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Post by scottyaurorav8 on Jun 16, 2019 6:46:36 GMT -6
Does anyone know if the exhaust manifolds from any 1st Gen Aurora or Seville/Deville from those same years, will fit a 2nd Gen Aurora? Put aside the fact the 2nd Gen Aurora exhaust manifolds have that extra little pipe to connect to the EGR tube, I just need to know as far as the fitment itself to the crossover and exhaust pipe and the fitment to the heads. Will it all line up and fit properly?
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tigger
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Post by tigger on Jun 16, 2019 13:19:49 GMT -6
Never tried it, but I'd guess they would bolt up.
The exhaust manifolds for the '98-'04 Seville and the '01-'03 Aurora are the same part #s (the Deville and Eldo use these part #s after '00). But the crossover has been the same part # since 1996, haha!
Only one way to find out, and may I ask why?
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RCA1186
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Rob
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Post by RCA1186 on Jun 17, 2019 8:47:08 GMT -6
Never tried it, but I'd guess they would bolt up. But the crossover has been the same part # since 1996, haha! Same horrible design for that many years huh haha |
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Post by scottyaurorav8 on Jun 17, 2019 21:35:43 GMT -6
Just waiting for northstar performance pcm tuning and then I can finally get the EGR delete and rid the engine of all that vacuum hose and egr crap. Make it look clean and more space in the engine bay.
Rather than cut off the little egr pipe on the manifolds and weld the holes up. I know the 1st gens dont come with them. Trying to see if they bolt up the same so it would be an easy swap...
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RCA1186
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Post by RCA1186 on Jun 18, 2019 12:36:46 GMT -6
Where do you see that they don't come with them on 1G? Not denying, just curious. As far as I know they do... I know classics definitely have an EGR system, unless you're saying where it attaches isn't the manifold. I know Josh did an EGR delete when he re-built his engine (1G) I also deleted the egr system. Just pulled off the tube running from the exhaust to the water crossover, found that a penny is the perfect size and sealed it up with some JB weld.  Unless that's the crossover and not the manifold. Looks like the manifold to me though |
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Post by scottyaurorav8 on Jun 18, 2019 20:33:01 GMT -6
Hmmm yea i guess I'd need to confirm indefinately. But when i look on eBay. I see 93-95' Seville exhaust manifolds. They dont have that extra little tube when I see the pictures...
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RCA1186
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Post by RCA1186 on Jun 19, 2019 6:20:54 GMT -6
That I couldn't tell you.
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tigger
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Post by tigger on Jun 19, 2019 15:51:39 GMT -6
Ohhh, I know what you're talking about now.
Those "little tubes" on the exhaust manifolds aren't for the EGR system. They're for the secondary air injection system. So yeah, earlier Northstar manifolds won't have them.
The EGR "tube" connects to the crossover just before the Y pipe.
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Post by scottyaurorav8 on Jun 20, 2019 5:53:34 GMT -6
Ohhh okay. I was thinking different. When I look at my engine, I see an EGR unit in front of my front side valve cover, then I see another EGR unit behind my backside valve cover. Each EGR unit has a silver flex pipe extended from it and I thought each of those flex pipes connect to each of the exhaust manifolds "little tubes." Then with all the vacuum lines coming from the EGR, one ties into the throttle body. Do the vacuum lines also tie into the secondary air pump?
So I figured if this EGR delete tune becomes available. I can get rid of it ALL.. I figured I would be able to remove both EGR units, the little tubes from each exhaust manifold and weld them closed, remove all the vacuum lines that come with the EGR system, dremel off the throttle body vacuum line extension and just JB weld it off, then remove all the secondary air pump crap. So i am completely off then on this huh? LOL
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tigger
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Post by tigger on Jun 20, 2019 11:05:12 GMT -6
EGR and Secondary Air Injection are totally separate systems. EGR lets exhaust into the intake, SAI puts fresh air into the exhaust manifold.
What you are calling "EGR units" are check valves for the SAI system. The SAI pump pushes air to each of the valves, the vacuum lines are used to open/close the valves. At startup, the PCM commands the pump on and the valves open. This forces air through the valve, down the flex pipe, and into the manifold. After about 30 or so seconds, pump turns off and the check valves close.
The actual EGR valve is mounted by the throttle body and only has the one flex tube connected to the exhaust. No vacuum lines.
I suppose the engine would run fine without either system, but the CEL might be hard to get rid of, haha...
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Post by Marc on Jun 20, 2019 17:22:37 GMT -6
but the CEL might be hard to get rid of, haha... It would take some really, really skilled retuning of the PCM to do that, IMHO. |
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