Have An Original Harrison 4 Core Radiator In Your 69-70?/If Yes Please Read This
If you have an original #'s matching 69-70 ss 396 with man trans that has the original Harrison 4 core radiator in it could you please take a couple mins to count the tubes going accross from top to bottom to see if its 39 or 30?
I have a 1969 chevelle ss 396 and would like to know exactly how may tubes the 3 core & 4 core Harrison radiators had counting from top to bottom,was it 30 or 39 for the original Harrison 4 core (3 core also)unit? I need to be 100% correct on that tube count for the radiator. I realize that would be x 3 or x4 depeding on if 3 or 4 core radiator for the full tube counts.
I was asking because i had seen info here in t/c that stated the original 4 core Harrison radiators had approx 39 tubes x 4 for total count but that the replcement 4 core units built in past like 10 yrs or so had less tubes like approx 30 tubes x 4.
So the older Harrison 4 core rads had a total of 39x4=156 tubes and the later replacement 4 core rads have less cooling tube efficiency with 30x4=120 tubes,thats approx 20-22%% less cooling efficiency right off the bat if that's true.
The 4 core rad currently in my 69 velle i bought 25 yrs ago has approx 30 tubes top to bottom for 120 total.
If thats true i would like to locate a real original Harrison rad with the 39 tubes to drop in the velle,i bet that will be a pricey proposition to say the least.I have just about never see one for sale for man trans without an internal trans cooler,i have only seen a couple for auto trans and those may not have had the supposedly correct 39 tubes for the original harrison 4 core rad.
That's the only non-original part i dont have for my #'s matching car at this point after buying it from the original owner almost 30yrs ago. I very stupidly like 25 yrs ago when i was a young buck never realizing i would own the car so long and how the value would skyrocket pulled the orginal 3 core rad from my car to drop in a new replcement 4 core rad for better cooling. I put that 3 core rad in my fathers car when his rad pooped out and that was the last i saw of it. But it seems even back 25 yrs ago when i got the Modine rep 4 core rad they had already reduced the top to bottom tube count on the 4 core replcement radiators from 39 to 30 becasue thats what it came with,30 tubes & not 39 if thats really true.
If what i have read was true the 4 core rad's originally came with 39 tubes from Harrison rad company,can any one verify this this fact or shed some more light on it esp if you have a known original #'s matchihg 1969-1970 396 chevelle ss with an original Harrison manual trans 3 or 4 core radiator?
I believe the 3 & 4 core Harrison radiators would have the same top to bottom tube counts,its just that the 4 core would have a 4th row of tubes stacked in front of the exisiting 3 core tubes to make it a 4 core unit.
Did all 4 core rads in 69-70 chevelles come with the special rad cover that was cut/trimmed to have a special tab tack welded to it for better fit over the thicker 4 core radiator? Did this special cover also have a hole in it with a nut tack welded under the hole to attach some kind of duct work on the top of it for chevelles? I have an nos 4 core rad cover with the special tab but i think it mak be off like an olds / caddy/ponitac that may have used or had some kind of dust work or AC hose that was attached to that blind nut welded under the cover. I am thinking this because i dont remember ever seeing anything on a chevelle that would come close to being attached to the rad cover at that spot . I am trying to verify if that cover is in fact correct for my car becasue i was told it was but i cant verify it with all the gm info i have,maybe someone else knows the correct pt# for the special 4 core radiator cover on a 69 chevelle ss 396 like mine.
I want to be sure of this 39 to 30 tube issue with 4 or 3 core radiators before i invest in what will likely be a pricey deal if i find an original Harrison 3 or 4 core rad. I just want to be sure of correct tube count before i buy one in the future and possibly get burnt with new lower count core with original Harrison tanks attached to it put off as an original rad when only the tanks are truely original and i over pay to stillnot have the correct rad for the car.
Thanks....scott
If you have an original #'s matching 69-70 ss 396 with man trans that has the original Harrison 4 core radiator in it could you please take a couple mins to count the tubes going accross from top to bottom to see if its 39 or 30?
I have a 1969 chevelle ss 396 and would like to know exactly how may tubes the 3 core & 4 core Harrison radiators had counting from top to bottom,was it 30 or 39 for the original Harrison 4 core (3 core also)unit? I need to be 100% correct on that tube count for the radiator. I realize that would be x 3 or x4 depeding on if 3 or 4 core radiator for the full tube counts.
I was asking because i had seen info here in t/c that stated the original 4 core Harrison radiators had approx 39 tubes x 4 for total count but that the replcement 4 core units built in past like 10 yrs or so had less tubes like approx 30 tubes x 4.
So the older Harrison 4 core rads had a total of 39x4=156 tubes and the later replacement 4 core rads have less cooling tube efficiency with 30x4=120 tubes,thats approx 20-22%% less cooling efficiency right off the bat if that's true.
The 4 core rad currently in my 69 velle i bought 25 yrs ago has approx 30 tubes top to bottom for 120 total.
If thats true i would like to locate a real original Harrison rad with the 39 tubes to drop in the velle,i bet that will be a pricey proposition to say the least.I have just about never see one for sale for man trans without an internal trans cooler,i have only seen a couple for auto trans and those may not have had the supposedly correct 39 tubes for the original harrison 4 core rad.
That's the only non-original part i dont have for my #'s matching car at this point after buying it from the original owner almost 30yrs ago. I very stupidly like 25 yrs ago when i was a young buck never realizing i would own the car so long and how the value would skyrocket pulled the orginal 3 core rad from my car to drop in a new replcement 4 core rad for better cooling. I put that 3 core rad in my fathers car when his rad pooped out and that was the last i saw of it. But it seems even back 25 yrs ago when i got the Modine rep 4 core rad they had already reduced the top to bottom tube count on the 4 core replcement radiators from 39 to 30 becasue thats what it came with,30 tubes & not 39 if thats really true.
If what i have read was true the 4 core rad's originally came with 39 tubes from Harrison rad company,can any one verify this this fact or shed some more light on it esp if you have a known original #'s matchihg 1969-1970 396 chevelle ss with an original Harrison manual trans 3 or 4 core radiator?
I believe the 3 & 4 core Harrison radiators would have the same top to bottom tube counts,its just that the 4 core would have a 4th row of tubes stacked in front of the exisiting 3 core tubes to make it a 4 core unit.
Did all 4 core rads in 69-70 chevelles come with the special rad cover that was cut/trimmed to have a special tab tack welded to it for better fit over the thicker 4 core radiator? Did this special cover also have a hole in it with a nut tack welded under the hole to attach some kind of duct work on the top of it for chevelles? I have an nos 4 core rad cover with the special tab but i think it mak be off like an olds / caddy/ponitac that may have used or had some kind of dust work or AC hose that was attached to that blind nut welded under the cover. I am thinking this because i dont remember ever seeing anything on a chevelle that would come close to being attached to the rad cover at that spot . I am trying to verify if that cover is in fact correct for my car becasue i was told it was but i cant verify it with all the gm info i have,maybe someone else knows the correct pt# for the special 4 core radiator cover on a 69 chevelle ss 396 like mine.
I want to be sure of this 39 to 30 tube issue with 4 or 3 core radiators before i invest in what will likely be a pricey deal if i find an original Harrison 3 or 4 core rad. I just want to be sure of correct tube count before i buy one in the future and possibly get burnt with new lower count core with original Harrison tanks attached to it put off as an original rad when only the tanks are truely original and i over pay to stillnot have the correct rad for the car.
Thanks....scott
