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Knox Trailers · Cooling System
FRE66PTR
In stock · ships from Knoxville
This is a replacement radiator for Freightliner heavy‑duty trucks, typically featuring an aluminum core with plastic tanks (“PTR” likely stands for Plastic Tank Radiator).
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is designed to cool engine coolant by transferring heat to the air passing through the fins. You replace it when the original radiator starts leaking, gets clogged with debris, or suffers impact damage, which can cause engine overheating and reduced performance.
Part Number: FRE66PTR
RADIATOR
Dealer: Knox Trailers
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