MitsuStyle - View Single Post - Re-torquing ARP headstuds

**scheides** · 05-16-2009

Ok, I ripped off the valve cover after work and then went to dinner/movie/etc with anna, her sister, and mother-in-law. The car was 100% cold when I got home, so I hit the ARPs with the torque wrench. First, 70lb-ft to see if any were loose. One nut seemed to move a smidge, perhaps half a smidge. Next, 80. That nut, and perhaps 2 others moved a teensy smidge. Next, 88. two nuts moved probably almost 1/10th of a turn and one turned a bit more, closer to 2/10ths. Doesn't seem like much, but when the two center ones are freaking rock solid at all torque specs, any others budging at all is notable IMHO. Sat and contemplated upping it to 90 or 92, but just couldn't bring myself to do it. If one of these studs breaks, the car could be down for several weeks or a month.

I've been hitting it w/o the alky on pretty good this week with little issue, saw coolant once. I'll flip the switch on tomorrow and see how much it dumps out, then back to straight 92/93 octane and low boost.

05-16-2009	#66
scheides flips McGee Cribbage Square Champion! Great Mahjong: Classic Champion! Mah Jongg Solitaire Champion! Mahjong Connect Champion! MuMu Champion! Join Date: May 2004 Location: Minneapolis, MN Drives: BeaterX Posts: 12,900	Re: Re-torquing ARP headstuds Ok, I ripped off the valve cover after work and then went to dinner/movie/etc with anna, her sister, and mother-in-law. The car was 100% cold when I got home, so I hit the ARPs with the torque wrench. First, 70lb-ft to see if any were loose. One nut seemed to move a smidge, perhaps half a smidge. Next, 80. That nut, and perhaps 2 others moved a teensy smidge. Next, 88. two nuts moved probably almost 1/10th of a turn and one turned a bit more, closer to 2/10ths. Doesn't seem like much, but when the two center ones are freaking rock solid at all torque specs, any others budging at all is notable IMHO. Sat and contemplated upping it to 90 or 92, but just couldn't bring myself to do it. If one of these studs breaks, the car could be down for several weeks or a month. I've been hitting it w/o the alky on pretty good this week with little issue, saw coolant once. I'll flip the switch on tomorrow and see how much it dumps out, then back to straight 92/93 octane and low boost.