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upper intake torque specs please

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Old Dec 31, 2009 | 02:22 PM
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upper intake torque specs please
took the upper intake manifold off of my 88 5.8L with efi just need the torque specs for the 6 upper intake bolts, thanks
 
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Old Dec 31, 2009 | 02:48 PM
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i think its like 89 inch pounds
 
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Old Dec 31, 2009 | 03:15 PM
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Its 12-14 ft/lbs , upper to lower intake ...Lew
 
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Old Dec 31, 2009 | 03:36 PM
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are sure 12-14 ft/lbs where u getting ur info from?
 
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Old Dec 31, 2009 | 04:11 PM
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Thats factory torque specs for the 5.0 ...Where did you get your info...Lew
 
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Old Dec 31, 2009 | 04:27 PM
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idk the only info i can find for the plentum torque specs is 89 inch pounds.....
and that was for the 5.4l

5.0,5.0 HO and 5.8 lower intake is 23-25 ft pounds.... but what u said does sound right....

i always tightened to what i felt was good....
 
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Old Dec 31, 2009 | 04:45 PM
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The 23-25 ft/lbs for the lower is good , i don't ever torque the upper , just nice & tight , thats about 12-18 ft /lbs, After working on motors for years you just get the feel for it , heads , lower intake ect i use the torque wrench ...
 
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Old Jan 1, 2010 | 06:03 PM
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Industry std. torque for 5/16" grade 8 hardware is 18 #/ft. (but I'm always scared to pull that on the T30 bolt with a 1/4" drive socket).
 
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Old May 24, 2021 | 02:25 AM
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Cast is 23-30 ib and aluminum 18; however the 4 corners keep at 15
[QUOTE=Duramaxfanatic1;8301793]took the upper intake manifold off of my 88 5.8L with efi just need the torque specs for the 6 upper intake b

Aluminun 18 ft obd and cast 23-30 ft of the four corner bolt leave at 15 ft lbs
 
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Old May 24, 2021 | 11:40 AM
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I used the German torque spec "gudentight" on mine and just torqued them in a normal torque sequence from the middle out.
 
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Old May 24, 2021 | 12:53 PM
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on a 88 302 what is the size of the hidden torques bolt on the upper intake?
 
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Old Nov 15, 2024 | 05:52 PM
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Originally Posted by dremtofford
on a 88 302 what is the size of the hidden torques bolt on the upper intake?
That would be a t-40 star bit.
​
 
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Old Nov 16, 2024 | 02:54 PM
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Originally Posted by Raizer
That would be a t-40 star bit.
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epic first post. welcome to the site.
 
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Old Nov 17, 2024 | 12:08 PM
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Originally Posted by '89F2urd
epic first post. welcome to the site.
thank you. thank you.
 
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Old Nov 17, 2024 | 03:09 PM
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the upper intake is just air and vacuum it doesn't have to be gorilla tight just snug.
 
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