It really only cools the engine some when you’re forcing air through it with the heater blower fan on. Just as much as you’d expect a tiny radiator to cool a large passenger car engine, not much.
Otherwise no.
Bypassing it is fine. Think about how the factory built some cars with heater delete, bypassed completely because they had no heater core.
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/3.08
2002 WS6 Convertible LS1/4L60E/3.23
1966 VW Type 2 Single Cab Pickup 140hp 2276
1956 VW Type 2 Panel Van 36hp 1200
1957 VW Type 1 Beetle 180hp 2276
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