How do I remove my valve cover? - 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 04-02-2006, 04:13 PM
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How do I remove my valve cover?

I'm trying to replace the valve cover gasket on my 4.2L I6. How do I remove that black thing on the right side of the engine? I'm guessing it's some kind of heat shield for the intake manifold? That big black thing. I don't see clips OR bolts, and I've been fooling with it for almost 2 hours now. PLEASE HELP!! I cannot remove the valve cover because ONE bolt is under that black cover (where the throttle body is).
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  #2  
Old 04-02-2006, 04:16 PM
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Here is a pic. It's that big black case that runs along the right side of the engine (where the throttle body is hooked into)

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  #3  
Old 04-02-2006, 07:18 PM
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If I'm not mistaking the arrow the big black thing is the intake manifold. It would bolt to the side of the head and you would need a new gasket. Jay
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Old 04-02-2006, 07:44 PM
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Yep, the 'big black thing' is the plastic intake manifold. It looks like that has to come off. The coil overs and spark plugs will have to come out, plus any wiring or tubing that's in the way. Take some pics if you can!

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Old 04-03-2006, 01:51 PM
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Yeah, it does have to come off. My problem was that I don't know HOW to take it off. I don't see how it is fastened at all... I gave up on it, and I'm back at school now. I won't be able to work on it again for another month.
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Old 06-22-2009, 11:29 PM
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Manifold removal

So, did anyone figure out how to remove the intake manifold? I too am working at removing the valve cover. One post I read said that removing the throttle body would give enough clearance, but it's not looking that way.

Help!
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Old 06-22-2009, 11:39 PM
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I haven't tried... or checked... yet I would think that you can pry-it-open in the middle?
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Old 06-22-2009, 11:42 PM
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A/C needs to be discharged and the A/C line running over the front of the valve cover needs to be removed
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Old 06-23-2009, 12:14 AM
toad43 toad43 is offline
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Quote:
Originally Posted by MajesticLT03 View Post
A/C needs to be discharged and the A/C line running over the front of the valve cover needs to be removed
I'm not yet worried about the A/C lines running across the top front of the valve cover, it's the intake manifold I'm working on right now, since I can not access the valve cover bolts until it is moved.

I'm guessing the bolts are on the underneath side of the manifold and are very hard to get to. Just hoping someone has done this before and wishing there were step by step photo instructions.
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  #10  
Old 06-23-2009, 12:16 AM
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Quote:
Originally Posted by PR View Post
I haven't tried... or checked... yet I would think that you can pry-it-open in the middle?
Pry-ing it open just doesn't seem like a good idea since it doesn't open easily. I definitely tried that first, but it seemed more likely to break then to open.
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