Basic In-frame Overhaul Kit for International Harvester 1206 and 21206 Series 6-Cylinder Diesel Trac

Description

When your 1206 or 21206 starts burning oil, blowing blue smoke, or losing compression after thousands of hours of pulling plows and discs, it’s time for an in-frame rebuild. This is a basic in-frame kit, which means you’ll be working with the engine still in the tractor. You’ll need to pull the head and oil pan, but the block stays put. This Tru-Power kit gets your turbocharged six-cylinder back to pulling strong without the expense and downtime of a complete engine teardown.

What You’re Getting

• Complete sleeve and seal set designed specifically for the 361 cubic inch turbocharged diesel
• Precision-fit cupped-head pistons with rings that handle the heat and compression these engines produce
• Wrist pins and retainers built to stand up to the power these tractors put out
• Valve-grind gasket set plus oil pan gasket to seal everything up tight
• This is a basic kit, so you’ll need to source your main and rod bearings separately if yours need replacing.

Built for Real Farm Work

The 1206 and 21206 series were International’s workhorses through the late 60s and early 70s, handling everything from heavy tillage to grain harvesting. These 361 cubic inch turbocharged diesels were built for farmers who needed reliable power for big implements and long days. Whether you’re still running yours for custom work or keeping a family tractor going, this kit brings back that original performance.

Made to Last

Tru-Power builds their overhaul kits to meet or exceed original specifications because they know these engines work hard for a living. The pistons are built to handle the compression ratios these diesels need, while the gaskets use materials that won’t fail from heat cycling between cold morning starts and hot summer shutdowns. Quality bearings and bushings ensure everything moves smoothly under load.

Installation Notes

Since this is an in-frame kit, you’ll save the time and cost of pulling the engine. If your crankshaft bearings are worn, you’ll want to order those separately. This is a complete teardown job that requires machine shop work for cleaning and inspection. You’ll want to check cylinder bore condition, crankshaft journals, and head flatness before reassembly.