The T680 CAC varies by year and engine — PACCAR MX-13, MX-11, and Cummins ISX each use a different part. Enter your VIN below and we'll call you back with the exact fitment and price. No guessing, no returns.
We'll look up your T680 VIN and call you with the exact part number and price. Usually within a few hours during business hours.
Enter your VIN and phone number — we'll call you back with the exact CAC for your T680.
The Kenworth T680 has been built since 2012 and comes with multiple engine options. The charge air cooler core size, end tank design, and coupler positions differ between engine families. Ordering by year alone isn't enough — the same model year T680 can have either a PACCAR MX-13 or MX-11, each with a different CAC.
Most common T680 engine. Larger CAC core to handle higher boost pressures. Specific fitment by production date.
Smaller displacement, lighter CAC. Not interchangeable with MX-13 units despite similar external appearance.
Found in earlier T680 models (2012–2016 primarily). Uses a different CAC specification than PACCAR engines.
A cracked or leaking charge air cooler reduces boost pressure reaching the engine. These are the most common symptoms on a T680:
Engine feels sluggish on grades or when loaded. Boost pressure is leaking before it reaches the intake manifold.
Insufficient boost causes incomplete combustion. Black smoke under acceleration is a classic boost-leak symptom.
SPN 102 (boost pressure low) or related turbo codes. Your diagnostic tool will point toward the intake side.
Oil in the intake system — usually from a failing turbocharger seal — can contaminate and crack CAC end tanks.
Hot compressed air entering the engine raises combustion temperatures. A failing CAC reduces cooling efficiency.
The engine compensates for lost boost by burning more fuel. A noticeable MPG drop with no other explanation often traces back to a boost leak.
Give us your VIN and phone number — we'll find the exact part and call you with a price.