Cooling System
Explore expert guides, upgrade insights, maintenance tips, product comparisons, and installation knowledge across a wide range of automotive performance and replacement parts.
5.9 Cummins Intercooler Upgrade Guide: Fitment, Towing, Boost Leaks, and Cost
A practical 2003–2007 5.9 Cummins intercooler guide covering boost-leak diagnosis, towing heat soak, core choices, fitment checks, installation risks, and realistic repair costs.
Does Your High-Mileage Diesel Truck Need a Cooling System Refresh Before Towing Season?
Not automatically. A high-mileage diesel truck needs a cooling-system refresh before towing season only when inspection finds multiple aging or leaking parts, questionable coolant condition, or a repeatable cooling problem...
Bar and Plate vs Tube and Fin Intercooler: Which Is Better for Your Truck?
Bar-and-plate and tube-and-fin are two different charge-air-cooler core constructions, not automatic performance grades. Bar-and-plate is usually heavier and more rigid, with more thermal mass; tube-and-fin is usually lighter and can...
P0299 Code: What It Means and How to Find Your Boost Leak (Start Here)
P0299 means the ECM logged actual boost running below commanded boost. It does not name a part. A hissing cold-side boot, a cracked Y-bridge, a stuck wastegate actuator, and a...
Duramax Y-Bridge & Cold Side: Why It Cracks, Leaks, and Blows Off (LB7 to L5P Guide)
A Duramax Y-bridge is the intake junction that feeds cooled, pressurized air toward both cylinder-head intake runners; on EGR-equipped layouts, the same intake path also receives recirculated exhaust near the...
6.0 Powerstroke Intercooler & Pipe Upgrade Guide
A 6.0 Powerstroke needs an intercooler or pipe upgrade only after the charge-air system has been tested: replace leaking pipes, boots, or clamps when the core holds pressure, replace the...
6.7 Powerstroke Intercooler Pipe Upgrade Guide
A 6.7 Powerstroke needs an intercooler pipe upgrade when a pressure test finds a leak, a plastic connection cracks, a boot loses its grip, or a pipe repeatedly comes loose...
Hot-Side vs. Cold-Side Intercooler Pipes: Which Should You Replace First?
Should You Replace the Hot-Side Pipe, Cold-Side Pipe, or Both? The hot-side intercooler pipe carries compressed air from the turbo outlet to the intercooler inlet, while the cold-side pipe carries...
Why Is There Oil in My Intercooler Pipe?
A light oil film inside a diesel intercooler pipe can be normal because a closed crankcase ventilation system carries some oil mist back into the turbo inlet. Oil showing up...
Oil in Duramax Intercooler Pipes: Normal or a Boost Leak?
Does Oil on a Duramax Cold-Side Pipe Mean a Boost Leak? Oil on the outside of a Duramax cold-side intercooler connection is a leak clue, not automatic proof that the...
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