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2005 Chevrolet Colorado engine rebuild

Tiny
SHANE2014
  • MEMBER
  • 2005 CHEVROLET COLORADO
  • 3.5L
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
I'm rebuilding a chevy Colorado 3.5L inline 5 cylinder engine. My question is when you put the exhaust camshaft actuator on the exhaust cam do you turn the actuator cap clockwise before you torque it? If so how far do you turn it?
Monday, November 3rd, 2014 AT 5:42 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi:

1) Make sure the camshaft is fully advanced prior to install

2) Install the camshaft actuator into the timing chain
(align the marked link (1) in the timing chain with the timing mark (1) on the exhaust camshaft position actuator sprocket. See pic attached.

NOTE: the camshaft actuator must be fully advanced when installed or engine damage can occur.

NOTE: To help in aligning the actuator to the camshaft, use a 25mm wrench on the hex of tha camshaft to rotate it. Also, make sure the alignment pin is properly engaged with the camshaft.

3) Install a new camshaft actuator bolt and torque to 18 ft/lbs Using tool J45059 to rotate the actuator bolt an additional 135 degrees.

NOTE: This procedure does require the use of GM tools J44221 and J44217 to lock the cams in position.
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Monday, November 3rd, 2014 AT 6:23 PM
Tiny
SHANE2014
  • MEMBER
  • 2 POSTS
The actuator turns, but how far do you turn it before you install it?
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Monday, November 3rd, 2014 AT 6:31 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Turn it until it is fully advanced.
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Monday, November 3rd, 2014 AT 6:58 PM
Tiny
HOWARD COWELL
  • MEMBER
  • 1 POST
How do you fully advance the timing actuator? How do you know if its fully advanced?
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Tuesday, October 11th, 2016 AT 3:04 PM

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