# 91 305 engine ?

**URL:** <https://forums.speedlife.net/t/91-305-engine/189411>\
**Category:** PittSpeed Automotive\
**Created:** [April 20, 2007, 2:45pm UTC](https://forums.speedlife.net/t/91-305-engine/189411 "2007-04-20T14:45:13Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![neonracer01](https://avatars.discourse-cdn.com/v4/letter/n/9fc348/32.png) [@neonracer01](https://forums.speedlife.net/u/neonracer01)\
**Post date:** [April 20, 2007, 3:54pm UTC](https://forums.speedlife.net/t/91-305-engine/189411/15 "2007-04-20T15:54:40Z")

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> [@How would you go about diagnosing this problem...](https://forums.speedlife.net/t/how-would-you-go-about-diagnosing-this-problem/29575/23):
>
> Serpentine drive requires reverse rotation water pump. Standard belt drive requires forward rotation water pump. It all depends on the drive system. Serpentine belt loops back around the top of the pump requiring a reverse rotation pump.

can i just eliminate the serpetine system and put my old belts on? will the water pump and alternater from the older style bolt on in place of the serpentine?

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