Wednesday, November 22, 2023

Ranger Biodiesel Swap - Exhaust System

 The original exhaust system was unusable, so I needed to fabricate a new one from scratch. For simplicity and low-budget, it's made from AutoZone slip-fitting exhaust sections, welded together at most of the seams, and attached to the original VW collector.

I left one joint unwelded in the center of the pipe, so that I can experiment with different muffler and catalytic converters at a later date. For now, it will simply be a 1.75" unmuffled straight pipe.

VW Exhaust Collector

Down Pipe


Mocking up the system

Welding the exhaust seams.

The original engine in this truck was a V6, which used a pair of O2 sensors (one per bank). Rather than weld an extra sensor bung to the downpipe, I spliced a single sensor to provide electrical outputs to the pair of connectors.




After assembly and paint, I attached the rear of the exhaust to a hanger with a rubber isolator. I left this portion adjustable, to facilitate future exhaust upgrades.














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