Egr Valve
Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
If you're reasonably mechanical, it's not a bad job. Biggest problem I had was keeping the the runner gaskets lined up while trying to put the plenum back on. I left the lower runner bolts attached.
You'll also need an offset, 3/8" (?) wrench or a crows foot to get at one of the EGR bolts.
You'll also need an offset, 3/8" (?) wrench or a crows foot to get at one of the EGR bolts.
Melting Slicks
Joined: Jan 2001
Posts: 2,940
Likes: 5
From: Chesapeake VA
Here is a link to my intake swap photo doc. It shows what is involved in an intake teardown.
http://members.***.net/effergy/vette...e_install.html
http://members.***.net/effergy/vette...e_install.html
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
The plenum has to be removed, but the runners don't. Your first time it should take you less than an afternoon to do if you have the plenum and EGR gaskets on hand. Other than the crows foot wrench, you don't need any special tools. Just BE SURE to mark where the plenum bolts came from as they all look the same, but vary in length. Get a replacement EGR from the dealer. All of the auto parts places have EGR valves "similar" to the stock unit, but not an exact match. Some require shims to fit. For this job, buying the GM part will save you time and headache. The GM EGR should come with a new exact fit gasket in the box.
You may end up breaking some of the hard plastic hoses connected to the EGR. Any of the auto parts places will have replacements in flexible hose.
You may end up breaking some of the hard plastic hoses connected to the EGR. Any of the auto parts places will have replacements in flexible hose.
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Make sure that the new EGR valve you buy has the vaccum nipple on the side like the original one and the one pictured in the link above. Not on top like a lot of the parts stores ones have. If it's got it on the top, your plenum will hit it and not go down enough for you to be able to align the runner to plenum bolt holes.
Drifting
Joined: Jan 2002
Posts: 1,261
Likes: 4
From: Middle River MD
I just did this on my 89 last night. As stated above, only the plenum needs to be removed. The only things that need to be disconnected are the brake vacuum line and the throttle cable bracket. The worst part by far was the bolt on the driver side of the egr. I had to bend a 1/2" wrench to get at it. Most people say the bolts are 3/8, but mine were 1/2 for reasons I don't know. You may want to replace the vacuum lines down in there as well. I didn't and now wish I did because the one that plugs into the egr doesn't snug up real good and it is not sealing right.
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Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
Just thought I'd add this, too... for anyone else doing an EGR. I was in Sears earlier and didn't realize they sold individual crows foot wrenches. $4 for a 3/8" crows foot! Definitely makes the job easier.