Subject	Correct. Using the matching flange nut to larger OD washer
Posted by	Ashman2k2 on February 20, 2016 at 10:36 PM
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In Reply To	I'm pretty sure that Ash is talking about.... posted by tiale11 on February 20, 2016 at 06:54 AM
Message	the bearing area looks to be at least twice that of the incorrectly sized ARP washer/nut combo which torque values have been based on previously. If you check out the FAQ link I posted above, a lower torque value was suggested for the larger OD ARP washer and matching flange nut.
Follow Ups	PSA RE: Head Washer Size / Head gasket Failure - Greg D. (Specialty-Z) 14:50:42 02/17/16 Re: PSA RE: Head Washer Size / Head gasket Failure - Bad Fish 15:09:15 02/17/16 Re: Re: PSA RE: Head Washer Size / Head gasket Failure - Greg D. (Specialty-Z) 15:38:11 02/17/16 wow (n/m) - LJZTT 15:59:46 02/17/16 2nd. (n/m) - spicyZ 08:41:29 02/18/16 yeesh! that's ugly. (n/m) - Dallas DamonZ 16:07:39 02/17/16 Great find Greg, I would like to add... - Red Hawk (CO) 16:11:49 02/17/16 Yikes! Thanks for the post. Glad I switched to stock - MixManMash 17:05:30 02/17/16 Glad I used Z1's upgraded washers on both my engines. - ForceFedTT (SoCal) 20:27:13 02/17/16 Interesting - Ashman2k2 14:00:25 02/19/16 EP Racing posted this a few years ago (n/m) - toykoz32 21:06:11 02/17/16 Although this makes sense to me, so - ILoveBoost 08:41:34 02/18/16 Thank You for the knowledge sir!!!!! (n/m) - NUTTZ(EPTmotorsports) 10:09:53 02/18/16 Re: Although this makes sense to me, so - Placuch 14:21:47 02/18/16 The washers were stacked. - ILoveBoost 15:11:32 02/18/16 Where do you read the washer are stacked?? (n/m) - itsa300zx 16:10:52 02/18/16 I worked on the car after the first HG let go, - ILoveBoost 16:56:21 02/18/16 Someone would have to do some analysis on the metal. - Red Hawk (CO) 17:21:20 02/18/16 Have dimensions? - BlackholeZ 12:49:44 02/19/16 I do have a spare set of z1 washers, no small arp ones tho - Red Hawk (CO) 15:33:31 02/19/16 What is the OD of the Z1 washers? How much larger than OEM? (n/m) - ZXoltan 15:39:39 02/19/16 We have similar issues on MR2s. - dogpile 13:55:09 02/18/16 Similar issues on Miata as well. (n/m) - ztunerz 23:40:06 02/18/16 Curious if you have any data on the required torque to - Ashman2k2 13:38:20 02/19/16 Why would washer OD affect preload? - ZXoltan 15:38:45 02/19/16 Torque is torque. Washer size just spreads the force - BlackholeZ 23:27:31 02/19/16 I'm pretty sure that Ash is talking about.... - tiale11 06:54:15 02/20/16 Correct. Using the matching flange nut to larger OD washer - Ashman2k2 22:36:48 02/20/16
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