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1- Is this top rad plate correct for a 71 442 with 455 non AC (actual engine is a 70), auto trans? (first pic), if not, is second picture correct for a 2-3 row rad for the same car ?
2- I think my shroud number 6261917 is a chevelle thing right ?, which one (number) would I need to put it back stock ?
3- The water pump is about 5 1/2" long, and casting number is approx. 409xxxx9, is this correct for stock application ?
4- Is it really a 2 row rad ? (3rd picture),
5- What would be the dimension of a stock rad ? L x W x H. If the actual one is ok I can just put 3 row if it's a 2 row.
6- Is 50/50 coolant/water is ok for summer for best cooling ?
If you want to take advantage of the increased heat capacity of water, drop the ratio to 25-30% antifreeze and the rest water. I used to do that for our 115+ summer temps, but I never saw any difference in operating temperatures compared to a 50/50 mix.
The original radiator for a 1971 442 with 455, non-A/C, and 3.23 or lower numerical axle would have been an SZ code P/N 3024632. This car would not have come with a fan shroud and would have used top plate P/N 407118, which would have looked like the first one, but since the car didn't come with a fan shroud, it should not have those holes for mounting the shroud (which have obviously been added to that plate). Cars with A/C, HD cooling, or 3.73 rear axle would have come with shroud P/N 410640 and used top plate P/N 407120, which looks like the second photo.
Correct. I was over-simplifying. 1971 Y72 cars got the four row radiator. The three row radiator on 442s used asymmetric tanks that year. Note in the lower table that the top plate P/N is the same, however. It was originally 407116, same as the three row on lesser Cutlii and changed to 407120 to accommodate the asymmetric radiator tanks.
C60 and 3.73 cars got the three row radiator with two different sized tanks, as evidenced by the different RH/LH radiator insulators on those cars.
If you want to take advantage of the increased heat capacity of water, drop the ratio to 25-30% antifreeze and the rest water. I used to do that for our 115+ summer temps, but I never saw any difference in operating temperatures compared to a 50/50 mix.
The original radiator for a 1971 442 with 455, non-A/C, and 3.23 or lower numerical axle would have been an SZ code P/N 3024632. This car would not have come with a fan shroud and would have used top plate P/N 407118, which would have looked like the first one, but since the car didn't come with a fan shroud, it should not have those holes for mounting the shroud (which have obviously been added to that plate). Cars with A/C, HD cooling, or 3.73 rear axle would have come with shroud P/N 410640 and used top plate P/N 407120, which looks like the second photo.
Nice explanation, thanks, your are an encyclopedia Mr Joe.
The original radiator for a 1971 442 with 455, non-A/C, and 3.23 or lower numerical axle would have been an SZ code P/N 3024632. This car would not have come with a fan shroud and would have used top plate P/N 407118, which would have looked like the first one, but since the car didn't come with a fan shroud, it should not have those holes for mounting the shroud (which have obviously been added to that plate). Cars with A/C, HD cooling, or 3.73 rear axle would have come with shroud P/N 410640 and used top plate P/N 407120, which looks like the second photo.
Joe, you mentioned: ...."and would have used top plate P/N 407118, which would have looked like the first one"
Do you mean the first one is not quite like the original ?
Correct. I was over-simplifying. 1971 Y72 cars got the four row radiator. The three row radiator on 442s used asymmetric tanks that year. Note in the lower table that the top plate P/N is the same, however. It was originally 407116, same as the three row on lesser Cutlii and changed to 407120 to accommodate the asymmetric radiator tanks.
C60 and 3.73 cars got the three row radiator with two different sized tanks, as evidenced by the different RH/LH radiator insulators on those cars.
Found what all the codes mean, but not sure for G89, is it 3.73 axle ?
The original radiator for a 1971 442 with 455, non-A/C, and 3.23 or lower numerical axle would have been an SZ code P/N 3024632. This car would not have come with a fan shroud and would have used top plate P/N 407118, which would have looked like the first one, but since the car didn't come with a fan shroud, it should not have those holes for mounting the shroud (which have obviously been added to that plate). Cars with A/C, HD cooling, or 3.73 rear axle would have come with shroud P/N 410640 and used top plate P/N 407120, which looks like the second photo.
Mr. Joe, where could I get a new correct stock looking 3024632 radiator, can't find anything, or should I rebuild a used one if I find one ?
May 22nd, 2024, 03:26 PM
