1986 knock sensor recall ?

[Peter M.]

I have been told that there was an engine knock sensor recall for 1986 Vettes sometime in 1987 or 1988. Can anyone point me in the right direction to find this GM Bulletin? Here is a photo of the OEM sensor and a dealer installed fix. Any help will be appreciated.

[Paul O.]

Re: 1986 knock sensor recall ?

Peter I checked the NHTSA for service bulletins and Recalls you can check also on line. They showed no recall or S/B for 1986 Corvette knock sensor. Paul 18046

[Peter M.]

Re: 1986 knock sensor recall ?

Peter I checked the NHTSA for service bulletins and Recalls you can check also on line. They showed no recall or S/B for 1986 Corvette knock sensor. Paul 18046

Thanks, Paul.

I have been told that this was a silent recall only for 86-89 owners who complained about high RPM engine miss & knock. Further, the reported fix was susposedly the installation of p/n 16038331 knock module. Of course, I don't know if this is correct. How might I find out for sure? AND, how would one discover the details of a silent recall? Any help will be greatly appreciated.

Thanks,

P.

[Terry M.]

Re: 1986 knock sensor recall ?

Thanks, Paul.

I have been told that this was a silent recall only for 86-89 owners who complained about high RPM engine miss & knock. Further, the reported fix was susposedly the installation of p/n 16038331 knock module. Of course, I don't know if this is correct. How might I find out for sure? AND, how would one discover the details of a silent recall? Any help will be greatly appreciated.

Thanks,

P.

Pete,
It sounds like you are referring to a TSB (Technical Service Bulletin). If that is the case is is NOT a recall -- the real name of which is a Campaign. Now all you need to do is find someone with a collection of C4 TSBs. NCRS once did, but that is a "once upon a time" story. I am not sure how far back the Chevrolet Dealer World information goes, but someone connected to a dealership might be able to find it if the Chevrolet SI information goes back that far -- a big IF.

[Peter M.]

Re: 1986 knock sensor recall ?

Pete,
It sounds like you are referring to a TSB (Technical Service Bulletin). If that is the case is is NOT a recall -- the real name of which is a Campaign. Now all you need to do is find someone with a collection of C4 TSBs. NCRS once did, but that is a "once upon a time" story. I am not sure how far back the Chevrolet Dealer World information goes, but someone connected to a dealership might be able to find it if the Chevrolet SI information goes back that far -- a big IF.

Thanks, Terry. I'll keep looking for it.

P.

[Dick W.]

Re: 1986 knock sensor recall ?

Pete,
It sounds like you are referring to a TSB (Technical Service Bulletin). If that is the case is is NOT a recall -- the real name of which is a Campaign. Now all you need to do is find someone with a collection of C4 TSBs. NCRS once did, but that is a "once upon a time" story. I am not sure how far back the Chevrolet Dealer World information goes, but someone connected to a dealership might be able to find it if the Chevrolet SI information goes back that far -- a big IF.

Terry, et al, I believe those TSB's reside in the NCRS archives that are temporarily housed in the AACA Library. You could check with them, but be aware there is an hourly charge for research

[Terry M.]

Re: 1986 knock sensor recall ?

Terry, et al, I believe those TSB's reside in the NCRS archives that are temporarily housed in the AACA Library. You could check with them, but be aware there is an hourly charge for research

I don't want to get in a public urinating match with you Dick, but no they don't. Trust me I was there when the NCRS archives were packaged for delivery to the AACA. I know you were there also, but I remember where the TSBs went, and it was right outside the door where we were working. And I remember who it was who directed their disposition.

I hope I am wrong, and I will publicly apologize if I am. I have been maintaining the TSBs since we were there in Cincinnati, but I believe what I have is what NCRS has. Maybe we all will find out for sure in a couple of months -- Hope, hope.

[Pat M.]

Re: 1986 knock sensor recall ?

I have the "Corvette Specs" 84-96 C4 book by Antonick and if memory serves it has a LONG list of service bulletins in the back of the book.

[Jim T.]

Re: 1986 knock sensor recall ?

Peter how many knock sensors does your 1986 have? My 85 only has one knock sensor and it is located on the passenger side? My 85 has the cooling system option and part of this system is installed in the block on the drivers side in the block drain access. My 85's knock sensor is located in the block drain on the passenger side.

[Edward J.]

Re: 1986 knock sensor recall ?

Peter, that wire you are showing in the cylinder head I believe is the cooling fan temp sensor , the knock sensor is mounted in the block,the knock sensor wire color is blue and the cooling fan temp. switch wire should be green (maybe with a with tracer)


The wire splice connector does not look like a gm.style , maybe the wire harness connector is a gm, those connectors were subject to alot of heat from the manifold and if was ever removed it could of broke, they tend to get brittle after a few years.

I was working for a chev. dealer around that time I do not recall any recalls for knock sensors, they were a pretty reliable part.

[Patrick N.]

Re: 1986 knock sensor recall ?

Hi Peter,

I have my copy of "Vette Specs" handy today which has a list of all C4 TSB and campaing notices. I did a quick search and did not see a knock sensor issue but I am sure it is imbedded in a dif heading.

Do you have any other clues to help me track this down?

Pat

[Edward J.]

Re: 1986 knock sensor recall ?

Peter, my auto shop has All Data, did a search also, no campigans, or recalls , nothing noted for knock sensor problems ,or harness replacements.

Are there any problems you maybe experiencing with the car? or is it just the wire that was replaced?