 PM
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mazdatrix.com part# 18-8450-N326
Old 10-14-10, 05:17 AM
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just a little update on some progress that ive made over the last couple of weeks. sorry most of the pics were taking at night, sens thats when i worked on it( not the best pics).

note that im no pro builder, not only is this the first engine ive ever rebuild, but its a rotory (19 years young) . so please take it easy on the comments.

i perty much started out by ordering some seals and gaskets from Atkins and a couple other things from ebay, most of the stuff is new but not all. i was kinda on a budget. i ordered:

13B 86-95 Side Seal Set
86-95 Side Seal Spring Set
Atkins 13B 2mm Apex Seal Set
93-95 Corner Seal Spring Set
Oil Ring Spring Set
86-2009 13B 2mm Rx7 & Rx8 Apex Seal Spring Set
86-95 O-Ring Kit
Atkins' Thermal Pellet
Oil Filter
4oz Gasgacinch Gasket Sealer (not sure why i got that)















Old 10-14-10, 05:20 AM
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next up i we to eBay and garbed some corner seals and oil control seals. new they would of ran me about 350 extra so i decided to get some used ones.
they looked to be in good some so i used them...
i gave them a cleaning.

<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0110.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0110.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0111.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0111.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0112.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0112.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0115.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0115.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0124.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0124.jpg" border="0" alt="Photobucket"></a>
Old 10-14-10, 05:21 AM
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also for the side oil seas the wear mark was with in spec, other reason why i used them.
Old 10-14-10, 05:34 AM
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after that i turned to the irons. i took them down to pine apple racing (awesome place, robs the man! lots of help and info) he said they plates were about half way worn, (if that makes sens), that they were with in specs and they were ok to use in a rebuild so i did. i did some reading on "lapping" the plates with some sand paper, so thats what i did. i started off with some 150 with a DA. i went about 10 min then switched discs about half way through using a two discs for side. at first i was kinda scared of hurting the plates, but it takes a while to see some changed. i did not try to get rid of all the previous wear marks from the oil control seals, just kinda scuff it a bit. sanding in a figure 8 pattern trying to keep the DA moving at a constant smooth rate. after i went another 10 min with some 380 grit. took about 1 hour or so tottal. the whole point was to help with the oil rentenation or how ever you call it. kinda hard to notice when i switched.

<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0174.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0174.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0174.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0174.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0176.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0176.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0177.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0177.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0178.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0178.jpg" border="0" alt="Photobucket"></a>
<a href="http://s198.photobucket.com/albums/aa123/JDMeg611/Rex/?action=view&current=IMAG0179.jpg" target="_blank"><img src="http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMAG0179.jpg" border="0" alt="Photobucket"></a>





Old 10-14-10, 05:35 AM
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Wow... Those rotors had some crazy buildup to be low mileage. Anyone else notice the large amounts of rust built up on the housings too? When my old S5 block was torn apart it didn't look that bad, it was a low mileage motor. 65k.
Old 10-14-10, 05:35 AM
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Old 10-14-10, 05:39 AM
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Originally Posted by bunnybunny
Wow... Those rotors had some crazy buildup to be low mileage. Anyone else notice the large amounts of rust built up on the housings too? When my old S5 block was torn apart it didn't look that bad, it was a low mileage motor. 65k.
yea your right, after getting in to it and looking at the parts there is some wear on them. the plates have bin sitting for a while so im sure that didint help as far as the rust goes. i should of keepet everything old up
Old 10-14-10, 05:46 AM
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Originally Posted by shocker003
yea your right, after getting in to it and looking at the parts there is some wear on them. the plates have bin sitting for a while so im sure that didint help as far as the rust goes. i should of keepet everything old up
Like everyone said, check and double check your clearances. Looks like it sat with water in it for a while.

Just make sure to get the bits of rust and metal dust from the lapping out, should be good.

I like a build with a lot of pics.
Old 10-14-10, 05:51 AM
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Originally Posted by bunnybunny
Like everyone said, check and double check your clearances. Looks like it sat with water in it for a while.

Just make sure to get the bits of rust and metal dust from the lapping out, should be good.

I like a build with a lot of pics.
yesir, i tryed to make sure everything was with in spec, replaced what ever i could. and i used the air hose to blow them off after and well as pressure washed. ill get more pics up soon, kinda tired as of right now. i was talking loots of pics at the beginning of the build but kinda got lazy.
Old 10-14-10, 08:23 AM
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so in refrence to ur first post in this thread. since its an s5 and is left hand drive it should have came with a n370 stock. jdm had n374's the jdm computer will plug right in but won't work without being chipped 1st. rear rotor won't fire and such.
Old 10-14-10, 03:43 PM
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Originally Posted by durtled
so in refrence to ur first post in this thread. since its an s5 and is left hand drive it should have came with a n370 stock. jdm had n374's the jdm computer will plug right in but won't work without being chipped 1st. rear rotor won't fire and such.
so your not saying its jdm?
Old 10-14-10, 06:04 PM
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Originally Posted by shocker003
i did some reading on "lapping" the plates with some sand paper...
Just call it "sanding" or "cleaning up" because that process ain't "lapping" by any stretch of the term.
Old 10-14-10, 11:42 PM
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Originally Posted by clokker
Just call it "sanding" or "cleaning up" because that process ain't "lapping" by any stretch of the term.
+1

You should probably recheck the irons for flatness. A DA may give you a smooth finish, but it isn't necessarily flat.
Old 10-18-10, 04:33 AM
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here are some pics of the porting process. didn't really try to remove too much material, i kinda wanted to keep it some what stock sens its my first build. first i used some kind of a metal grinder a friend of mine let me use. after that i used a stone and then sand pappier. over all i think ti turned out perty good. kind of a long process, pain in the a. as you can see on a couple of the pics the grinder slipped and i made contact with the face of the iron, ouch. again sorry the pics are dark and not so clear.










[IMG]http://i198.photobucket.com/albums/aa123/JDMeg611/Rex/IMG_20101002_2
Old 10-18-10, 04:34 AM
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00258-1.jpg[/IMG]










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