cparagone
Well-known member
Thanks for the list!
If torque specs are so important why does it seem like most service shops do not use a torque wrench?
I watch a mechanic build a 1969 Chevy Camaro & a 1970 Chevelle from the ground up (installed new engines) and not once did he use his torque wrench.
Also any video you watch online on "how to do" they are always using an impact wrench!
Does this mean you cannot trust service shops at all to do the job right?
15 Ft*Lbs - use new crush washers...Is there a torque spec for the turbo oil line banjo bolt on the filter housing? the one with the two copper crush washers.
You can trust them to do the job relatively quickly... some of them will get the torque values correctly, some of them will get them "in the ballpark," and others will be way off the mark... some of those last ones will "get away" with it... others won't... (or else the damage will only become apparent many thousand miles later, where pinning the "blame" will be next to impossible...)Does this mean you cannot trust service shops at all to do the job right?
The 4, M8 bolts for the harmonic balance are supposed to be torqued to 18 ft.lbs although I frequently torque them to 22.I have found that the specified torque for the crankshaft bolts is incorrect. I do not have a Bentley manual, so someone please correct this if it is wrong. I tried torquing the crankshaft bolts to 88 ft lbs and they just stretched and then snapped without ever getting to that number. I then researched and read online someplace that it is 48 ft lbs plus 90 degrees. i used those values and did not have a problem. All this being said, I believe the correct torque for the crankshaft bolts when rebuilding an engine is 48 foot lbs and NOT 88 foot lbs.
-Transmission mount to "bracket that holds transmission" (the 2 big 18mm bolts that hang the tranny from the mount) - 100nm (74ftlbs)
-Dog bone (aka) Rear Transmission Mount (aka) Pendulum Support...
-Rear 2 bolts (to subframe) 20nm + 90deg (15ftlbs + 1/4turn)
-Front 2 (to tranny) 40nm + 90deg (30ftlbs + 1/4turn)
Or, rather, rename them to reflect that the value is for the crankshaft sprocket bolt...Please remove the incorrect entry of 88ft lbs for crankshaft bolts.