Crank Angle Sensor (Cas)? Help!?

[starscream_r32]

Hey all,

Please refer to pictures as i'm not 100% sure if i know what i'm talking about.

I believe it's the CAS that's in the fotos?

Anyhow... i;ve noticed that when engine is running the cas is shaking/wobbly.

Is anyone able to tell me if that's normal or if it looks ok how it is in the foto?

There seems to be only 1 bolt holding it on top as well?!

Got the car like that so now sure if it's okay or not.

How do i go abouts fixing it if it's not okay?

What will i need/parts? etcc... and help on how i do it would be great.

Unless it's fine as it is.

Thanks!

[Beer Baron]

it should not be wobbly. I can't see the bolts. I acn see one in the bottom of your second pic, can see part of the slot where the second one goes (top left of pic) but can't see any bolt (but it could be out of frame) and I think I can see the third bolt (top right). and yes that is the CAS - Cam Angle Sensor (aka crank angle sensor). it's find where it is but you need all 3 bolts in place as otherwise it might be sliding around which will be affecting your timing.

[mosquitocoils]

As above, it really needs to be held in tightly. Take the screw to a hardware store and see if you can match it... that is if Nissan can't help

[starscream_r32]

1st pic there is a bolt on the right.. but none of left..

so your saying it should be tight and not moving so i need to find another bolt to secure it?!

im told that it needs to be gapped or spaced properly?

or just get a bolt and tighten it all the way in?

thanks.

[jrm]

There should be a washer or something behind the CAS to ensure the spacing is correct, yes. Normally your timing belt cover would be performing that function - but for whatever reason you don't have one.

You should definitely have all the bolts in-place, or yes, there's going to be issues - ditto the spacing.

Have you considered putting the cover back on, and bolting it back up that way?

[mad082]

if you tighten the bolts all the way and you can still wobble it then you need to put spacers in it to make up for not having the cam gear cover.

[starscream_r32]

There should be a washer or something behind the CAS to ensure the spacing is correct, yes. Normally your timing belt cover would be performing that function - but for whatever reason you don't have one.

You should definitely have all the bolts in-place, or yes, there's going to be issues - ditto the spacing.

Have you considered putting the cover back on, and bolting it back up that way?

would make me life easier if i did have it! loll..

car came as is without the cover!

[BH_SLO32]

You appear to missing the spacers. These are included in the rubber seal which slots into place in the cam cover. If you tighten the bolts without the spacers the CAS will rub against the cam gear resulting in metal filings. I am guessing the previous owner had discovered this and hence left the CAS loose. Not good. I think the spacers are about 5mm thick. Someone maybe able to confirm.

[MrStabby]

Also,

1. dont run the engine until the CAS is properly attached

2. check the timing after you've sorted the attachment (there's probably a write up on how to do it in the DIY section)

[starscream_r32]

Also,

1. dont run the engine until the CAS is properly attached

2. check the timing after you've sorted the attachment (there's probably a write up on how to do it in the DIY section)

in relation to point 1.

the previous owner had always run the car with it like that.

and i've run the car like that for the many months i've had it for!

a vid will be uploaded in the next few mins for u all to see it moving.

[PM-R33]

You appear to missing the spacers. These are included in the rubber seal which slots into place in the cam cover. If you tighten the bolts without the spacers the CAS will rub against the cam gear resulting in metal filings. I am guessing the previous owner had discovered this and hence left the CAS loose. Not good. I think the spacers are about 5mm thick. Someone maybe able to confirm.

100% right.

Tightening the bolts with no timing belt cover off will kill the CAS, it's just a matter of time.

[starscream_r32]

please refer to clip attache for my cas and fan problems

updated inputs would be great!

thanks

[Moodles2]

If the CAS is too close to the exhaust cam's key, it will destroy the CAS' optical sensor and believe me I've destroyed a CAS (not used the spacers from the stock timing belt cover when I put a clear cover on)

[Tony de Wonderful]

There should be a washer or something behind the CAS to ensure the spacing is correct, yes. Normally your timing belt cover would be performing that function - but for whatever reason you don't have one.

You should definitely have all the bolts in-place, or yes, there's going to be issues - ditto the spacing.

Have you considered putting the cover back on, and bolting it back up that way?

It's actually brass washers embedded in a gasket that provides the spacing rather than the cam gear cover per se.

I've heard you can toast your CAS by not having the correct spacing so it pays to be careful.

I have an aftermarket clear cover which has no provision for the OEM washers and gasket, but it provides the (some) spacing instead the way it's designed. I added some thin steel washers myself because the spacing provided by the aftermarket cover was very slightly less than the OEM washers/gasket.

I've heard some aftermarket covers provide no spacing though.

Edited January 19, 2011 by Tony de Wonderful

[GTRNUR]

Yes what Tony has said is correct.

And yes you should remove the cover from your CAS and inspect it after you fit a cover and gasket/spacer. What you are looking for is the position of the trigger disc, and if it is rubbing on the optic sensor. If it is, you can carefully and gently tap the shaft back to its position in the CAS bearings where it should be positioned... so the trigger disc is central in its position in the middle of the optic.