Does it sound like my cam phaser should be replaced? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 08-10-2018, 02:00 AM
EliRuben EliRuben is offline
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Does it sound like my cam phaser should be replaced?

The timing chain went out on our 2004 TB. After removing half the vehicle to get to it, I'm at the point of installing the new parts. When I went to advance the Exhaust Cam Phaser, I first tried moving it by hand, wouldnt budge either way. I then tried with a big ass lock and groove pliers, still no movement. How much force is it supposed to take to rotate the phaser? Does it sound like ours is shot?
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  #2  
Old 08-17-2018, 12:10 AM
MHWhite5 MHWhite5 is offline
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2003 Chevy TrailBlazer LT EXT
Black 4.2L I6 4X4
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Any luck on this? Mine is actually the opposite I can move mine by hand with an Allen wrench
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Old 08-24-2018, 12:44 AM
EliRuben EliRuben is offline
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After thinking about how much I don't want to have to take it back apart, we decided to pick up a new Delco Actuator. The new one was pretty stiff but did move a little, so idk if it was necessary or not. Better safe than sorry.
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  #4  
Old 08-24-2018, 10:43 AM
mddombrowski mddombrowski is offline
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2006 Chevy TrailBlazer LT EXT
Summit White 4.2L I6 4X4
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Location: Charlotte, NC
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It's not pressed on so it should come right apart.

I've not had to deal with chain noise yet. The beast for me appears to be removing that front engine cover (which requires removal of the oil pan, which requires displacement of the front diff case...)

What procedure did you use to tighten the crankshaft balancer to make sure it was torqued to spec? Any idea what caused the chain to fail? They don't tend to break in general.
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  #5  
Old 09-27-2018, 07:35 PM
EliRuben EliRuben is offline
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The original issue was losing tension in the timing chain and getting a rattle. Your'e right about the timing cover being a pain to take off.
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