G35 Sedan V36 2007- 08 Discussion about the 2nd Generation G35 Sedan 2007 - 08

Undercover bolt torque?

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Old 07-13-2019, 12:53 PM
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Question Undercover bolt torque?

Hi Everyone,

Does anyone know the correct torque for the bolts that hold the engine undercover in place? I've looked all around and searched through the FSM. Typically it will show the bolt torque on the diagram but as you can see it's not specified.


2007 G35 (V36) undercover

In the past I've just made them snug (I think professional mechanics would call it "half a grunt") and I may be a bit pedantic but, while I'm no he-man body builder I have over tightened nuts and bolts in the past which is why I tend to torque nearly everything these days. Better safe than strip the threads!

Thanks in advance!
Larry.
 
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Old 07-13-2019, 01:52 PM
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I don't think there is a torque but I'd guess something around 40 inch lbs.
 
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Old 07-13-2019, 03:59 PM
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Originally Posted by [email protected] View Post
I don't think there is a torque but I'd guess something around 40 inch lbs.
Hi Cleric670,

Yea, good guess. I just made them "good 'n' snug" but it would be nice to know the actual torque value.

Thanks!
Larry.
 
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Old 07-13-2019, 04:05 PM
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I'm just guessing the 40 in/lbs because a 1/4-20 fastener is about the same size and they are torqued to 48 in/lbs. Subtracted 20% for a fudge factory because I think the threadserts in the chassis are actually the weak point and thus I came up with 40 in/lbs. Haven't tested it on my vehicle yet though. I usually just hit them with an impact driver and feather the trigger and make it hammer for only 2-3 clicks which from my experience is about 1.5 ft/lbs per impact, I wouldn't really recommend that tool however unless it's something you use every day like I do. A safer alternative would be a battery drill with a clutch set on like.... 9 or so. Then they're all "torqued" the same, QUICKLY, without all the time spent with a ratchet.
 
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Old 07-14-2019, 12:46 AM
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Good idea Cleric.

When torquing small fasteners, I usually just check the chart. Big stuff, I follow the factory manual.
 
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Old 07-14-2019, 02:59 PM
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Hah, it's crazy how I literally spend my work days torquing fasteners and I've never seen a metric chart until today. Everything at work is SAE and for anything auto related I check the FSM/Haynes/Chilton/Internet.
 
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Old 07-14-2019, 06:53 PM
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Originally Posted by [email protected]
Hah, it's crazy how I literally spend my work days torquing fasteners and I've never seen a metric chart until today. Everything at work is SAE and for anything auto related I check the FSM/Haynes/Chilton/Internet.
That's why I love the forum format. Glad you learned something !
 
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Old 07-15-2019, 11:09 AM
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One has to love some of these questions even though I grew up with the idea that "No Question is Stupid!" Areas like this undercover unit require only one word, SNUG! And doesn't require a bolt torque setting!
Gary
 
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Old 07-15-2019, 11:41 AM
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I wouldn't imagine the covers needing more than a basic good feeling tighten. but you could always add a dab of blue liquid torque for piece of mind. (just make sure to use blue red is heavy duty)
 
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Old 07-15-2019, 12:23 PM
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Loctite 242 or 243, stay away from 272 unless the application specifically calls for permanent bonding.
 
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