Here's where you can try to find the belt routing diagram:
1. Chevrolet Service Manual (1985): This is your best bet. A service manual for a 1985 Chevrolet truck or vehicle with a 454 engine will have a detailed diagram showing the correct belt routing. You can find these manuals online (eBay, Amazon) or through specialized automotive parts retailers. Look for manuals specific to the year and engine. The year is crucial because routing might change slightly between model years.
2. Online Forums and Communities: Search online forums dedicated to Chevy trucks, classic cars, or Winnebago motorhomes. Search terms like "1985 454 Chevy belt diagram," "Winnebago belt routing," or "454 belt routing diagram" might yield results from people who have worked on similar setups.
3. Local Auto Parts Store: A knowledgeable parts person at an auto parts store (like AutoZone, NAPA, or Advance Auto Parts) might have access to diagrams or be able to look up the routing based on your engine and year. Bring your VIN if possible for better results.
4. Haynes or Chilton Repair Manual: These manuals often include diagrams, though they might be less detailed than a factory service manual.
Why Belts Keep Breaking: Before you just replace the belts, investigate *why* they are breaking. This is crucial to avoid ongoing problems. Consider these possibilities:
* Misaligned pulleys: Even a slight misalignment can cause excessive belt wear and breakage.
* Worn pulleys: Grooved or damaged pulley surfaces will quickly shred belts.
* Incorrect belt tension: Too tight or too loose will cause premature failure. A tensioner pulley is usually involved in setting the correct tension.
* Belt quality: Using cheap belts will lead to frequent failures. Use good quality belts from a reputable brand.
* Accessory issues: A seized alternator or power steering pump will put extra strain on the belt.
* Incorrect belt routing: If the belt is routed incorrectly, it might rub against something, causing it to wear down and break.
Troubleshooting Steps:
1. Careful Inspection: Visually inspect all pulleys for damage, grooves, or excessive wear.
2. Check for Obstructions: Ensure nothing is rubbing against the belts.
3. Tension Check: If you have a tension gauge, check the belt tension. If not, try to manually deflect the belt and see if the deflection is within the manufacturer's specifications (usually found in a service manual or online).
4. Listen for Noises: Listen for any squeaking, squealing, or grinding noises from the belt or pulleys – this indicates a problem.
Addressing the underlying cause is key to solving your belt breaking problem. Just replacing belts without fixing the root issue will lead to ongoing frustration.
