why is left so easy to find and no right sides ...6 bolt

 

The simple answer is that the left (driver's) side doesn't have the EGR valve mounted to it like the right (passenger's) side does . The valve fails , the bolts shear off while attempting replacement , and most backyard mechanics are not so proficient in drilling and tapping the new holes required to repair the manifold .

 

Oh and Aha! Thanks for caring OrangeBird!:Still... one would think they would produce both sides in aftermarket ...My exhaust manifold has a leak but it has not failed.Thank God....replaced egr valve gasket,...it had not failed but was hoping to improve performance...... so you think better not to mess with it, eh? Just live with the EM leak? Is the Catalytic Converter an issue re connections, leaks...how it connects to exhaust? Its a Cali car but I am brought it to MAUI.

 

The passenger side manifold may be part number 10044876. Regrettably, chasing this part number on a Google search can take you to several parts that are only "almost right."

I'm going to post some pics I harvested from eBay. But note that the manifolds in the pics are not threaded for the A.I.R. (air-injection) system.

My 1988 Sport Coupe has an EGR/manifold arrangement that looks like this:

Note the flat-plate connector between the accordian EGR pipe and the manifold.



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Note how the manifold has a flat surface and two bolts to accept the accordion pipe.



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This pic shows the part-number on each respective manifold.



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To add to the confusion and frustration, if you do a search for the part number, you will sometimes find used manifolds that are just like the ones I've shown. But, you will more-often find a similar manifold that mounts a different EGR tube that attaches like a pipe-fitting instead of the plate-and-two-bolt fitting that we are familiar with. You can even get NEW manifolds that have the "wrong" fitting.



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These "wrong-design" manifolds are currently available for purchase on eBay.

I wonder whether anybody has ever adapted the pipe-thread type EGR connection to our cars?

 

I wonder whether manifold number GW63Z2 will fit the right side of our cars?

It looks like it has the proper flange to mate with the EGR-tube flange, as well as the option to accept the pipe-thread type EGR tube. Block-off plates included, depending on which design you have.

A "universal" right-side manifold???

https://www.ebay.com/itm/Dorman-Exha...d=331478710811

 

Wow Awesome detailed research W.E.G.!!!!!!...I will work on this one and get back to the thread...love my car want to keep her healthy and happy!

 

I'd be very interested to see what you come up with.

I have a very tired 2.8 under the hood of my '88. I've been meaning to do something about it, but I need to work-out a couple things first. Not among those things, but still a concern is that exhaust manifold. I've already got a broken fastener on each manifold. I guess somebody tried to mess with it at some point. I'm pretty sure I've got a hairline crack in the manifold on the passenger side too.

Bottom line is, before I start ripping-apart a motor that currently runs and drives, I want to be sure I have ALL the parts I need to to put it all back together withouth delay or any sort of snipe-hunt. A new set of correct, or properly-adapted exhaust manifolds would be a big step in the right direction.

I actually already have a "spare motor" I got from a member here. Its sitting under a tarp on the back porch. If I can get all these lifestyle things sorted, I'd like to overhaul THAT motor, and have it all ready to just drop-in. The spare motor is a 3.1 from a 1992 car. So, I'll probably only try to use the long-block part of that motor. Unless I want to adapt the 1992 ECM to my '88, I think I'm still going to need to use all the intake parts from the 2.8.

I've already got Gen5 Camaro with the LS3 (scary fast). So, I really would like to keep the '88 alive in (at least mostly) its original V6 configuration, smogs and all.

Anyhow, not trying to hijack your thread with my procrastination and lifestyle issues. Let us know if there is anything we can do to help.

 

Ok...Well you guys are sweet dolls to answer and care...sure do miss Frick and Frack.....This is my second 2.8 firebird...my black one lasted 25 years and still going but rust got to it when I let a few small spots fester too long...What a beauty.. full ground effects like a trans am, t-tops ... I was in Love ..sold it still running but battle worn and got this one... most beautiful lines ever in a car in my opinion. I will let u know what happens! Blessings.

 

I've got a couple of these things if your looking for a replacement to prep before ripping the original out. I'll send you a quick PM.

 

I was just digging around under the hood of my '93 S-10 (which also is equipped with a 2.8).

I notice that the S-10 passenger side is equipped with this manifold:



Before examining my S-10, I was assuming that the thing connected to the manifold in this pic was piping to feed an EGR. As it turns out, my assumption was incorrect. That piping feeds the A.I.R. (smog pump) system. I guess that valve-thing on the pipe is some sort of anti-backfire valve or some such. So, the S-10 air-pipes into the exhaust manifold in a single fitting instead of the multiple fittings such as we have on our '88 cars. Of course, that doesn't change the fact that the Dorman product with the two metal plates seems to be designed to accomodate both A.I.R. and E.G.R.

Not trying to get too far out in the weeds on this one, but I wonder whether the '88-style A.I.R. exhaust manifold (with the three fittings) could be eliminated -- that is, the three fittings eliminated -- and a '93 S-10-style A.I.R. routing could be substituted?

 

Here is the A.I.R. System on the ‘93 S-10.

Located on passenger side.

No A.I.R. fittings on driver-side. Driver-side only has heated-air piping rising from collector on driver-side manifold feeding to snorkel on air cleaner housing.

Also, ignore flaky stuff on black hoses. Previous owner spray-painted most everything under the hood gloss-black. Paint is now beginning to flake off hoses in earnest.

 

I would just buy headers if your state allows it.