Exhaust flange/exhaust to headers torque spec
Thread Starter
Staging Lane
Joined: Aug 2019
Posts: 97
Likes: 5
Exhaust flange/exhaust to headers torque spec Hi I just installed a fresh rebuilt shortblock ls1 on my 98 camaro. I’m going fully stock expect slp exhaust. I did my first test drive after warming it up and changing oil and well I got 2 codes p0131 and p0171 which is running lean and problem with 02 sensor. I wont lie I bullshited my exhaust bolts and well
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I was hoping someone can tell me the torque spec for the 6 bolts 3 on each side that connect the exaust/cats to the headers.
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Thank you I hate that I ran a fresh motor while it was lean for like 10 miles and I did a few small pulls to 4500 rpm… Someone please assure me my motor is still fine lol. I think my plan is to make sure the flanges are torqued and if I still have code I’ll replace sensors. Thank you for any input as this is my first build.
———————————————————-
I was hoping someone can tell me the torque spec for the 6 bolts 3 on each side that connect the exaust/cats to the headers.
————————————————————
Thank you I hate that I ran a fresh motor while it was lean for like 10 miles and I did a few small pulls to 4500 rpm… Someone please assure me my motor is still fine lol. I think my plan is to make sure the flanges are torqued and if I still have code I’ll replace sensors. Thank you for any input as this is my first build.
Thread Starter
Staging Lane
Joined: Aug 2019
Posts: 97
Likes: 5
Hi I just installed a fresh rebuilt shortblock ls1 on my 98 camaro. I’m going fully stock expect slp exhaust. I did my first test drive after warming it up and changing oil and well I got 2 codes p0131 and p0171 which is running lean and problem with 02 sensor. I wont lie I bullshited my exhaust bolts and well
———————————————————-
I was hoping someone can tell me the torque spec for the 6 bolts 3 on each side that connect the exaust/cats to the headers.
————————————————————
Thank you I hate that I ran a fresh motor while it was lean for like 10 miles and I did a few small pulls to 4500 rpm… Someone please assure me my motor is still fine lol. I think my plan is to make sure the flanges are torqued and if I still have code I’ll replace sensors. Thank you for any input as this is my first build.
———————————————————-
I was hoping someone can tell me the torque spec for the 6 bolts 3 on each side that connect the exaust/cats to the headers.
————————————————————
Thank you I hate that I ran a fresh motor while it was lean for like 10 miles and I did a few small pulls to 4500 rpm… Someone please assure me my motor is still fine lol. I think my plan is to make sure the flanges are torqued and if I still have code I’ll replace sensors. Thank you for any input as this is my first build.
Joined: Nov 2001
Posts: 34,647
Likes: 2,574
From: Schiller Park, ILL Member: #317
FWIW, unless you left those bolts really loose (or used bad gaskets/poor sealing surfaces) then I don't think that's the source of your problem. I say this because I have removed and installed the exhaust at that connection point (manifolds to cats, using fresh factory gaskets) many times in the past without using a TQ wrench, and never once did I have a leak or lean (or any other) codes.
Obviously, it's best to follow all the proper torque specs but, in this instance, unless something is obviously leaking I don't think that's the source of your issue (in my experience).
Obviously, it's best to follow all the proper torque specs but, in this instance, unless something is obviously leaking I don't think that's the source of your issue (in my experience).
