father/sons restoration
i posted a few weeks ago. my sons brought me home an 84 GS project. Motor and tranny out, motor in its individual parts. I have outsourced some good used rotor housings from a forum member and have gotten a new rotor. the plan is to rebuild the motor over the winter here in michigan. My question is should i tear the transmission down and pull out all the parts? the car was running until the previous owner blew an apex seal which destoryed the rotor housing. why he pulled out the transmission i dont know. just looking for some insight as to weather or not i should rip the transmission down to the gears.
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Other then replacing the front trans seal, I wouldn't worry about the trans yet.
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Thanks ill look into changing that seal.
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Also are 12a rotors front or rear specific? I bought a good used rotor but forgot to check if I needed the front or rear.
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Started
Today I cleaned the flywheel, clutch plate and one rotor. How do they look
https://cimg2.ibsrv.net/gimg/www.rx7...4d033e136b.jpg Flywheel was all rusty. https://cimg3.ibsrv.net/gimg/www.rx7...8c03fc1ba3.jpg https://cimg5.ibsrv.net/gimg/www.rx7...556eaa3929.jpg Rotor is in pretty decent shape https://cimg6.ibsrv.net/gimg/www.rx7...d073ea6530.jpg Got most of the carbon off, need to hit it with a scrub pad and some simple green https://cimg7.ibsrv.net/gimg/www.rx7...35d58b2886.jpg Clutch plate might need replacing have some more cleaning to do.on it |
There are letters stamped in the well of each rotor. 83-85 will have "F" for front and "R" for rear along with an "N". All other 12A rotors will only have the "F" and "R".
You really want to rotors to be close in weight. Not sure of the tolerance right of hand. This thread might help: https://www.rx7club.com/1st-generati...ights-1058848/ And this: https://mazdatrix.com/rotor-weight-a...ression-chart/ |
Rotors
What does the N stand for? I have one rotor from.my engine and one from another? Is that going to be a problem?
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Originally Posted by Paulieboy72
(Post 12577468)
What does the N stand for? I have one rotor from.my engine and one from another? Is that going to be a problem?
My first instinct has NA (Normally Aspirated) because the turbo has TF and TR. The US never got a first gen turbo. |
Rotor housings
I would like to purchase theae used housings but I'm not sure what these cutouts are for and why?
https://cimg8.ibsrv.net/gimg/www.rx7...e354a3014.jpeg https://cimg9.ibsrv.net/gimg/www.rx7...c869ba79e.jpeg |
Those cutouts are for a large bridge port or j-port.
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Cutouta
Are they usable for a stock 12A?
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Originally Posted by paulieboy72
(Post 12577780)
are they usable for a stock 12a?
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Originally Posted by KansasCityREPU
(Post 12577783)
No. I thought you already found some housings?
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Body side moulding
What do I use reattach body side molding to ou r project?
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Originally Posted by Paulieboy72
(Post 12578510)
What do I use reattach body side molding to ou r project?
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Moulding
Lol, I'm actually missing the pass rear quarter moulding. Know of any?
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Originally Posted by Paulieboy72
(Post 12578571)
Lol, I'm actually missing the pass rear quarter moulding. Know of any?
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Thank you. Payment would have to be afywr I pay you for the housings
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Originally Posted by Paulieboy72
(Post 12578660)
Thank you. Payment would have to be afywr I pay you for the housings
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Sounds good.
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intake manifold mod
what should i do to the stock intake manifold as far as mods, do i open up the ports a bit for better breathing? i want to put a custom exhaust on but not sure i want to spend 1000 dollars on a RB full header exhaust
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Originally Posted by Paulieboy72
(Post 12578755)
what should i do to the stock intake manifold as far as mods, do i open up the ports a bit for better breathing? i want to put a custom exhaust on but not sure i want to spend 1000 dollars on a RB full header exhaust
I'm not sure of Michigan has exhaust inspections. |
bolts
the previous owner tore down the 12A . have all the parts except most of the bolts. we have the engine bolts to hold it together but we are missing the bolts for the stationary gears and oil pan and most of the other bolts needed such as the bolts to mate the transmission to the engine, bolts for the alternator, beehive oil pump, bolts for the water pump housing. does anyone know what size all these are and can i just go to the hardware store and get them.?
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thanks. what is the ACV? I did see a plate on the intake manifold. maybe he did it already? where do these freeze plugs go in the irons? im not planning on running it in the winter daily. mostly summer driver fun car. the current exhaust is shot. what do i need to make it whole again.? header, presilensor, and muffler like a borla or flowmaster? the previous owner did buy blue silicone caps as i think he was starting to do the rats nest delete.
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Originally Posted by Paulieboy72
(Post 12578784)
thanks. what is the ACV? I did see a plate on the intake manifold. maybe he did it already? where do these freeze plugs go in the irons? im not planning on running it in the winter daily. mostly summer driver fun car. the current exhaust is shot. what do i need to make it whole again.? header, presilensor, and muffler like a borla or flowmaster? the previous owner did buy blue silicone caps as i think he was starting to do the rats nest delete.
Here is a writeup on the freeze plugs. https://www.rx7club.com/1st-gen-arch.../#&gid=1&pid=5 The ACV block-off plate is shown in this pic from that same thread, https://cimg0.ibsrv.net/gimg/www.rx7...668678f599.jpg |
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