Description
When your engine starts making that telltale knock or you notice excessive oil consumption, worn piston pin bushings could be the culprit. These small but critical components keep your pistons aligned and operating smoothly inside the cylinders. A failing bushing lets the piston pin wobble, creating noise, reducing power, and eventually leading to expensive internal damage you definitely don’t want to deal with during busy season.
What You’re Getting
- Precision-machined bushing that restores proper piston pin clearance and alignment
- Durable construction designed to handle the heat and pressure inside diesel engines
- Direct replacement that fits right where the old bushing came out
- Quality materials that’ll stand up to the demanding conditions these engines face
Built for Heavy-Duty Diesel Work
This bushing is engineered specifically for CDC-B series non-emission diesel engines—the 3.9L 4-cylinder variants (4-390, 4T-390, 4TA-390) and their 6-cylinder counterparts (6-590, 6T-590, 6TA-590). These are workhorse engines found in construction equipment, generators, and industrial applications where reliability matters more than anything else.
Made to Handle the Heat
Piston pin bushings live in one of the hottest, most demanding environments in your engine. This replacement is made from materials that resist wear and maintain proper clearances even under extreme operating conditions. The precision bore ensures your piston pin has the support it needs without binding or excessive play.
Installation Notes
Piston pin bushing replacement requires pulling the pistons, so it’s typically part of a larger engine rebuild project. You’ll need 4 bushings for the 4-cylinder engines and 6 for the 6-cylinder versions. While you’re in there, it’s smart to check piston pin wear and replace any that show scoring or excessive wear—a worn pin will chew up a new bushing quickly.
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