Alternator pulley torque setting?? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ahaghshenas · 12-13-2012, 03:11 AM

Got a full pulley set (crank, water pump, alternator), I know the torque settings for the crack and water pump but cant find the alternators torque recommendations anywhere.

Does anyone have any idea of what it might be or where I can find info on this??

Thanks

Anakin · 07-24-2014, 08:15 PM

Did you ever find out the torque specification for the alternator pulley nut ?

I really need to know this too.

Thanks !

Jmonty · 07-24-2014, 11:46 PM

Wow that was a bump from the past, I will need this when I add my Raceseng S2 pully set that should ship next week

zkv476 · 07-25-2014, 12:14 AM

79.7 lbft according to the SM.

Suggestion in case you haven't already read about it, crack and tighten the bolts for the water pump and alternator with the belt still on and in 6th gear, otherwise it's a pain in the butt.

Anakin · 07-27-2014, 09:03 PM

Thanks for the info from the service manual !

I have 6 of the 11 (?) factory Subaru service manuals & I could not find this info & I looked until my eyes bled !

I emailed these manufacturers of aluminum alternator pullies & got the following responses on nut torque :

Perrin--------------- 55' lbs.

GFB ---------------- 60' lbs.

Beatrush ----------- 51.6' lbs. (70 Nm conversion)

Tomioka ------------ 80' lbs.

Someone stated that the alternator turns clockwise thus the nut is "self-tightening" ?

My gut is telling me to go with the 55' lb. torque setting since it is aluminum not steel as the factory one.

It bothers me that this pulley is not "keyed" in some fashion to the shaft to keep it from spinning.

Is the alternator shaft slightly tapered ?

The Tomioka pulley does not look tapered.

Anyway I have one of these coming : [ame="http://www.amazon.com/OTC-4475-Stinger-Grooved-Pulley/dp/B005J3KZPS/ref=sr_1_1?ie=UTF8&qid=1406506003&sr=8-1&keywords=otc+4475&dpPl=1"]Amazon.com: OTC 4475 Stinger Grooved Pulley Strap Wrench: Automotive[/ame] to hold the pulley for removal & installation; sure hope it works.

12-13-2012, 03:11 AM	#1
ahaghshenas Member Join Date: Jul 2012 Drives: Subaru BRZ Location: UAE Posts: 92 Thanks: 5 Thanked 13 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Alternator pulley torque setting?? Got a full pulley set (crank, water pump, alternator), I know the torque settings for the crack and water pump but cant find the alternators torque recommendations anywhere. Does anyone have any idea of what it might be or where I can find info on this?? Thanks

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07-24-2014, 08:15 PM	#2
Anakin Junior Member Join Date: Dec 2013 Drives: BRZ Location: Earth Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Did you ever find out the torque specification for the alternator pulley nut ? I really need to know this too. Thanks !

07-24-2014, 11:46 PM	#3
Jmonty Realtor/ Principal Broker Join Date: Oct 2013 Drives: JRSC BRZ GBS LTD 2010 LTD Outback Location: Salem Oregon Posts: 899 Thanks: 806 Thanked 218 Times in 178 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	Wow that was a bump from the past, I will need this when I add my Raceseng S2 pully set that should ship next week

07-25-2014, 12:14 AM	#4
zkv476 Senior Member Join Date: May 2014 Drives: 2014 SWP BRZ, MT Location: New Jersey Posts: 240 Thanks: 11 Thanked 140 Times in 90 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	79.7 lbft according to the SM. Suggestion in case you haven't already read about it, crack and tighten the bolts for the water pump and alternator with the belt still on and in 6th gear, otherwise it's a pain in the butt.

07-27-2014, 09:03 PM	#5
Anakin Junior Member Join Date: Dec 2013 Drives: BRZ Location: Earth Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks for the info from the service manual ! I have 6 of the 11 (?) factory Subaru service manuals & I could not find this info & I looked until my eyes bled ! I emailed these manufacturers of aluminum alternator pullies & got the following responses on nut torque : Perrin--------------- 55' lbs. GFB ---------------- 60' lbs. Beatrush ----------- 51.6' lbs. (70 Nm conversion) Tomioka ------------ 80' lbs. Someone stated that the alternator turns clockwise thus the nut is "self-tightening" ? My gut is telling me to go with the 55' lb. torque setting since it is aluminum not steel as the factory one. It bothers me that this pulley is not "keyed" in some fashion to the shaft to keep it from spinning. Is the alternator shaft slightly tapered ? The Tomioka pulley does not look tapered. Anyway I have one of these coming : [ame="http://www.amazon.com/OTC-4475-Stinger-Grooved-Pulley/dp/B005J3KZPS/ref=sr_1_1?ie=UTF8&qid=1406506003&sr=8-1&keywords=otc+4475&dpPl=1"]Amazon.com: OTC 4475 Stinger Grooved Pulley Strap Wrench: Automotive[/ame] to hold the pulley for removal & installation; sure hope it works.

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