Engine accessory mount for improved stretch belt installation

1. An engine comprising:

an engine structure defining a plurality of cylinders;

a crankshaft rotatably mounted to said engine structure;

a plurality of pistons each disposed in a corresponding one of said plurality of cylinders and drivingly connected to said crankshaft;

a drive pulley drivingly connected to said crankshaft;

an accessory mounted to said engine structure and including a driven pulley connected to said drive pulley by a belt;

said belt having a load direction through an axis of rotation of said drive pulley and said driven pulley;

said accessory including a housing having two slots extending generally parallel to said load direction of said belt and each receiving a fastener therein and having a tensioner bolt located between said two slots and extending generally parallel to said load direction.

2. The engine according to claim 1 , wherein said driven pulley is disposed on a first side of said housing of said accessory and said tensioner bolt is on a second side of said housing of said accessory opposite said first side.

3. The engine according to claim 1 , wherein said accessory is a water pump.

4. The engine according to claim 1 , wherein said accessory is a compressor.

5. The engine according to claim 1 , wherein said accessory is a generator.

6. The engine according to claim 1 , wherein said tensioner bolt is located at a midpoint between said two slots.

7. An engine accessory for mounting to an engine and connected to a drive pulley of the engine by a belt, comprising:

a housing supporting a driven pulley, said housing having two parallel mounting slots extending generally parallel to a load direction of the belt and a tensioner bolt located between said two parallel mounting slots and extending generally parallel to said load direction of the belt.

8. The engine accessory according to claim 7 , wherein said driven pulley is disposed on a first side of said housing and said tensioner bolt is on a second side of said housing opposite said first side.

9. The engine accessory according to claim 7 , wherein said accessory is a vacuum pump.

10. The engine accessory according to claim 7 , wherein said accessory is a compressor.

11. The engine accessory according to claim 7 , wherein said accessory is a generator.

12. The engine accessory according to claim 7 , wherein said tensioner bolt is located at a midpoint between said two mounting slots.

13. A method of tensioning a belt of an engine accessory, comprising:

providing a housing of the engine accessory with two mounting slots;

inserting a pair of fasteners in a respective one of said mounting slots and into a respective threaded opening in an engine structure;

putting a belt over a drive pulley of the engine and a driven pulley of the accessory;

tensioning the belt by sliding the housing so that the mounting slots traverse along the fasteners; and

tightening the pair of fasteners to secure the housing to the engine structure.

14. The method according to claim 13 , wherein said tensioning the belt includes tightening a tensioner bolt that causes the housing to move away from the drive pulley.

15. The method according to claim 13 , wherein said accessory is a vacuum pump.

16. The method according to claim 13 , wherein said accessory is a compressor.

17. The method according to claim 13 , wherein said accessory is a generator.

18. The method according to claim 13 , wherein said tensioner bolt is located at a midpoint between said two mounting slots.