torque specs 99 4.3L
NINFan
08-12-2007, 02:09 PM
i'm replacing the oil pump and main and rod bearings on my son's '99 4.3 4X4. the whole painful story is here: http://www.automotiveforums.com/vbulletin/showthread.php?t=725265
i decided to go ahead and finish the repairs, but now i can't find the torque specs for the main caps. i went to the autozone repair guide, and they have every torque EXCEPT the mains. i can't find it on the web. closest i've come to is 80 ft lbs for a 93 4.3. i'm guessing it will be the same, but i'd rather be sure before i button things back up.
thanks
i decided to go ahead and finish the repairs, but now i can't find the torque specs for the main caps. i went to the autozone repair guide, and they have every torque EXCEPT the mains. i can't find it on the web. closest i've come to is 80 ft lbs for a 93 4.3. i'm guessing it will be the same, but i'd rather be sure before i button things back up.
thanks
2001jettavr6
08-12-2007, 03:52 PM
its the same engine just newer emissions im sure, unless they made the oil pump put out an exponential amount of more pressure it should be the same 80 ft lbs, but make sure that its foot pounds and not inch pounds, common mistake and to convert to foot pounds from inch pounds divide by 12
maxwedge
08-12-2007, 04:21 PM
Under no circumstances would the mains ever be inch /lbs. Also the amount of oil pressure an engine operates on has no bearing on engine tightening specs, careful with the advice here. It is possible these bolts are torque to yield, try and get the accurate info.
NINFan
08-12-2007, 09:20 PM
Under no circumstances would the mains ever be inch /lbs. Also the amount of oil pressure an engine operates on has no bearing on engine tightening specs, careful with the advice here. It is possible these bolts are torque to yield, try and get the accurate info.
ya, roger. thanks. i ended up driving to autozone after they put me on hold for like 15 mins (twice). guess they don't like answering questions like that on the phone.
anyway, it turns out to be 15 lbs + 70 degrees. seems a silly way to do it to me. i'd think just having a set torque would be more accurate. i only have an inch pound torque wrench that goes to 150 (12.5 ft lbs) and one that goes from 30 to 200 ft lbs (old snap on click type). i guessed at where 15 lbs would be on the inch lb wrench, then tightened to 70 degrees. i know it's not the most accurate, but i didn't have much of a choice. wasn't gonna buy another torque wrench.
ya, roger. thanks. i ended up driving to autozone after they put me on hold for like 15 mins (twice). guess they don't like answering questions like that on the phone.
anyway, it turns out to be 15 lbs + 70 degrees. seems a silly way to do it to me. i'd think just having a set torque would be more accurate. i only have an inch pound torque wrench that goes to 150 (12.5 ft lbs) and one that goes from 30 to 200 ft lbs (old snap on click type). i guessed at where 15 lbs would be on the inch lb wrench, then tightened to 70 degrees. i know it's not the most accurate, but i didn't have much of a choice. wasn't gonna buy another torque wrench.
MT-2500
08-13-2007, 10:16 AM
ya, roger. thanks. i ended up driving to autozone after they put me on hold for like 15 mins (twice). guess they don't like answering questions like that on the phone.
anyway, it turns out to be 15 lbs + 70 degrees. seems a silly way to do it to me. i'd think just having a set torque would be more accurate. i only have an inch pound torque wrench that goes to 150 (12.5 ft lbs) and one that goes from 30 to 200 ft lbs (old snap on click type). i guessed at where 15 lbs would be on the inch lb wrench, then tightened to 70 degrees. i know it's not the most accurate, but i didn't have much of a choice. wasn't gonna buy another torque wrench.
When using toque to yield bolts always use new bolts.
The old bolts are already Stretched out one time and may not stretch very good the second time.
MT
anyway, it turns out to be 15 lbs + 70 degrees. seems a silly way to do it to me. i'd think just having a set torque would be more accurate. i only have an inch pound torque wrench that goes to 150 (12.5 ft lbs) and one that goes from 30 to 200 ft lbs (old snap on click type). i guessed at where 15 lbs would be on the inch lb wrench, then tightened to 70 degrees. i know it's not the most accurate, but i didn't have much of a choice. wasn't gonna buy another torque wrench.
When using toque to yield bolts always use new bolts.
The old bolts are already Stretched out one time and may not stretch very good the second time.
MT
NINFan
08-13-2007, 10:28 AM
When using toque to yield bolts always use new bolts.
The old bolts are already Stretched out one time and may not stretch very good the second time.
MT
you gotta be kiddin me! that would mean new bolts for all the mains, the oil pump, new studs on the rods...
not sure i'm up for all that. the car has 130K on it. thanks for the info, tho
The old bolts are already Stretched out one time and may not stretch very good the second time.
MT
you gotta be kiddin me! that would mean new bolts for all the mains, the oil pump, new studs on the rods...
not sure i'm up for all that. the car has 130K on it. thanks for the info, tho
MT-2500
08-13-2007, 11:33 AM
you gotta be kiddin me! that would mean new bolts for all the mains, the oil pump, new studs on the rods...
not sure i'm up for all that. the car has 130K on it. thanks for the info, tho
Nope not kidding.
I did not say all bolts but.
Any bolt that is a torque to yeild bolt always use new bolt.
MT
not sure i'm up for all that. the car has 130K on it. thanks for the info, tho
Nope not kidding.
I did not say all bolts but.
Any bolt that is a torque to yeild bolt always use new bolt.
MT
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