Timing chain replacement issue

Tiny
LARRY DENMAN
  • MEMBER
  • 2007 CADILLAC STS
  • V6
  • AUTOMATIC
  • 130,000 MILES
I have a timing chain issue on the right side as sitting in the vehicle. I ordered the kit and replaced tensioners, chains and most of the sprockets. I lined up the TDC mark and aligned the cam and such as the video showed. Now I am turning it by hand and the marks no longer line up on the cams properly. I have turned it several times and at no point is it correct anymore. Start all over again and same thing.
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Wednesday, September 16th, 2020 AT 6:37 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

As long as it was correct when you installed it, you will be fine. The sprockets are different sizes so for them to align again can take a ton of turns.

If you provide me with the engine size, I can provide the directions so you can reconfirm you did it correctly.

Let me know.

Joe
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Wednesday, September 16th, 2020 AT 6:50 PM
Tiny
LARRY DENMAN
  • MEMBER
Cts 3.6.
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Wednesday, September 16th, 2020 AT 6:55 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Interestingly, the manual shows two different designs based on production date. I am going to provide the one for first design of 2007. If you provide the production date, I can confirm.

_________________________

Here are the directions. The attached pics all correlate with the directions. Note this is the right side (passenger side)

________________________

2007 Cadillac CTS V6-3.6L
First Design - 2007
Vehicle Engine, Cooling and Exhaust Engine Service and Repair Overhaul Unit Repair 07 CTS 3.6L Repair Instructions 125. Secondary Camshaft Drive Chain Installation - Right Side First Design - 2007
FIRST DESIGN - 2007
Secondary Camshaft Drive Chain Installation - Right Side
(First Design - 2007)

pic 1

1. Ensure that the crankshaft is in the stage 2 timing drive assembly position (1).

Pic 2

2. Install the right secondary camshaft drive chain.

Pic 3

3. Place the secondary camshaft drive chain around the right camshaft intermediate drive chain idler outer sprocket, aligning the timing camshaft drive chain link (1) with the alignment access hole (2) made in the right camshaft intermediate drive chain idler inner sprocket.

Pic 4

4. Wrap the secondary camshaft drive chain around both right actuator drive sprockets.
5. Ensure there are 7 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.

Pic 5

6. Align the right exhaust camshaft position actuator sprocket alignment triangle mark (1) with the timing camshaft drive chain link (2).

Pic 6

7. Align the right intake camshaft position actuator sprocket alignment triangle mark (2) with the timing camshaft drive chain link (1).

Pic 7

8. There will be 18 links (1) between the right camshaft intermediate drive chain idler timing camshaft drive chain link and each right camshaft position actuator sprocket timing camshaft drive chain link.

_______________________________________

While looking through the manual to find this, I came across something that may put your mind at ease. Read this.

Even when only one sprocket is involved, multiple crankshaft rotations will not produce conditions where correct timing can be confirmed.

_____________________________________

As long as you had it right from the start, you should be fine.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Wednesday, September 16th, 2020 AT 7:29 PM
Tiny
LARRY DENMAN
  • MEMBER
Okay, I did everything just as described in the instructions to a T double and triple checked it all. Just out of curiosity before I got it all together ie I had the front cover back on and sensors and such plugged in but decided to compression check it and no compression on any cylinders. My first thought is that my crank was 180 out but with the L and R alignments it would not be possible? Any thoughts?
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Thursday, September 17th, 2020 AT 12:47 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

This is an interference engine. Was the engine running when the chain failed?

Let me know.
Joe
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Thursday, September 17th, 2020 AT 6:53 PM

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