question on cas internals - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

msanchez · 07-11-2010, 07:56 PM

I bought a used crank angle sensor for my redtop build.

we opened it up to find that the thin metal disk on the top is slightly warped.

(not completely flat)

a friend said this could cause detrimental damage to the motor. Is this true? would the motor just not run properly?

is this common? will it cause a problem? and is the part replaceable or do i need to

buy a whole new cas?

thanks in advanced.

Sileighty_85 · 07-11-2010, 08:08 PM

Its not common and might be a problem

The disk is not replaceable.

Spin the CAS and listen and feel for contact.

It MIGHT be alright if you dont detect contact

msanchez · 07-11-2010, 08:12 PM

its not making contact with the black point (the car part that reads the disk)

Is it ok if its not making contact? Or will it still cause problems?

thanks

Mike

Sileighty_85 · 07-11-2010, 08:27 PM

hmm cant really guarantee to you, due to liability reasons.

You could read the inspection criteria in the FSM and test it accordingly

Hashiriya415 · 07-11-2010, 08:50 PM

light shoots through the holes and gets picked up by the reader, I can't remember so good when I took it apart, but I see no reason for it to make any contact to anything.
This engine your friend blew because of this sounds very interesting topic, I think you should start talking about that and post some pics of how the CAS blew his engine.

msanchez · 07-11-2010, 10:14 PM

Quote:

Originally Posted by Hashiriya415

light shoots through the holes and gets picked up by the reader, I can't remember so good when I took it apart, but I see no reason for it to make any contact to anything.
This engine your friend blew because of this sounds very interesting topic, I think you should start talking about that and post some pics of how the CAS blew his engine.

what we are saying is if the disk is warped enough, it could make contact with the reader, which only has a few cm clearance on either side.

i have no pictures or solid info on the motor blowing. he spun a bearing and assumed the bent cas ring had something to so with it because after the rebuild it still ran like garbage until he replaced. theres no real info on the subject so i decided to ask.

someone help me out!

Hashiriya415 · 07-11-2010, 11:46 PM

so either straighten it or get another one, cuz this rubbing is like tire rubbing on fender.

msanchez · 07-12-2010, 08:18 AM

Quote:

Originally Posted by Hashiriya415

so either straighten it or get another one, cuz this rubbing is like tire rubbing on fender.

What? It nothing like a tire rubbing a fender..
Can who knows more about how a cas works tell me if this can/will hurt the motor.?

Hashiriya415 · 07-12-2010, 01:20 PM

Your friend blowing the motor over this is a joke. Just like my other friend that said him and a friend built an engine and a hair got stock between the cam lobe and caused the stock engine to open the valve just a bit to much to hit the piston.
If your CAS isn't reading then you won't be getting fuel and spark. You'll be getting misfires, because it can't detect RPM. When a tire is rubbing on fender something is wearing down, that is the same thing as your CAS, if it's rubbing something you will have wear and tear.

msanchez · 07-12-2010, 04:17 PM

^ but it's not rubbing. The disk isn't making contact with anything in the cas

msanchez · 07-14-2010, 10:37 AM

Still don't had a solid answer. Can someone help me out?

Ceepo · 07-14-2010, 10:44 AM

Its not gonna contact anything it doesnt touch anything, just try it and see if it works, worst thing is the cars gonna run like shit, gonna have to buy a new CAS and finished... done...

/end thread

msanchez · 07-14-2010, 06:58 PM

^thank you.

msanchez · 09-01-2010, 11:53 AM

just incase anyone searches on this.

The bent disk did not allow the cas to work properly. It was causing the coil packs to fire wayyyy late, and not allowing the car to start.

07-11-2010, 07:56 PM	#1
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	question on cas internals I bought a used crank angle sensor for my redtop build. we opened it up to find that the thin metal disk on the top is slightly warped. (not completely flat) a friend said this could cause detrimental damage to the motor. Is this true? would the motor just not run properly? is this common? will it cause a problem? and is the part replaceable or do i need to buy a whole new cas? thanks in advanced. Last edited by msanchez; 07-14-2010 at 10:36 AM..

07-11-2010, 08:08 PM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Its not common and might be a problem The disk is not replaceable. Spin the CAS and listen and feel for contact. It MIGHT be alright if you dont detect contact __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-11-2010, 08:27 PM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	hmm cant really guarantee to you, due to liability reasons. You could read the inspection criteria in the FSM and test it accordingly __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-14-2010, 10:44 AM	#12
Ceepo Nissanaholic! Join Date: Jan 2008 Location: Cedar City, Utah Posts: 2,007 Trader Rating: (9) Rides Gallery: Ceepo Feedback Score: 9 reviews	Its not gonna contact anything it doesnt touch anything, just try it and see if it works, worst thing is the cars gonna run like shit, gonna have to buy a new CAS and finished... done... /end thread __________________ TW: http://zilvia.net/f/cars-sale/390459...d9s-coils.html

07-11-2010, 08:12 PM	#3
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	its not making contact with the black point (the car part that reads the disk) Is it ok if its not making contact? Or will it still cause problems? thanks Mike

07-11-2010, 08:50 PM	#5
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 37 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	light shoots through the holes and gets picked up by the reader, I can't remember so good when I took it apart, but I see no reason for it to make any contact to anything. This engine your friend blew because of this sounds very interesting topic, I think you should start talking about that and post some pics of how the CAS blew his engine.

07-11-2010, 11:46 PM	#7
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 37 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	so either straighten it or get another one, cuz this rubbing is like tire rubbing on fender.

07-12-2010, 01:20 PM	#9
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 37 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	Your friend blowing the motor over this is a joke. Just like my other friend that said him and a friend built an engine and a hair got stock between the cam lobe and caused the stock engine to open the valve just a bit to much to hit the piston. If your CAS isn't reading then you won't be getting fuel and spark. You'll be getting misfires, because it can't detect RPM. When a tire is rubbing on fender something is wearing down, that is the same thing as your CAS, if it's rubbing something you will have wear and tear.

07-12-2010, 04:17 PM	#10
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	^ but it's not rubbing. The disk isn't making contact with anything in the cas

07-14-2010, 10:37 AM	#11
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	Still don't had a solid answer. Can someone help me out?

07-14-2010, 06:58 PM	#13
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	^thank you.

09-01-2010, 11:53 AM	#14
msanchez Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, California Posts: 324 Trader Rating: (3) Feedback Score: 3 reviews	just incase anyone searches on this. The bent disk did not allow the cas to work properly. It was causing the coil packs to fire wayyyy late, and not allowing the car to start.