Timing

Tiny
JOHNSKINNER1232
  • MEMBER
  • 2003 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
*Set number one to top dead center and put a new camshaft sprocket on lined up both back to flat did two rotations and intake is still flat but exhaust is a quarter turn off. But chain is still on my marks did this five times and have same results.
*New head and valves compression test is 220 dry and 225 wet.
I have new crankshaft sensor, camshaft sensor. And camshaft actuator solenoid sensor
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have the same problem?
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No
Thursday, August 4th, 2011 AT 2:38 PM

13 Replies

Tiny
JDL
  • EXPERT
Hi, if you do not have the proper tools for this, I am not sure what to tell you.

Tools required:

J 44221 Camshaft Holding Tool.

J 36660-A Torque/Angle Meter.

Install J 44221 with the camshaft flats up and the number one cylinder at top dead center.

Compress the tensioner and lock in place.
Install the crankshaft sprocket.
Install the intake camshaft sprocket into the timing chain.
Align the (dark) link of the timing chain with the timing mark on the intake camshaft sprocket (1).
Feed the timing chain down through the opening in the head.
Install the timing chain onto the crankshaft sprocket. Align the (dark) link of the timing chain with the timing mark on the crankshaft sprocket (2).
Important
It may be necessary to remove J 44221 to rotate and hold the camshaft (hex) to align the pin to the camshaft sprocket.

Install the intake camshaft sprocket onto the intake camshaft.

Caution!
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the intake camshaft sprocket washer and new bolt.

Tighten

Tighten the new intake camshaft sprocket bolt the first pass to 20 N m (15 lb ft).

Use J 36660-A to tighten the intake camshaft sprocket bolt the final pass an additional 100 degrees.

Install the exhaust camshaft actuator into the timing chain.
Align the (dark) link of the timing chain with the timing mark on the exhaust camshaft actuator (1).
Important
It may be necessary to remove J 44221 to rotate and hold the camshaft (hex) to align the pin to the camshaft sprocket.

Install the exhaust camshaft actuator onto the exhaust camshaft.
Caution!
The camshaft actuator must be fully advanced during installation. Engine damage may occur if the camshaft actuator is not fully advanced.

Install the new exhaust camshaft actuator bolt.

Tighten

Tighten the new exhaust camshaft actuator bolt the first pass to 25 N m (18 lb ft).

Use J 36660-A to tighten the exhaust camshaft actuator bolt the final pass an additional 135 degrees.

Unlock the tensioner.
Remove J 44221.

Important
Rotate the camshaft actuator clockwise relative to the camshaft prior to tightening the bolt.

Rotate the camshaft actuator clockwise (as seen from the front of the vehicle).

The dark links (1) on the chain should be aligned with marks on sprockets as shown.

Install the top chain guide.
Add threadlock GM P/N United States 12345498, GM P/N Canada 10953488 to the top chain guide bolt threads.
Install the top chain guide bolts.

Tighten
Tighten the top chain guide bolts to 10 N m ( 89 lb in).
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+1
Thursday, August 4th, 2011 AT 2:58 PM
Tiny
JOHNSKINNER1232
  • MEMBER
I have all right tools for job but still having exhaust side quarter out from being flat. If I spin camshaft actuator clockwise it puts it to flat. And sprocket does not move from marks on chain.
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Thursday, August 4th, 2011 AT 3:21 PM
Tiny
JOHNSKINNER1232
  • MEMBER
I have both tools for job. The code that came up is p1345.I tested all new parts I put in and they all have the right volts. Cam sensors and crank sensor. Just not sure why it is in retard mode after two rotations. Fourteen rotations and all my marks are lined up and exhaust sprocket is still quarter retarded. When putting it on I advanced it to set timing and put my tool on back of camshafts and also I put a flat edge on both just to make sure. Put oil in number one plug and clear line adapter to it to watch when I get to TDC. And done this now seven times. Lol
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Thursday, August 4th, 2011 AT 4:36 PM
Tiny
JDL
  • EXPERT
I would have to look at it. Some pictures below.
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+7
Thursday, August 4th, 2011 AT 4:47 PM
Tiny
JDL
  • EXPERT
At the moment, I am just like you, I am not sure what is going on?
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Thursday, August 4th, 2011 AT 4:57 PM
Tiny
JOHNSKINNER1232
  • MEMBER
Thanks, I am going to go over it on more time. Thank you for your help though.
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Thursday, August 4th, 2011 AT 5:14 PM
Tiny
JDL
  • EXPERT
I asked one of the moderators to take a look at your question, maybe he has some other ideas?
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Thursday, August 4th, 2011 AT 5:26 PM
Tiny
WRENCHTECH
  • EXPERT
Are you installing the camshaft actuator is a fully advanced position?
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Thursday, August 4th, 2011 AT 5:37 PM
Tiny
JOHNSKINNER1232
  • MEMBER
Yes I am, just stumping me. I have done everything text book only thing I can think of is new camshaft actuator sprocket is bad.
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Thursday, August 4th, 2011 AT 6:40 PM
Tiny
WRENCHTECH
  • EXPERT
No, I would bet there is a mistake in the installation somewhere. Those things are very sensitive.
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Thursday, August 4th, 2011 AT 6:42 PM
Tiny
BSTACK14
  • MEMBER
Did you ever figure out if the actuator was bad, or was this action normal? I have the same issue and not sure if I need to get a new actuator (or an installation error).
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Sunday, November 20th, 2011 AT 7:56 PM
Tiny
JDL
  • EXPERT
More people will see your post, if you make a new post? I do not know if he got it fixed? This is an older post.
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Sunday, November 20th, 2011 AT 8:04 PM
Tiny
MARVIN FADNBACCTOOBLUE COTTEN
  • MEMBER
If you go back a quarter turn then line the cams up it should be good.
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Friday, November 3rd, 2017 AT 7:06 PM

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