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quick torque spec question

 
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Old 28 Aug 2013, 04:10 pm
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Default quick torque spec question

Hey everyone:

I'm in the process of (re)doing my timing belt (belt is off a tooth), and I wanted to know if anyone knows the correct torque spec for the two 15mm bolts that connect the upper torque strut to the bracket on the engine?

The listed spec is 87 lb-ft, which seems correct for the 19mm bolt, but too high for the 15mm bolts. When I did the job the first time, I actually snapped one of the bolts, and only by the grace of God it stayed in one piece and came out.

Pic:



Thanks everyone.

Patrick
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Old 28 Aug 2013, 06:47 pm
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Default Re: quick torque spec question

That's too high. I'd do it by feel, never torque on those
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Old 28 Aug 2013, 07:15 pm
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Default Re: quick torque spec question

Quote:
Originally Posted by Peeeteee View Post
Hey everyone:

I'm in the process of (re)doing my timing belt (belt is off a tooth), and I wanted to know if anyone knows the correct torque spec for the two 15mm bolts that connect the upper torque strut to the bracket on the engine?

The listed spec is 87 lb-ft, which seems correct for the 19mm bolt, but too high for the 15mm bolts. When I did the job the first time, I actually snapped one of the bolts, and only by the grace of God it stayed in one piece and came out.

Pic:



Thanks everyone.

Patrick
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Old 28 Aug 2013, 10:56 pm
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Default Re: quick torque spec question

Maybe so there's no miscommunication, here're the bolts I'm talking about.

Two 15mm and one 18mm (the 19mm above is a mistake)





The Chilton Manual seems pretty clear that the spec is 87 POUND feet. Pic:







So I'm wondering if my manual is wrong or if my torque wrench is broken. Maybe just use "German torque" (good and tight)?

Thanks again everyone.

Patrick
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Old 29 Aug 2013, 01:40 am
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Default Re: quick torque spec question

Peeee; for a 2006 the torques are 85 or 45 foot lbs. There are torque charts for different bolt sizes and grades all over the net. The torques given are based on the diameter of the bolt, NOT on the size of the hex [or socket].

Double check my numbers, as the pictures were a little confusing.
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Old 29 Aug 2013, 11:00 am
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Default Re: quick torque spec question

I tried to post a reply last night, so hopefully it goes through this time.

Just so there is no miscommunication, here are the bolts I'm talking about (actually, the holes where the bolts go.) There are two 15mm bolts and one 18mm bolt. (the 19mm above was a mistake). These bolts hold on the upper torque strut.





The Chilton manual seems very clear that the spec for these bolts is 87 POUND feet:





So, it seems that either my manual is wrong, my torque wrench is smurfed up, or there's some other problem. One other thing I think is a little weird is that these bolts seem to be aluminum or something similar, and I wonder if that makes a difference. Still the spec is supposed to be 87 lb-ft, which is high, but these are also large bolts.

Maybe just German torque? (good-and-tight)?

pt06- thanks. I know that the bolts are not the size of the socket - i.e., I realize that the bolt shank is not 18mm thick. However, bolts are normally referred to by the size of the wrench used on them, not the diameter of the bolt. i.e. a 9/16" bolt is 3/8" thick. When one refers to the bolt itself, one would say M10, M12, etc.
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