Water pump bolts torque to ? Ftlbs

[gtomanohio]

I need new water pump my pulley is pushed into housing and rather change than try to fix... Also thanks to greg(pace performance), came over and got lower hose to work and found power steering pulley bent....so i'll have him order new pulley... But i will need torque specs for water pump and sequence if any thanks john

[LDM]

Service manual just says first pass 11 ft-lbs, second pass 22 ft-lbs. No specified sequence.

[gtomanohio]

Thanks again LDM!!!!!!

[Crazy Paul]

Service manual just says first pass 11 ft-lbs, second pass 22 ft-lbs. No specified sequence.
I see where you got those figures from.
If you go into the Cooling section in 2 different places it says 18 ft-lb for the final pass.

http://www.grrrr8.net/crazypaul/WP.pdf
http://www.grrrr8.net/crazypaul/CoolFast.pdf

[LDM]

I see where you got those figures from.
If you go into the Cooling section in 2 different places it says 18 ft-lb for the final pass.

http://www.grrrr8.net/crazypaul/WP.pdf
http://www.grrrr8.net/crazypaul/CoolFast.pdf

WTF, again? I specifically checked the text AND the Fastener Tightening Specifications this time, and both say 22 ft-lbs, but I was looking in the Engine Mechanical, not the Engine Cooling section of the book.

[LDM]

http://i843.photobucket.com/albums/zz352/lenmartin23/DSC_5295.jpg

http://i843.photobucket.com/albums/zz352/lenmartin23/DSC_5294.jpg

[-Ray-]

I would go with the 18 ft lbs. I had to heli coil the thermostat housing to water pump threads.

[LDM]

18 ft-lbs probably would be the safer bet. There's just no consistency all across GM's line for water pump torque spec. Since I was curious, I checked the service manuals of other LS-powered vehicles (4th gen Camaro:LS1, GTO:LS2, Corvette:LS3, CTS-V:LSA), and some said 22 ft-lbs while others said 18 ft-lbs in one spot and 22 in another, like the G8 manual. I also have two books, "How to Rebuild GM LS-Series Engine" and "How to Build and Modify GM LS-Series Engines" and one says 18 and the other 22. Of course if GM can't get it straight in their official publications, how could you expect "aftermarket" books to get it consistent.

[Greg@PacePerformance]

For parts like this I just go with "snug" :)

[DavesG8GT]

I've done 11/22 multiple times on several cars with never an issue.

[gtomanohio]

cool thanks for the pic's.

[gtomanohio]

Thanks HSV-GTS-300 for the how to ..... Trying to bring back a g8 gt back to life...... almost there... new water pump,and new power steering pulley then hopefully start up...