Diving into header install (with pics)
07-02-2007, 01:22 PM
#1
From NY to AZ
Thread Starter
Join Date: Aug 2005
Location: Tempe, AZ
Posts: 578
Diving into header install (with pics)
Started out pulling off the intake and stock manifold, nothing too exciting, except I found a couple missing bolts on the intake side and a sheared off stud on the exhaust side.
The one thing I'm concerned with is that some of the cylinders seem to be running lean. There are barely any carbon deposits on the #1, #3,  exhaust runners. How big of a problem could I be looking at here?
Both manifolds are off, thats one greasy motor.
Stock exhaust manifold
Thats a lot of caked on crap
The exhaust ports
#1
#2
#3
#4
#5
#6
The one thing I'm concerned with is that some of the cylinders seem to be running lean. There are barely any carbon deposits on the #1, #3,  exhaust runners. How big of a problem could I be looking at here?
Both manifolds are off, thats one greasy motor.
Stock exhaust manifold
Thats a lot of caked on crap
The exhaust ports
#1
#2#3
#4#5
#6
07-06-2007, 05:38 PM
#2
From NY to AZ
Thread Starter
Join Date: Aug 2005
Location: Tempe, AZ
Posts: 578
Taking a closer look at the header, I noticed there are 2 ports, one for the o2 sensor and one for the EGR. It so happens my Z doesn't have the EGR system. I called MSA and the guy on the phone was trying to convince me that my Z must have an EGR system because all 280zx's came with it. My car is a 1980 model and unless someone swapped out the stock intake and exhaust in the past (doesn't seem that way) then my car never had an EGR system. My question now is, what should I do to plug up the EGR port on the header? What is the thread count on the nut - is it possible to find a fat bolt and just bolt that port shut?
07-06-2007, 07:00 PM
#3
Doesn't post much...
Join Date: Dec 2004
Location: Escondido (San Diego) California
Posts: 3,617
Originally Posted by 007max
Taking a closer look at the header, I noticed there are 2 ports, one for the o2 sensor and one for the EGR. It so happens my Z doesn't have the EGR system. I called MSA and the guy on the phone was trying to convince me that my Z must have an EGR system because all 280zx's came with it. My car is a 1980 model and unless someone swapped out the stock intake and exhaust in the past (doesn't seem that way) then my car never had an EGR system. My question now is, what should I do to plug up the EGR port on the header? What is the thread count on the nut - is it possible to find a fat bolt and just bolt that port shut?
No EGR means that somebody at some time in the past removed it...
Rod.
07-06-2007, 07:18 PM
#5
Big Poppa
Join Date: Jan 2005
Location: Mission, British Columbia
Posts: 4,499
i put a bolt in mine, the only thing is i forgot the count for the threads. you can get them at a specialty hardware store, not jus the regular autoparts places. take the header with you, they can measure it there, and get you the correct bolt.
07-07-2007, 12:09 AM
#6
Euro Z King
Join Date: Mar 2006
Location: Utrecht The Netherlands where owning a car is a CRIME!!
Posts: 387
Originally Posted by RodMoyes
... The guy at MSA was right.
No EGR means that somebody at some time in the past removed it...
Rod.
No EGR means that somebody at some time in the past removed it...
Rod.
07-07-2007, 12:19 AM
#7
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
I forget what, but I heard that there was a rarer intake that came off the 280ZX cars that didn't have an EGR valve. It was the P-82 intake that came out of a 280ZX. From what I can gather at least from HybridZ is that many of the 79' and 80' ZX intake manifolds were EGRless for some reason. I don't know if these people were from other countries I didn't pay attention to their locations, but my guess is your car hasn't been necessarily switched.
Last edited by duowing; 07-07-2007 at 12:27 AM.
07-09-2007, 08:38 AM
#12
^^^ and there it is! 
Originally Posted by duowing
I forget what, but I heard that there was a rarer intake that came off the 280ZX cars that didn't have an EGR valve. It was the P-82 intake that came out of a 280ZX.
07-09-2007, 08:43 AM
#13
From NY to AZ
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Join Date: Aug 2005
Location: Tempe, AZ
Posts: 578
Damn you guys are quick!
So, does anyone know what size bolt I need to plug that EGR port? I already have the header mounted and I don't feel like taking it out to go shopping for bolts at Lowe's
So, does anyone know what size bolt I need to plug that EGR port? I already have the header mounted and I don't feel like taking it out to go shopping for bolts at Lowe's
07-09-2007, 12:12 PM
#19
From NY to AZ
Thread Starter
Join Date: Aug 2005
Location: Tempe, AZ
Posts: 578
Originally Posted by duowing
Here's the amazing plug we ended up using to plug off the exhaust side of the EGR. It was all we could find in my friend's garage that fit.
07-12-2007, 05:43 PM
#25
From NY to AZ
Thread Starter
Join Date: Aug 2005
Location: Tempe, AZ
Posts: 578
Originally Posted by CWHammer
How bout this - shoot me an address, I'll send you the nut from an extra EGR tube I have and you can tap it for for what ever bolt you can find that will fit.
Originally Posted by duowing
I believe the head of it was 7/8ths or something right around that.
