The 'E' Type Forum

Is there a conveniently compiled list of manufacturer recommended torque settings for bolts throughout the car?

I'm in the process of reassembling everything in front of the firewall and I have found it difficult or impossible to sift out correct torque settings from my various manuals.

Please can I re-ignite this post as I have the same query relating to front suspension component assembly.

Have a look here: http://etypeuk.com/forum/viewtopic.php?t=700

Hi David,

I too struggled with this recently.

Are these really the best links we have ?

http://dl.dropbox.com/u/8496016/Torque%20settings.doc

This gives a Word document, complete with a table and graphs.

If you know the bolt size, the grade of steel it's made from, can decide whether it's adequately lubricated, know the designed clamping force you're after, and you can spot where the units to set on your torque wrench are hidden in the columns, then this is absolutely the table for you.

Not sure I can manage that in practice.

http://dl.dropbox.com/u/8496016/Torque% ... 281%29.mht

produces the same document, whilst asking me to accept a Google toolbar and trying to replace Firefox with Explorer.

Am I looking in The Wrong Place ?

The tables are quite useful but you need to exercise caution because I think there are some mistakes in the units used. Thus 1/4 inch bolts grade 5 are given as taking 120 lbs/ft torque. I suspect whoever compiled it confused lbs/inches with lbs/ft because for a 1/4 UNF bolt of standard grade I would expect no more than 10-15 lbs/ft to be used.

The majority of bolts on Jaguars are UNF, or UNC where they go into alloy . 1/4 UNF takes a 7/16 AF spanner ; 5/16 is 1/2 AF ; 3/8 is 9/16 AF ; 7/16 is 5/8 AF . If you take the following as dry settings you will not go far wrong , and take 20 to 25 % less if for any reason you are lubricating the threads ,

7/16 AF 12 - 15 lbs.ft
1/2 AF 17-20
9/16 AF 30- 35
5/8 Af 55

The large sizes, eg for axles, crank pulley etc usually have the very high torque required defined in the manual , and they usually are running in the region of 140 lbs.ft dry

I hope this helps