What is a radiator core (and how do you tell if it is a 2, 3, or 4 core)? I've done a search on this topic (both here and at howstuffworks.com) but still do not really understand it. Are the cores in the tanks on the sides of the radiator?
the "core" is the part with all the fins on it that actually does the cooling. when it says it has a 3 core, for example, it means there are 3 rows of cooling tubes going across(or down, depending how it is set up)the radiator. more "cores" genarally means more cooling capacity. it is easy to figure out how many "cores" a radiator has. just take off the cap and count how many tubes make up the thickness of the radiator, front to rear.2 cores seems to be the norm, with 3 and 4 cores in "heavy duty" applications, like trucks or hi perf cars or cars with air conditioning.
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