http://cdn.meme.am/instances/500x/54472137.jpg My wife said this is my motto. lol
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^ Haha, so true.
「'89 BMW 325is | '02 Mitsubishi Montero Limited | '2005 GMC Sierra 2500 Duramax | 2007 BMW M5 」
「my feedback thread」
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Originally posted by semaj4712 View Post90% of the time the bolts you need to worry about stretching are the same bolts ARP makes replacements for. ARP is not making oil pan bolts for a reason.
Not to mention:
Bolt stretching according Hook's Law can be expressed as
dl = F L / E A
where
dl = change in length of bolt (inches, mm)
F = applied tensile load (lb, kN)
L = effective length of bolt where tensile strength is applied (inches, mm)
E = Young's Modulus of Elasticity (psi, N/mm2)
A = tensile stress area of bolt (square inches, mm2)
Tensile stress area can be expressed as
A = 0.7854 (d - 0.9743 / n)^2
where
d = nominal diameter of bolt (inches, mm)
n = number of threads per inch (pitch)
So if you figure a bolt being m6x20 at 1 pitch you can figure this out
F = Typical Torque for an oilpan bolt = 10.5 N-m (10500 N-mm)
L = 20mm
E = Based on SAE 5 which I know is not correct but its close and its what I could easily find = 30psi (206842.7 N/mm^2)
d = 5mm
n = 25.4 threads per inch
dl = 10500(20) / 206842.7(.7854(5-.9743/25.4)^2)
dl = 210000 / 206842.7(.7854(5-.0384)^2)
dl = 210000 / 206842.7(.7854(4.961)^2)
dl = 210000 / 206842.7(.7854(24.618))
dl = 210000 / 206842.7(19.335)
dl = 210000 / 3999280.804
Change in Length (Stretch) = .053mm
So literally your talking .053mm of stretch, I am pretty sure thats why they make gaskets
Science b1tches YEAH !!!
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Originally posted by ManSalad View PostComplete shot in the dark but does anyone have a trailer that I can borrow/rent to bring home a shell? I'm located in Spring Valley and I just need to tow the car like 1 mile ,__,
if its only one mile i would just tie that shit up to a pick up and have someone steer and brake as you get pulled.Originally posted by dvckI'm going to say this nicely; go fuck yourself.
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leaving work 30 min early to go to garagistic to pick up my obc led light bar and wire cup holder.
then hopefully my new diff will be ready for pickup from fedex and i can change the fluid and get the obc light in tonight and tomorrow get the new diff in and my new shift boots should arrive tomorrow afternoon.
then taking the ole girl to get a/c next week.
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I keep missing out on this drive !!!! This is my old stomping grounds 25 years ago bro's. I know this road like the back of my hand lol. It use to go up further than where they have it blocked off now. I miss this drive!!! :(:(Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
garage queen 91 bmw 325is / 1972 Chevy El Camino 355 sbc 450hp
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