Overview
The Crown Automotive 6503198K is a drive belt tensioner bolt and collar for serpentine belt systems, used with 2.5L 4-cylinder and 4.0L 6-cylinder engines. The part number is 6503198K.
The bolt and collar hold the belt tensioner at its mounting point, so the correct fit and clean collar seating matter for steady belt tension. No vehicle make, model or model year is given.
Key features
- Bolt and collar for a drive belt tensioner
- Serpentine belt application
- Engine application: 2.5L 4 cylinder or 4.0L 6 cylinder
- Part number 6503198K
Tensioner bolts and collars
A tensioner bolt and collar set the pivot point the tensioner arm swings on, so the collar must seat flat and the bolt must draw down to the correct torque. Uneven seating or a bolt that has stretched can allow the arm to wander, leading to belt slip or noise. Clean the mounting face and collar bore before fitting a new bolt.
Use the fastener grade and length that suits the original application, and avoid reusing a bolt that shows thread damage or necking. Some tensioners are replaced as a set with the arm and pulley, so check the whole assembly for play before torquing. After the first drives, recheck the bolt and the belt tension, since new fasteners can settle slightly.
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 6503198K (from the product title) |
| UPC | 849603000587 |
| Component | Drive belt tensioner bolt and collar |
| Belt system | Serpentine |
| Engine | 2.5L 4 cylinder or 4.0L 6 cylinder |
Vehicle fitment
The application is the 2.5L 4 cylinder or 4.0L 6 cylinder engine. Check your engine and tensioner design before ordering.
Engine size only narrows the field; it does not identify a model year. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check the bolt threads and collar for wear before reuse, because the bolt carries the tensioner’s load. Disconnect the battery before loosening belt components.
What’s included
The bolt and collar only. A tensioner pulley and serpentine belt are not included, so check whether those need replacing too.
