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Cam Sensor

XTC333

By XTC333,
in Engines & Forced Induction

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XTC333 Apprentice

XTC333

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Hi all,

Been reading alot about this forum, only got a chance to register now.

Sorry to ask questions in my first post but I'm running out of ideas. Here's my problem. I took the cam sensor (the thing on the cam gears cover) out to check my timing belt then put it back ( I think I turned a few turns of the thing-stupid me) the car wouldnt want to start, no matter how I adjusted it it just won't start. Can anyone shed some light? Thanks heaps...

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WetGTR Proficient

WetGTR

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Did you move the timing belt at all?

If you didn't the cam sensor has a half moon thing inside the gear that goes into the cam. Make sure its in position and on properly. Adjust to the former position and make sure the cam wiring is in place.

If it dosen't start, try using a timing light to see if your out.

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XTC333 Apprentice

XTC333

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Did you move the timing belt at all?

If you didn't the cam sensor has a half moon thing inside the gear that goes into the cam. Make sure its in position and on properly. Adjust to the former position and make sure the cam wiring is in place.

If it dosen't start, try using a timing light to see if your out.

I didn't move the timing belt at all. I've just found out that the half moon key on the cam was broken thats why I can slide the sensor in more than one way. How the hell am i gonna get it right? I've tried many angle but it wont start still. I'm thinking of getting another exhaust cam. Any idea how much the stock exhaust cam is going for?

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WetGTR Proficient

WetGTR

Posted
Posted

There is a way to do this but will take some time. I can think of 2 ways atm:

1. unbolt the CAS so it can freely move clockwise & anti-clockwise. Get some to crank the car and keep moving it clockwise until it wants to start and if not anti clockwise. If it hasen't started note how much you were able to move the CAS and re-position the CAS in the cam and try again. If you find the point where she starts, move the CAS from the cam until you are able to bolt it up and have some movment.

2. Use a timing light while cranking and see if the marks show up. If not, not the CAS from the crank until the marks up, means your geting very close. This method can also aid the above method.

Just a note, when engine is at TDC (top dead centre) while removing the CAS from the cam, there is a geogon pin that goes through the shaft of the CAS. This pin should be facing directly up or down - one of them will be right. This is good as a starting reference.

Its a bit of messing around but a little time & you'll get it.

There might be a better method, this is just what I have done before.

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blind_elk Grand Master

blind_elk

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I didn't move the timing belt at all. I've just found out that the half moon key on the cam was broken thats why I can slide the sensor in more than one way. How the hell am i gonna get it right? I've tried many angle but it wont start still. I'm thinking of getting another exhaust cam. Any idea how much the stock exhaust cam is going for?

Firstly, visualise where the CAS needs to be to align if the half-moon key was still attached to the cam.

Alternately, the CAS also aligns via a set of teeth on the CAS shaft and the cam, and the engine will only start with the CAS in one position. Simply move the CAS shaft by one tooth and try to start the engine. Once the engine starts, use a timing light to set the timing correctly.

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