Knock Sensor - Third Generation F-Body Message Boards

91 RS Drop Top · 06-13-2008, 08:05 PM

Is there a way to tell if I have the correct Knock sensor? Is it stamped with a part number or something? Doers it look the same as the 305 KS? I have a 91 RS that had a 350 out of a truck (presumably an L05) put in it. I want to verify that they put the correct knock sensor in it. I'd rather not mess with changing it if I don't need to.

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doc · 06-14-2008, 12:36 AM

I think that you are correct in questioning this point. When a 305 is replaced with a 350, I believe one of the things that need to be done is install a 350 knock sensor. The 305 and 350 knock sensors are different.

Do a search, this is asked many times.

Ozz1967 · 06-15-2008, 02:31 PM

Quote:

Originally Posted by 91 RS Drop Top

Is there a way to tell if I have the correct Knock sensor? Is it stamped with a part number or something? Doers it look the same as the 305 KS? I have a 91 RS that had a 350 out of a truck (presumably an L05) put in it. I want to verify that they put the correct knock sensor in it. I'd rather not mess with changing it if I don't need to.

The 305 and 350 knock sensors do need to be changed to the proper motor size when the engine is swapped. However, they physically look the same and I didn't see any real labeling on them to be able to tell the difference.