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[@tatexpressinc](/creator/tiktok/tatexpressinc)
"Fuel pressure low DD15/ no start DD15/ noise DD15 Full video https://youtu.be/nqjGLEHdhDE #dieselmechanic #semitruck #diesel"  
[TikTok Link](https://www.tiktok.com/@tatexpressinc/video/7220946575856651562) [@tatexpressinc](/creator/tiktok/tatexpressinc) 2023-04-12T00:00Z 12.9K followers, 57.6K engagements


"Paccar MX13 Common Issues"  
[TikTok Link](https://www.tiktok.com/@tatexpressinc/video/7430481786574064942) [@tatexpressinc](/creator/tiktok/tatexpressinc) 2024-10-27T15:44Z 12.9K followers, 95.6K engagements


"🧪🚛 Combustion Test Performed MX-13 Engine Diagnostic 🚛🧪 In this video our specialist tech performed a combustion leak test on a PACCAR MX-13 engine after the customer reported a coolant loss with no visible leaks. To locate the source several tests were carried out: ✅ Pressurized cooling-system test no visible external leaks detected. ✅ EGR cooler inspection found completely dry. ✅ Air compressor check no signs of coolant contamination. ✅ Combustion gas test no combustion gases were detected in the coolant. After eliminating every other possible source the results pointed to a failed"  
[TikTok Link](https://www.tiktok.com/@tatexpressinc/video/7560829936081046798) [@tatexpressinc](/creator/tiktok/tatexpressinc) 2025-10-13T22:02Z 12.9K followers, 2178 engagements


"🧰⚙ Valve Adjustment After Rocker Box Reseal DD15 Engine ⚙🧰 In this video our specialist tech is performing a valve adjustment on this DD15 engine after completing a rocker box reseal. During inspection several intake and exhaust valves were found tight which can affect performance fuel efficiency and long-term engine reliability. 💡 Why valve adjustment matters (especially after resealing): When the rocker box is resealed its the perfect opportunity to inspect and adjust valve clearance. Over time valves can tighten from heat expansion wear and vibration preventing them from seating"  
[TikTok Link](https://www.tiktok.com/@tatexpressinc/video/7561887026321083662) [@tatexpressinc](/creator/tiktok/tatexpressinc) 2025-10-16T18:23Z 12.9K followers, 6069 engagements