BDFHYK Coolant Reservoir Expansion Tank with Cap for Kenworth T600 2008-2015, T660 T800 W900 2008-2017, for Peterbilt 348 365 367 377 382 384 385 386 388 389, Replaces 603-5403 N5346001 T1673008

BDFHYK

BDFHYK Coolant Reservoir Expansion Tank with Cap for Kenworth T600 2008-2015, T660 T800 W900 2008-2017, for Peterbilt 348 365 367 377 382 384 385 386 388 389, Replaces 603-5403 N5346001 T1673008

Name: BDFHYK Coolant Reservoir Expansion Tank with Cap for Kenworth T600 2008-2015, T660 T800 W900 2008-2017, for Peterbilt 348 365 367 377 382 384 385 386 388 389, Replaces 603-5403 N5346001 T1673008
Brand: BDFHYK
SKU: B0BPM6GKHJ
Price: 97.99 USD
Availability: InStock

✅ In stock

Grade

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0/100

Current Price

$97.99

Listed $96.81

Analysis Confidence 55%

⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.

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Price verified Sep 18, 2026 1:22 PM · Prices & availability subject to change

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Product Details

✓FITMENT FOR KENWORTH TRUCKS:For Kenworth T600 2008-2015; T660 2008-2017; T800 2008-2017; W900 2008-2017. Across the listed models, compatible engine applications range from 8.8L to 15.8L, including select diesel and 15.0L CNG configurations. Engine availability varies by model and year. Verify the exact truck model, year, engine, original reservoir and cooling-module configuration before ordering.

✓FITMENT FOR PETERBILT TRUCKS:For Peterbilt 348 2010-2018; 365 and 367 2008-2018; 377 2008-2014; 382 2008-2017; 384 and 386 2008-2016; 385 2008-2014; 388 2008-2015; 389 2008-2017. Compatible applications include select 6.7L to 15.0L diesel engines and select CNG configurations. Verify the exact model, year, engine, fuel type and original reservoir before ordering.

✓PRESSURIZED 9 L CONFIGURATION:The included cap has a listed maximum pressure rating of 105 ±15 kPa. The 9 L capacity is measured at the MAX fill level rather than the brim, preserving the intended coolant expansion space. PP construction is specified for temperatures from -30°C to 120°C. Configured with a coolant-level sensor interface; a separate sensor is not listed as included.

✓REPLACEMENT REFERENCES:Cross-references 603-5403, N5346001 and T1673008. Compare the reference number together with the original tank shape, mounting points, cap neck, hose connections and sensor connector. Similar Kenworth and Peterbilt trucks may use different reservoirs based on engine and cooling-module configuration.

✓BUILT AROUND REAL REPLACEMENT NEEDS:Cracks, seam or hose-neck seepage, dried coolant residue, repeated coolant top-offs or a low-coolant warning may indicate deterioration of the original reservoir or its connections. BDFHYK treats the reservoir as part of a pressurized heavy-duty cooling system: cap rating, sealing surfaces, hoses, clamps, sensor seating, correct filling and proper bleeding all affect operation. Continued coolant loss or elevated engine temperature requires complete cooling-system diagnosis.