1972 power steering control vaue

[Jerome P.]

I am rebuilding the power steering control value on my '72. The value appears to be original. However, a question has come up in regards to the color/finish of both the 1) boot retainer and 2) hose shield. What finish/color was on the original pieces?

Jerry

[Harmon C.]

Re: 1972 power steering control vaue

I have seen silver color natural steel on what I thought was original valves. I have seen gold boot retainers in reproduction kits.

[Jerome P.]

Re: 1972 power steering control value

Any thoughts on the hose shield? My thought is that it would be natural silver also.

[Harmon C.]

Re: 1972 power steering control value

Any thoughts on the hose shield? My thought is that it would be natural silver also.

Both parts would be natural silver but not the same shade. I would say the boot retainer has a shine to it.

[Joe L.]

Re: 1972 power steering control vaue

I am rebuilding the power steering control value on my '72. The value appears to be original. However, a question has come up in regards to the color/finish of both the 1) boot retainer and 2) hose shield. What finish/color was on the original pieces?

Jerry

Jerry-----


The fact that the valve has a HOSE GUIDE (NOT a "hose shield") is pretty much proof that it's NOT an original valve. Corvettes didn't get the HOSE GUIDE until the 1975 model year. SERVICE valves for 63-74 applications also had the HOSE GUIDE after that time.

I have seen original boot retainers NATURAL STEEL as well as PAINTED BLACK (with the rest of the valve). I have never seen an original retainer plated with or without chromate dip ("gold").

[Jim S.]

Re: 1972 power steering control vaue

The 1976 7825636 valve and adapter drawing shows it being painted as a full assembly. The paint notes say the following:
A - Use Saginaw Code #4173 (semi-gloss black)
B - Plug valve ports using plastic shipping plugs.
C - All areas indicated by * I.E. pressure and return ports, ball stud, ball stud opening , and adapter threads to be free of paint.

So the boot clamp, the hose guide bracket, even the entire zerk fitting had paint on it.

Jim

[Jerome P.]

Re: 1972 power steering control value

Jerry-----


The fact that the valve has a HOSE GUIDE (NOT a "hose shield") is pretty much proof that it's NOT an original valve. Corvettes didn't get the HOSE GUIDE until the 1975 model year. SERVICE valves for 63-74 applications also had the HOSE GUIDE after that time.

I have seen original boot retainers NATURAL STEEL as well as PAINTED BLACK (with the rest of the valve). I have never seen an original retainer plated with or without chromate dip ("gold").

Joe, So if I am correctly understanding for a 1972 - both the boot retainer and the hose shield are natural steel in color, but can be painted black like the value.

Jeery

[Jim S.]

Re: 1972 power steering control vaue

I don't have the 1972 valve and adapter drawing but I am quite sure that the valve and adapter was painted as a full assembly in 1972. Saginaw hardly ever had cast iron parts painted and then performed machining or assembly operations on them. There were just too many chances for the paint to be damaged during machining and handling.

I would say that the boot retainer, zerk fitting, and even the rubber seal itself would have paint on them.

Jim

[Joe L.]

Re: 1972 power steering control value

Joe, So if I am correctly understanding for a 1972 - both the boot retainer and the hose shield are natural steel in color, but can be painted black like the value.

Jeery

Jerry-----


There was NO "hose shield" originally used for 1972 Corvettes. The retainer was either NATURAL STEEL or BLACK PAINTED (with the rest of the valve). Jim's information indicates that valves, including boot retainers and shields, from 1976 onward were black. I think that most were painted black before 1976, too, although I've seen a few "original" valves that had natural retainers, but it's possible these valves had been rebuilt. Many rebuilt valves are unpainted and those are easy to identify. However, some have the valve painted black BEFORE the boot and retainer are installed and those might be the ones that "fooled me".

GM SERVICE boot retainers are natural steel but use a bolt, spacer, and nut for closure. Many rebuilders use a "crimped-over" band-style retainer very similar to the ones used on GM PRODUCTION and SERVICE valves.

The "hose shield" was not painted black prior to 1975, since NO Corvette valves had this component prior to 1975. So, therefore, the issue of painting for this part is moot for 1963-74.

[Jim S.]

Re: 1972 power steering control vaue

Joe,
I expect that the 7825646 valve and adapter is the service part for 1963 through 1982 C2/C3s. Do you have a part number for the valve and adapter that was superceded by 7825646? I could try to obtain some of the earlier assembly drawings of the valve and adapter if I knew the part numbers.

BTW, I just noticed that there are two part numbers referenced on my drawing. They are 7819980 and 7816806. Those just might be the earlier part numbers.

Jim

[Terry M.]

Re: 1972 power steering control vaue

From a very late 1971 at the National COnvention. THis car received the BowTie award. I concentrated on the hoses because there was a long thread on that subject about a month ago.

Yes, the retainer and everything was painted black. We couldn't find any black paint on the rubber boot, but agter 35+ years it could have come off.

[Joe L.]

Re: 1972 power steering control vaue

Joe,
I expect that the 7825646 valve and adapter is the service part for 1963 through 1982 C2/C3s. Do you have a part number for the valve and adapter that was superceded by 7825646? I could try to obtain some of the earlier assembly drawings of the valve and adapter if I knew the part numbers.

BTW, I just noticed that there are two part numbers referenced on my drawing. They are 7819980 and 7816806. Those just might be the earlier part numbers.

Jim

Jim-----


Those are 2 of the earlier part numbers. Here's the breakdown:

1963-73----GM #5691955

1974-------GM #7816806

1975-------GM #7819980

1976-82----GM #7825636

I'd be very interested in learning the details of the earlier valves, especially the 7816806 and the 7819980. My particular interest is the hose guide, but other differences would be interesting, too.