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Volvo D13 Guide: Specs, Service and Buying a Replacement
A practical Volvo D13 guide for owners and mechanics: specs, ratings, service intervals, what to check, and how to match a replacement engine to your truck.
Transmission Interchange: How to Match Heavy-Duty Units
Learn how to confirm a heavy-duty transmission or differential carrier interchange: read the tag, check ratios and controls, and avoid ordering the wrong unit.
Aftertreatment Relearn Procedure: When and How to Run It
What an aftertreatment relearn does, when a heavy-duty diesel needs one, how it differs from regen and code clearing, and how to confirm it worked.
Engine Hours to Miles for Diesel Trucks: How to Convert
Convert diesel engine hours to estimated miles with the 33 mph rule, adjust for idle time and duty cycle, and judge a used engine fairly. Worked examples inside.
Post-Swap Road Test: A Heavy Truck Checklist
How to road test a heavy truck after an engine or transmission swap: pre-start checks, route, gauges, codes, stop signs and what to document.
Mack MP8 Guide: Specs, Systems, Service and D13 Comparison
Mack MP8 guide for owners and mechanics: key specs, how the fuel, EGR and oil systems work, model-year checks before a swap, and how it compares to the Volvo D13.
Cat C15 Guide: Specs, Versions, Problems and Buying Tips
A practical Cat C15 guide for owner-operators and shops: specs, MBN vs ACERT, 3406E comparison, common problems and what to check before you buy.
Engine Core Charge: How It Works and How to Get Refunded
What an engine core charge is, what condition your old engine must be in, how the return works, and how to protect your refund. A plain guide for truckers and fleets.
Cummins ISX Guide: Specs, Years, ISX15 vs X15 and Buying Tips
A plain guide to the Cummins ISX family: specs, ISX12 vs ISX15, ISX15 vs X15, model years to check, lifespan, and what to verify before buying a used engine.