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The two smaller pairs of letters on the left side of the tag should correspond to the embossed pairs of letters on the left side and right side tanks themselves on either side of the radiator. The larger pair of letters is for that particular combination of tanks. Those are the radiator unit ID that you’d see on a full build sheet. There are quite a few combinations used each year - different numbers of rows, A/C or not, 4 speed vs. auto and more. That’s a great find to still have your tag. They’re usually gone.
The two smaller pairs of letters on the left side of the tag should correspond to the embossed pairs of letters on the left side and right side tanks themselves on either side of the radiator. The larger pair of letters is for that particular combination of tanks. Those are the radiator unit ID that you’d see on a full build sheet. There are quite a few combinations used each year - different numbers of rows, A/C or not, 4 speed vs. auto and more. That’s a great find to still have your tag. They’re usually gone.
Terry
I wish it were mine...that's just a pic I used as an example. I actually am looking for a ZR tag.
Would the numbers on the left be the same for every tag? Also, I came across a pic of an actual ZR tag and there's also a series of numbers across the bottom. Any idea what they designate?
Last edited by 72455; February 8th, 2023 at 07:51 AM.
Thanks Joe. What about the numbers on the left? Also, is it me, or is there a second "4" along the bottom?
I haven't been able to figure out the larger numbers. I struggled with that phantom "4" for a while. If it's really there, it's a mis-strike. There's supposed to be a gap between the seven digit part number and the year.
The two letter code on the RH tank is different for those with AT cooler vs. those without. I've seen that number be anywhere from a single digit to three. At first I thought it might be a day number code, but apparently not.
IA is a very common small side tank code for Harrison radiators of that era. The large tanks vary quite a bit. Some GM muscle cars around 70 used the same large tank for both manual and auto trans cars. If it was used for a manual trans application, the trans cooler ports were filled with threaded brass plugs.
IA is a very common small side tank code for Harrison radiators of that era. The large tanks vary quite a bit. Some GM muscle cars around 70 used the same large tank for both manual and auto trans cars. If it was used for a manual trans application, the trans cooler ports were filled with threaded brass plugs.
Yes, the original radiator in my 70 W30 has the plugs in the cooler ports. Note that these are inverted flare plugs, not NPT plugs.
Ok...I'm going to look into having a replica made, so I need some measurements. I need the overall size of the tag, the width of the bends and the slot dimensions.
IA is a very common small side tank code for Harrison radiators of that era. The large tanks vary quite a bit. Some GM muscle cars around 70 used the same large tank for both manual and auto trans cars. If it was used for a manual trans application, the trans cooler ports were filled with threaded brass plugs.
Was Oldsmobile the only one who used the brass plugs for the manual transmission? I do have a 4 row radiator with no transmission cooling ports in a 1969 Vista Cruiser. I don't think its the original radiator but it does have the same two letter tank codes as the 4 row radiator in my 1969 442.
February 7th, 2023, 07:02 PM
