HI As mentioned in earlier posts I ordered an aluminum crossflow rad for my 67 Impala. Took it to the shop to have it installed Friday and found out that the new aluminum rad did not have a transmission cooler. Went back to PI where I bought it and found out that to get a crossflow with a cooler would cost about 1300.00 ouch!!! They recommended a stand alone cooler similiar to the one that Mark posted about. I found that it covered too much of the rad area where I would have to mount it.
I really dont have a heavy duty need for a trans cooler so the stand alone seems like a little overkill.
So now I am going to get the original rad recored and hopefully I can convince the rad shop to put in a larger core with more cooling rows I think I currently have a 3 row rad.
The other thing missing would be a fan shroud. Im sure if I could find one I should be able to give up watching the temp guage in slow traffic.
Any thoughts..
Cliff
All that is left is to return the bundle of parts that I ordered..
Cliff, sorry to hear of your part mixup, but I think if you were to have the original rad (if its in decent shape) serviced by a shop (inspected, boiled out, black painted core, or recore) I think with a shroud with a better fan placed in the right position (2/3 in, 1/3 out), it should provide the cooling you'll need. A well engineered shroud is really the key here.
I plan on trying to use my smallish stock rad on my engine swap, and I'm confident that a well positioned shroud wih a better fan, combined with the stock rad (if in good shape) and Aux trans cooler should work here.
Cheers, Mark
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65 Laurentian post, 67 Grande Parisienne 4 door HT.
I'd have to ask what the problem was to start with. What engine are you running, were you running hot before, etc? I'm not sure, but I don't think the 67's used a shroud (but I think I'm thinking of a 67 Canadian Pontiac, possibly different than an Impala).
My 70 2+2 ran hot with the 454, so I put in a 4 core rad out of a big block air conditioned car. I had it recored, so just reused the top and bottom tank. It's worked fine since.
Think I have the "same" problem with the Catalina, will run all day at 165 to 170 F on the hottest day but get caught in traffic or waiting in line at border & just sit there watching the guage going higher & higher!! I've put a shroud on from a A/c car, 7 blade fan from 4 & triple core rad. Still does the same thing!!! I'm either going to try a "electric fan" or learn to live with it!! As soon as you start to move at a steady rate, temp will fall from 225 + to 165F in a very short time?????
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Some times I wake up GRUMPY, but today I let her sleep in !!!!!!!!BLACKSTOCK Ont.
Although crossflow rads were being introduced in the 1960s, starting with Corvettes, the 1965 Cadillacs, they were not introduced on full-sized Chevies or Canadian Pontiacs until after 1970. The 1970 Big Chevrolet & Big Canadian Pontiacs were the last to hold out with the downflow radiator style. Acadians & Beaumonts got the crossflow style for 1968.
If you get your original rad recored, don't go overboard on the number of "rows of cores". The theory is by adding cores you increase the cooling area, but the reality is there is a law of diminishing returns. The added density of fins & rows means that air doesn't flow as easily as it would through a rad that wasn't stuffed full of cooling fins. That, plus heat is getting thrown off at the first row, so that by the time it flows through the 4 row the tempurature difference between the cooling air and the radiator fins decreases, slowing the heat transfer & efficiency. Like I said, diminishing returns. I would make sure that you use the full width of the rad for cooling fins though, but you probably don't need to go more than 3 core. Most standard rads back then were only 2 core.
A fan shroud will help, especially if the fan & shroud opening are correctly oriented (fan is placed at the right depth & shroud optimally placed to match the fan depth). The shroud helps most when the car is stationary and doesn't have air pushing into the engine compartment. A shroud will force the fan to draw air through the rad rather than from in behind it.
-- Edited by CdnGMfan on Sunday 13th of May 2012 07:19:04 PM
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67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.
In garage, 296 cid inline six & TH350...
Cam, Toronto.
I don't judge a man by how far he's fallen, but by how far back he bounces - Patton
Pete That's pretty much the situation that I have.
I checked Antique Chev web site and they showed a sketch of an aluminum rad that looked like a direct fit. I will check this out tomorrow.. I was in Dundas today... to bad they weren't open..
I have re-cored two radiators for my old cars. Both were original equipment 2 row core rads. I went with what the rad man called a 3 row high efficiency core. This 3 row design has almost as many tubs and fins as the old 4 row cores did. Cost was in the 400$ range, so not cheap but I liked the original appearance versus using an aluminium rad. I am pleased with the performance, no temperature issues, even on the hottest days.
I have re-cored two radiators for my old cars. Both were original equipment 2 row core rads. I went with what the rad man called a 3 row high efficiency core. This 3 row design has almost as many tubs and fins as the old 4 row cores did. Cost was in the 400$ range, so not cheap but I liked the original appearance versus using an aluminium rad. I am pleased with the performance, no temperature issues, even on the hottest days.
Vaughan
That's what I had "built" for the 52 but haven't got to drive it yet other than a "blast" up the street!!! your news sounds "encouraging" though Thanks
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Some times I wake up GRUMPY, but today I let her sleep in !!!!!!!!BLACKSTOCK Ont.
