coyotekk Posted September 26, 2008 Share #1 Posted September 26, 2008 I own a 81 280zx 2+2 and while racing my friend home something flew off my exhaust manifold!. At the next light I took off and noticed a very loud leak from under the hood. When I got home I noticed about a 1 1/2 in hole in the exhaust manifold where it comes of the head. I have no idea what was there. I have looked for pics of this part but have had no luck finding any. If anyone has any clue as to what this part is i would greatly apprieciate it. Thanks, Kurt Link to comment Share on other sites More sharing options...
sblake01 Posted September 26, 2008 Share #2 Posted September 26, 2008 (edited) EGR valve? Edited September 26, 2008 by sblake01 Link to comment Share on other sites More sharing options...
coyotekk Posted September 26, 2008 Author Share #3 Posted September 26, 2008 no thats not it. It's on the exhaust manifold above where it connects to the pipe. Link to comment Share on other sites More sharing options...
sblake01 Posted September 26, 2008 Share #4 Posted September 26, 2008 The only other thing I can think of is the exhaust gas sensor which is what Nissan called the front O2 sensor. Try an auto parts store because the OEM sensor is somewhat pricey from Nissan (if it's still available). About $35-$40 vs. about $115-$140. Link to comment Share on other sites More sharing options...
coyotekk Posted September 26, 2008 Author Share #5 Posted September 26, 2008 the O2 sensor is still there. it's on the manifold itself before it connectd to the pipe. Thanks for your help. Link to comment Share on other sites More sharing options...
sblake01 Posted September 26, 2008 Share #6 Posted September 26, 2008 (edited) Okay, I'll take one last attempt since I'm only guessing at this point. Could it be the metal tube that goes from the base of the EGR housing on the intake to the bung on the back of the exhaust manifold? If not, without a picture, I'm out of guesses. Edited September 26, 2008 by sblake01 Link to comment Share on other sites More sharing options...
coyotekk Posted September 26, 2008 Author Share #7 Posted September 26, 2008 I found out what it was. apparently someone relocated the o2 sensor to the pipe and pluged where it went on the exhaust manifold. I thank you so much for all your help. One more question, There are several manifolds for the 81 280zx. how do i know which one will fit my car? Link to comment Share on other sites More sharing options...
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