Dlbgirl

iTrader: (1)

I bought an engine missing the CAS, but I have a spare-How can I set the timing? (I searched without luck) The engine is ready to go in, and I wonder about the CAS position and if I can set the timing without a light.

Scott 89t2

you need a timming light to set the timming. which can only be done with the engine running at 750rpm

to put the CAS look in the FSM. you can get it close enough to get the car started. then adjust it once idling.

Digi7ech

iTrader: (1)

Hmm kinda on topic.

I took off my pulleys because the rebuild is in short block form still.

How do you tell the timing then/set it?
Doesn't the pulley have the timing mark on it?

Parastie

You guess, it's what i did...

igottafc

iTrader: (6)

i heard that you could just go to a local auto shop and they can set it for you for like 20bux. this true?

Rex4Life

You need to learn how to search better--there's tons of stuff about this.

Anyway, here ya go.

Set the main engine pulley yellow mark to line up with the front cover index. Then look at the bottom of the CAS. There is a indented dot and a ridge by the little gear at the end of the CAS. Line these up on the CAS and note the position of the gears under the CAS coverplate. Now just stab the CAS in and install it maintaining the postion you noted for the gears. I just did it a few months ago and mine was dead on. Of course then you need to verify and set it with a timing light, but that will get you real close.

Don't take it to a shop cause they don't know jack about rotarys. You can easily do this your self.

Good luck and welcome to the forum.

Scott

DelSlow

iTrader: (2)

I just got done doing this, and there really hasnt been a good, detailed write up for this. To stab the crank angle, set the little indentation on the CAS gear with the nubbin on the CAS body. this part is clearly shown in the manual. next, line the yellow mark(the one on the right) on the main pulley with the pin just above and a little to the right of the main pulley. you dont have to worry about the position of the pulley on the eshaft because it only bolts on in one position. then hook up your timing light and start the car up. if the timing is way off, the car might not idle and just die, so you might have to turn the idle up a little bit. i couldnt get mine to idle under 1000 rpm because my timing was off so much. i set the idle to 1200 and turned it down until i could see the marks on the pulley. then adjust the timing while turning the idle down until it idles good at 750. my timing was way off, and im going to have to restab the crank angle to set the timing better. Im not sure how to determine the exact timing though, as im still in the process of doing it. it says set the front trailing to 5 degrees ATDC, but im not sure what that means, anyone know? is it to the left or right? how do you know how many degrees it is?

igottafc

iTrader: (6)

what do you mean by this?

Rex4Life

The gear at the end and the sensor under the cover are connected to the same shaft. Once you note the position of the sensor with the gear/body marks aligned--you can then see if it's lined up while you're installing it. Basically you make a new alignment mark under the CAS cover, i.e. if the bottom gear is aligned the top sensor position will also be aligned. Sometime when you insert the CAS assembly into the engine, it moves a little. With these new reference marks you can tell if it moves and by how much.

rx-7fc

on my friends car we put the cas in the way the fsm says and it is right on when you look at the gear position under the cover plate but when you check it with a timming light it is way off

Project84

The main pulley should have two (2) marks on it like this.
Line the yellow mark up with the needle sticking out from the front cover.

The CAS has a rolled pin holding the gear shaft to the CAS body. There is also a dimple in the aluminum. Line this dimple up with the pointer. Install the CAS without moving the gear. The gear mates with a bevel gear in the engine. The shape of the teeth cause the CAS gear to move. I found it easier to take the black cover off the CAS, line the dimple up as discribed above, then make a mark on the inside of the CAS with a permanent marker or a dab of paint or something. This will show you where to set the CAS if it moves when you install it.

Project84

Here is another pic of the front cover and pulley. The yellow mark should be lined up with the pointer. The mark to the right should be yellow and the one to the left should be red. If you have 2 marks that are the same color, the one the right is the one you line up with the pointer.