usually when you change the sprockets on camshaft, you need to release the timming chain tensioner, to get slack in the chain, the only way to get to the tensioner, is to take the front cover off, the only way get the front cover off, is to remove the oil pan, to get the pickup tube that's bolted to the oil pump. if the tensioner get slack in it, it will tighten the chain, then there's no way to get the sprocket back inchain. The tensioner is on a rachet. I have been a mechanic for 50 some years, I know my engines, just don't know my pcm's

 

The L5 is the worse designed engine I have ever seen. To put new timming chains in a L5, you got to pull the oil pan, and transmission.

 

Only the balance chain requires transmission removal! Btw, my '07 timing chains are still OE, and still running like new! Doc Olds posted the manual, look at the installation process.

 

if you bought your 07 new, or close to new, means you took good care of your 07 engine, which the L5 is built tough. If I can keep the timming chain tight while I take the actuator sprocket out, the new sprocket will go back in fine, but if the timming chain gets any slack, the chain tensioner will take up the slack, then the chain is to tight on the sprocket, and will ware the timming chain out faster. I didn't see where Doc put the manual, but I have one on the 07.

 

Thank you Doc Olds, you were right. I found what I need to change exhaust actuator, I need tool J44217. Have a great day.

 

Thank you hummerz. You were right, I don't need to pull the front cover, or oil pan.. I need tool j44217, hope you had a great day..

 

Look Here::::>>> J-44217-45 & Here::::>>>J-44221

Camshaft Position Exhaust Actuator Replacement

Tools Required

• J-44217-45 Chain Holding Tool. See Special Tools.
• J 44221 Camshaft Holding Tool. See Special Tools.
• J 45059 Angle Meter. See Special Tools.

Removal Procedure

Fig. 142: View Of J 44221 Camshaft Holding Tool Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.


CAUTION: Refer to Camshaft Holding Tool Caution .Fig. 143: View Of J 44217 & EN-44217-45 At Timing Chains
Courtesy of GENERAL MOTORS CORP.

Fig. 144: Identifying Exhaust Camshaft Position Actuator
Courtesy of GENERAL MOTORS CORP.

1. Remove the camshaft cover. Refer to Camshaft Cover Replacement.
2. Ensure the exhaust camshaft position (CMP) actuator is functioning properly. Refer to Camshaft Position Actuator Diagnosis.
3. Remove the exhaust CMP sensor. Refer to Camshaft Position Sensor Replacement - Exhaust .
4. Remove the intake CMP sensor. Refer to Camshaft Position Sensor Replacement - Intake .
5. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the compression stroke.
6. Using the timing mark on the exhaust camshaft position actuator sprocket as a reference, make a mark on the timing chain link adjacent to it.
7. Install the J 44221 to the rear of the camshafts. See Special Tools.
8. Complete the following in order to install the J-44217-45 (1). See Special Tools.
   1. Install the hook portion of the timing chain retention tools into one of the timing chain links near the timing chain shoe on both sides of the engine.
   2. Tighten the wingnuts.
   3. Ensure the hooks are still in one of the links and the gage blocks of the tool are firmly in place on the edge of the head.
9. Remove and discard the exhaust camshaft position actuator bolt.
10. Remove the exhaust camshaft position actuator.
11. Clean and inspect the sprocket. Refer to Timing Chain and Sprockets Cleaning and Inspection.

Installation Procedure

Fig. 145: View Of Exhaust Camshaft Actuator
Courtesy of GENERAL MOTORS CORP.


IMPORTANT:

• To aid in aligning the actuator to the camshaft, use a 25 mm (1 in) wrench on the hex of the camshaft to rotate
• Ensure the alignment pin is properly engaged with the camshaft

Fig. 146: Identifying Exhaust Camshaft Position Actuator
Courtesy of GENERAL MOTORS CORP.


NOTE: Refer to Fastener Notice .Fig. 147: View Of J 44217 & EN-44217-45 At Timing Chains
Courtesy of GENERAL MOTORS CORP.

Fig. 148: View Of J 44221 Installed On Camshafts
Courtesy of GENERAL MOTORS CORP.

1. Ensure the camshaft actuator is fully advanced prior to installation.
2. Install the exhaust camshaft actuator into the timing chain.Aligning the marked link (1) on the timing chain with the timing mark (1) on the exhaust camshaft position actuator sprocket.
   
3. Install the exhaust camshaft actuator onto the exhaust camshaft.
4. Install a NEW exhaust camshaft actuator bolt.Tighten: Tighten the bolt a first pass to 25 N.m (18 lb ft). Using the J 45059 rotate the bolt a final pass an additional 135 degrees. See Special Tools.
   
5. Remove the J-44217-45 (1). See Special Tools.
6. Remove the J 44221 from the camshafts. See Special Tools.
7. Install the CMP sensor. Refer to Camshaft Position Sensor Replacement - Intake .
8. Install the exhaust CMP sensor. Refer to Camshaft Position Sensor Replacement - Exhaust .
9. Install the camshaft cover. Refer to Camshaft Cover Replacement.

 

Thank for all your help, and patience. This is great help. I plan on doing this project as soon my tools come in. I have the j44217, waiting on the j44217 - 45. I'm also in the irv2 forum, I was in chat about inline filter for a c-7 huey pump, and a guy got in on the chat, and started telling us we were idiots, so I'm sort of toughy sometimes on these forums. Some guys are not friendly sort of speech. So thanks for your patiences. You, and Doc Olds are great friends to have..

 

The final pass on the bolt can be done without a $700+ angle meter. From vertical make a mark @ 135° and start your torque wrench at 0° or you could get a cheap angle gauge at autozone---> OEMTOOLS Torque Angle Gauge