An easy way to find TDC?

[darkred87T]

First off, I don't have any of those fancy tools like piston stops, dial indicators or degree wheels.
I'm in the process of replacing my timing chain cover gasket and I'm at the point where the cam sensor goes back in. I marked the base of the sensor against the cover before I took it off but forgot to mark where the gear was positioned. Iv'e have found TDC before with other cars Iv'e owned in the past but it always involved pulling the valve cover off and rotating the engine a full cycle to get the rockers lined up at TDC on the compression stroke.

Well, I figured I would do the same this time and then make sure the mark on the damper is lined up at 0 degrees on the timing indicator. Would this method be accurate enough for positioning the cam sensor? What do you all think?

 

[9daysbefore]

I sent you an email with some directions for finding TDC.

Hope that helps.

9daysbefore

 

[fxdxlr8]

Would you mind sharing that with the rest of the board ?

 

[9daysbefore]

I N S T A L L A T I O N I N S T R U C T I O N S
107112 CAM SENSOR CAP with built-in Setting LED
Copyright ©2005 Casper’s Electronics, Inc. All rights reserved. Unauthorized duplcation of this document in all or in part is strictly prohibited unless authorized by Casper’s Electronics, Inc. in writing.

It is a PDF file that is long and copyrighted as you can see. It gives the information as in relationship to installing Casper's cam sensor cap. It is good information.

I know that Kirbans and Gbody parts sell the tool if you are interested.

I am not going to post Casper's copyrighted material.

I found the PDF file on the internet awhile back and downloaded it from there.

 

[SouthernCal GN]

Here you go!

Cam Sensor Information

BTW, pulling the DS valve cover is only 4 bolts and almost 0 drama, so take it off to find TDC, then follow the provided directions.

HTH

 

[cabech984]

I found TDC by looking through w/ a flashlight and watching the springs. However, when I tried to time the cam sensor, it only stayed @ 7.04 volts. Should it gradually go to zero? Or only when it sees the sensor windows??

Sry for the thread hijack, this may help you too!!!

Happy 4th of July!!
Chris

 

[turbodave231]

Finding TDC and 25 degrees past TDC on #1 is easy:

• Remove #1 spark plug and have a friend rotate the engine Clockwise by hand
• Hold a finger over the #1 spark plug hole
• You will feel the rise in compression
• Line up the balancer mark to the pointer at zero
• Use masking tape or scribe a line on the balancer at 12 degrees
• rotate the new mark to zero on the pointer
• make another new mark at 12 degrees past tdc
• rotate the second new mark to zero on the pointer
• rotate balancer one more degree
• Make a permananet mark on the balancer at 25 degrees past TDC.
• (This will make future cam sensor checks easy)
• Adjust sensor per instruction above.

 

[darkred87T]

Kind of a dumb question but....

I assume that youre' supposed to bring the timing mark on the damper to 25 degrees ATDC BEFORE installing the unit into the cam gear right? You don't set it in at 0 degrees, move the crank to 25 degrees ATDC, then set the sensor, correct? I Hope that made sense.

 

[bodycount]

25 ATDC drop in the sensor, put on cap. Probe blue wire for 7v while turning sensor, soon as voltage drops tighten down sensor and your done.

 

[darkred87T]

O.K. thanks

 

[fxdxlr8]

I thank-you also. Great Stuff.