82 oil fill neck (seal to valve cover)

[Dave H.]

I had to (or perhaps thought I had to) remove the oil fill neck to wiggle my driver's side valve cover out of the 82. I am replacing the cover gasket. During cleanup I noticed that the fill neck was previously sealed to the valve cover with RTV over what I assume was the original seal. Questions:
1. Was the orig seal an o-ring?
2. Was it a round piece of hard black plastic (like an o-ring, but hard, having flats on both sides)?
3. Where can I get another (Chevy has discontinued the seal)?

I have fabricated a similar o-ring seal (cut and glued), but before I reassemble, I am looking for guidance.

I have not looked in my assy manual , because the wife has hidden it from me again...along with my socks!

Thanks, Dave

[Joe L.]

Re: 82 oil fill neck (seal to valve cover)

I had to (or perhaps thought I had to) remove the oil fill neck to wiggle my driver's side valve cover out of the 82. I am replacing the cover gasket. During cleanup I noticed that the fill neck was previously sealed to the valve cover with RTV over what I assume was the original seal. Questions:
1. Was the orig seal an o-ring?
2. Was it a round piece of hard black plastic (like an o-ring, but hard, having flats on both sides)?
3. Where can I get another (Chevy has discontinued the seal)?

I have fabricated a similar o-ring seal (cut and glued), but before I reassemble, I am looking for guidance.

I have not looked in my assy manual , because the wife has hidden it from me again...along with my socks!

Thanks, Dave

Dave------


I am not aware that 1982's originally used an oil fill tube. I thought the oil filler cap mounted directly to the valve cover. Can you post a photo of what you have?

Checking further, there apparently was an oil fill tube used for 1982 Corvettes. It was GM #14047081 and was sort of a "S" shaped tube, apparently used to make access to the oil fill easier considering the large TBI air filter. However, I cannot find than any gasket was ever available separately from GM for this tube. There was what GM describes as a "nut", GM #14047089, but it's long-since GM-discontinued.

1982 also used a special and unique oil filler cap of GM #14047082. However, I do not know how it differed from earlier caps. It's also long-since GM discontinued.

[Dave H.]

Re: 82 oil fill neck (seal to valve cover)

Dave------


I am not aware that 1982's originally used an oil fill tube. I thought the oil filler cap mounted directly to the valve cover. Can you post a photo of what you have?

Checking further, there apparently was an oil fill tube used for 1982 Corvettes. It was GM #14047081 and was sort of a "S" shaped tube, apparently used to make access to the oil fill easier considering the large TBI air filter. However, I cannot find than any gasket was ever available separately from GM for this tube. There was what GM describes as a "nut", GM #14047089, but it's long-since GM-discontinued.

1982 also used a special and unique oil filler cap of GM #14047082. However, I do not know how it differed from earlier caps. It's also long-since GM discontinued.

Joe, yes this is the "S" tube. There is a shallow o-ring groove on the bottom side of the 14047082 nut. So shallow that I assumed that it was NOT for an o-ring, as it is not deep enough to retain the o-ring without it dropping off. Of course, a bit of vacuum grease or Vaseline will cure this ailment. It is probable that the 14047082 is a nut assy that included an o-ring (or whatever this seal is/was).

USMILVET over on the Corvetteforum posed that he thought it was an o-ring. I will probably press forward with that approach unless someone comes up with additional info.

As to the oil cap...I don't know what I have. I assume it is the original, but it has no markings on it, other than "assembled in Mexico" on the underside. It fits tight and is in good condition.

Thanks, Dave

[Joe L.]

Re: 82 oil fill neck (seal to valve cover)

Joe, yes this is the "S" tube. There is a shallow o-ring groove on the bottom side of the 14047082 nut. So shallow that I assumed that it was NOT for an o-ring, as it is not deep enough to retain the o-ring without it dropping off. Of course, a bit of vacuum grease or Vaseline will cure this ailment. It is probable that the 14047082 is a nut assy that included an o-ring (or whatever this seal is/was).

USMILVET over on the Corvetteforum posed that he thought it was an o-ring. I will probably press forward with that approach unless someone comes up with additional info.

As to the oil cap...I don't know what I have. I assume it is the original, but it has no markings on it, other than "assembled in Mexico" on the underside. It fits tight and is in good condition.

Thanks, Dave

Dave------


I think the o-ring will work well, whether or not that was what was originally used. And, no one will ever know the difference.

By 1982 a lot of GM parts were being made in Mexico. So, that source does not imply a non-original part.