1967 heater hose fitting

[Albert C.]

I hade our car judged last month at the WIS reginals .One item was the heater hose fitting on the water pump did not have gruve marks on the long heater hose fitting. The judging giude states that there are marks one half inch down from the top of the fitting. My question is witch side is the top ? the thereded side or the side that the hose is installed ? .The picture in the guide dose not show the gruves.

AL CURTIS NCRS # 18808

[Edward J.]

Re: 1967 heater hose fitting

Al, There are konches on the heater hose fitting they are referring to is, each flat of the fitting where you tighten the fitting with a wrench , I believe this is what your referring to. You can duplicate this with a file. take a look at some of the venders web sites you should be able to see what they are talking about.

[Enzo C.]

Re: 1967 heater hose fitting

Hi Albert, I was at the same regional with my 67... I got the same deduct so we probably had the same judges... I just bought one on eBay for 25.00.. They say that there are single notch and double notch for late builds?? Not sure so I went with what the JM says .... Good luck

[Albert C.]

Re: 1967 heater hose fitting

Thanks Enzo is the notch closer to the hose side or the thereded side ?
Thanks AL CURTIS NCRS #18808

[Donald A.]

Re: 1967 heater hose fitting

Thanks Enzo is the notch closer to the hose side or the thereded side ?
Thanks AL CURTIS NCRS #18808

Not a great picture but the notch can be seen. I also was not aware of this until car was judged, I found this frozen water pump and bought it to get this fitting

Notch.jpg

[Enzo C.]

Re: 1967 heater hose fitting

image.jpg Hi Albert, here's a great pic with notches ... Hope this helps

[Gene M.]

Re: 1967 heater hose fitting

Al, There are konches on the heater hose fitting they are referring to is, each flat of the fitting where you tighten the fitting with a wrench , I believe this is what your referring to. You can duplicate this with a file. take a look at some of the venders web sites you should be able to see what they are talking about.

Use a triangle section file as the small notches are "V" shaped.......

[Joe L.]

Re: 1967 heater hose fitting

[ATTACH=CONFIG]64726[/ATTACH] Hi Albert, here's a great pic with notches ... Hope this helps

Enzo------


I believe these notches are a code for the manufacturer of the nipple. In other words, one radial set of notches denotes a certain manufacturer, 2 radial sets another. There may even have been a manufacturer denoted by NO notches. Were all of the nipples used on Corvettes supplied by the "1 notch" manufacturer? I sort of doubt it.

[Gene M.]

Re: 1967 heater hose fitting

Enzo------


I believe these notches are a code for the manufacturer of the nipple. In other words, one radial set of notches denotes a certain manufacturer, 2 radial sets another. There may even have been a manufacturer denoted by NO notches. Were all of the nipples used on Corvettes supplied by the "1 notch" manufacturer? I sort of doubt it.

Joe I believe you are correct since I've removed some pretty rusty stuff that sure seemed original with no notches......

[John D.]

Re: 1967 heater hose fitting

This same type of notch appears in the NOS service replacement AC GF-90 fuel filters. The ones that will get you a deduct at the shows. Not supposed to have the notch. Go figure.
By the way. On these water pump fittings not all the fittings have the notches on old pumps I have seen. But pumps are not my forte so I could be mistaken. The old pumps could have had auto store fittings.
QT: Does the 63 water pump fitting have this notch also? John

[Leif A.]

Re: 1967 heater hose fitting

Albert,
Does your '67 have factory A/C? If so, the heater hose nipple has a different configuration than the ones being shown. If your's is non A/C, the pics shown are correct. See attached for A/C nipple.

[Albert C.]

Re: 1967 heater hose fitting

Thanks everyone for your pictures and replys .
ALBERT CURTIS NCRS # 18808
1967 435 HP CONVERT TOP FLIGHT Wisconsin Midwest Regional

[Joe L.]

Re: 1967 heater hose fitting

Albert,
Does your '67 have factory A/C? If so, the heater hose nipple has a different configuration than the ones being shown. If your's is non A/C, the pics shown are correct. See attached for A/C nipple.

Leif-------


Well, sort of.

The picture you've posted is a photo of the GM #3849848. However, it's the second version of that part. I believe the original version had a hose barb configured like the one shown above on the long hex nipple. At some point, it was revised without a change in part number to the configuration you show. It's a rather moot point, though, because the hose barb cannot be seen when hoses are installed.

The 3849848 was used for small block C-60 applications from 1964 through at least 1970. Beginning in 1969 it was supposed to have been used for all non C-60 applications, too. However, at least for 1969, I don't think this occurred. My very late original owner 1969 without C-60 was equipped with the GM #3736495 which is the long hex nipple pictured above.

Big blocks with C-60 from 1966 through 1971 did not use the 3849848. Instead, they used the GM #3739798. This is a much shorter nipple for 3/4" hose with the early style hose barb.

The inlet manifold heater hose nipple was the same for all 1964-74. It was GM #3838094. It was a a short, 5/8" hose nipple with the early style hose barb.

From 1971 onward, it's hard to determine just what waterpump heater hose nipple was used. That's because I believe from 1971-onward the waterpump nipple was installed at the engine plant.

[Leif A.]

Re: 1967 heater hose fitting

As always, Joe, a wealth of knowledge. My June 1967 L79 w/C60 has the nipple as shown in my attachment.

[Bill L.]

Re: 1967 heater hose fitting

HI:

Just thought I would chip in here ---

67 coupe -- built in the first week of production in December of 1966 --- original car restored with original parts ---

See the photo --- no notches on the fitting ---

Screen Shot 2015-10-06 at 8.16.57 PM.jpg

Regards
Bill