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Is torquing the valve cover crucial?

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Old May 14, 2018, 06:14 PM
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Is torquing the valve cover crucial?

hi guys so I recently did a lot of work to my evo 9 made 376 whp on the dyno runs great very powerful however Iím just starting to worry about something stupid right now, I didnít torqu the bolts for my valve cover and Iím not having any issues with leaks or anything, but Iím just being paranoid about it and was just curious to know if I could have any future issues from not torquing them down, thanks
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Old May 14, 2018, 06:28 PM
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Chances are, you over tightened it. So it shouldn't leak if you didn't snap the bolts.
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Old May 14, 2018, 06:29 PM
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There is likely a lot of variable that the cover will take, but heres the manual:

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Old May 14, 2018, 06:43 PM
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The torque on them is only like 30-35 INCH-lb's. So, it's more likely they're overtorqued. So just leave it..
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Old May 14, 2018, 06:50 PM
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Originally Posted by letsgetthisdone View Post
The torque on them is only like 30-35 INCH-lb's. So, it's more likely they're overtorqued. So just leave it..
LOL Sean. Was going to stress INCH pounds but hoped he understood. Some young chap could throw 35 ft lbs to it
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Old May 14, 2018, 06:56 PM
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Originally Posted by MinusPrevious View Post
LOL Sean. Was going to stress INCH pounds but hoped he understood. Some young chap could throw 35 ft lbs to it
No way to torque that much. Bolts will break at maybe 15-20 ft-lbs.
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Old May 14, 2018, 06:59 PM
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Originally Posted by 2006EvoIXer View Post
Chances are, you over tightened it. So it shouldn't leak if you didn't snap the bolts.
yea Iím sure thatís a risk you run, I knew the torque spec which is like 31 inch pounds , which is almost finger right, so I just snugged them up , I just heard of people cracking theyíre valve covers from overtightening which made me get second thoughts haha, donít even know how thatís possible , I feel like the bolts would snap before you crack the metal cover
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Old May 14, 2018, 07:11 PM
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Originally Posted by evoix234 View Post

yea Iím sure thatís a risk you run, I knew the torque spec which is like 31 inch pounds , which is almost finger right, so I just snugged them up , I just heard of people cracking theyíre valve covers from overtightening which made me get second thoughts haha, donít even know how thatís possible , I feel like the bolts would snap before you crack the metal cover
On the ones who cracked their valve cover, were they using oem bolts or aftermarket STM allan bolts?
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Old May 14, 2018, 07:18 PM
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Oh I’m not sure man, just came across a thread that mentioned they overtightenes the jolts and cracked the valve cover and that’s what had me grow paranoid about not torquing them lol
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Old May 14, 2018, 09:59 PM
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If you're worried, loosen and torque it down properly.
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Old May 14, 2018, 11:18 PM
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Originally Posted by evoix234 View Post

yea Iím sure thatís a risk you run, I knew the torque spec which is like 31 inch pounds , which is almost finger right, so I just snugged them up , I just heard of people cracking theyíre valve covers from overtightening which made me get second thoughts haha, donít even know how thatís possible , I feel like the bolts would snap before you crack the metal cover
The cover is magnesium, lightweight but fragile and also expensive.
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