How hard to change the intake manifold? - 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

02-09 Vortec 4.2L I-6 Engine and Drivetrain Q&A forum for engine and drivetrain repairs/modifications/tuning.

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  #1  
Old 12-07-2005, 11:18 PM
junk junk is offline
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How hard to change the intake manifold?

Well I think I figured out my surging idle and SES problem. My intake manifold has a crack in it by the firewall. I could feel the vacuum with my hand. I also sprayed some starting fluid down there and the RPM's changed. After these two checks I'm pretty sure that is my problem.

So how hard is it to remove the intake manifold? Looks like I'll have to pull apart the drivers side of the engine & engine bay to get at the manifold. After that how hard is it to pull the intake? Does it have reusable gaskets or does it have rubber gaskets?

I'm going to look at doing the cheap route & just epoxy up the crack and bolt it back on. I've done that with other broken plastic parts with good results. I bought this wrecked & evidentaly missed this.

Thanks
Jeremy
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  #2  
Old 12-07-2005, 11:33 PM
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labor calls for 3.4 hours and the part lists for 319.34 us. part number is 89017551. try the glue just becareful it does not suck-in any into the engine
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  #3  
Old 12-08-2005, 09:38 AM
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tblazed tblazed is offline
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JB Weld!

There are complete engine assemblies for sale on eBay for $400 or so... maybe pick up a good used manifold at a salvage yard for cheap.
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  #4  
Old 12-08-2005, 11:43 PM
ScarabEpic22 ScarabEpic22 is offline
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I have a Chilton SUV service manual for TBs up to 03, but the manifold cant have changed much between years. I can scan the page(s) for you in a pdf and email them to you if you want. It isnt the TB specific manual, but the whole manual that covers everything from Lexus to GM to Dodge.
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  #5  
Old 12-09-2005, 09:14 PM
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if you do end up doing this yourself, can you take a picture of the manifold and port openings. Im trying to do some custom headers and im looking for as many pics as I can before I start the process, please post some up
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  #6  
Old 12-09-2005, 10:16 PM
ScarabEpic22 ScarabEpic22 is offline
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Quote:
Originally Posted by Trailblazin'
if you do end up doing this yourself, can you take a picture of the manifold and port openings. Im trying to do some custom headers and im looking for as many pics as I can before I start the process, please post some up
Sure, I will scan my book in and post a link to them for a few weeks.

Wait, just did that, the links will be up in a few min.

Links here: (Sorry for the not-so-great quality, but they are decent enough to get the idea)
http://i32.photobucket.com/albums/d4...Epic22/pg1.jpg
http://i32.photobucket.com/albums/d4...Epic22/pg2.jpg
http://i32.photobucket.com/albums/d4...Epic22/pg3.jpg
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  #7  
Old 12-10-2005, 10:17 AM
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Quote:
Originally Posted by ScarabEpic22
Sure, I will scan my book in and post a link to them for a few weeks.

Wait, just did that, the links will be up in a few min.

Links here: (Sorry for the not-so-great quality, but they are decent enough to get the idea)
http://i32.photobucket.com/albums/d4...Epic22/pg1.jpg
http://i32.photobucket.com/albums/d4...Epic22/pg2.jpg
http://i32.photobucket.com/albums/d4...Epic22/pg3.jpg
Great!! the 3rd page is perfect, already have an idea of what they should look like! nice one scarab
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  #8  
Old 12-10-2005, 10:01 PM
ScarabEpic22 ScarabEpic22 is offline
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Quote:
Originally Posted by Trailblazin'
Great!! the 3rd page is perfect, already have an idea of what they should look like! nice one scarab
Glad it helps ya!
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  #9  
Old 12-11-2005, 10:13 AM
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I6 INTAKE manifold??

I took a look at the pics. Looks to me like the intake manifold for a V8 in the first two, and the exhaust manifold for the I6 in the 3rd.
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  #10  
Old 12-11-2005, 10:43 AM
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jimmyjam jimmyjam is offline
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Quote:
Originally Posted by tblazed
I took a look at the pics. Looks to me like the intake manifold for a V8 in the first two, and the exhaust manifold for the I6 in the 3rd.
Page 2 says 4.3L engine. ala S10 blazer
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