Guys I'm trying to get my car buttoned up here and I see varying torque values for the cam bearing caps. I've found threads in the XK8 / XKR forums as well.

In one PDF I see 10Nm which is about 88-89 inch pounds.

Found another thread that is 9-14Nm depending on new or used bolts.

Can anyone tell me for certain what the torque values are?

Thanks in advance.

 

Is it not in the workshop manual? Or one of the engine training courses? All are free downloads.

 

That's pretty important I would follow the shop manual (JTIS) and not anything you find on the forum.

Do you have a copy? It's a free download.
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I eventually found this link:

https://www.mediafire.com/?9s3rsevh3qpra

If that's the right path to take on my journey, I'll start doing more reading

 

I found this after quite a bit of searching, and I'll post it here in case anyone else down the road is trying to search for this exact information.

Extracted from this link:

http://www.jagrepair.com/images/Auto...sb_09_2003.pdf

 

10Nm is pretty standard for 6mm bolts. Have worked on motorcycles for many years and the spec for every Mfr I've worked with has been 9 to 12 Nm. Have run across far too many overtorqued bolts which if lucky only stretch the neck, if not they break off in the head. A good quality inch pound torque wrench is a good investment if you're doing this job.

 

These are 8mm, not sure how much a difference that makes. I read one thread where a guy wrenched them down as tight as he could...not sure how none snapped!

Wouldn't be asking torque measurements if I never had a inch pound wrench

Cheers!

 

Almost always people over-tighten. (Something to avoid.)

I think it's just "to make sure" but it's a mistake (potentially a very serious one).

There must be hundreds of bolts in my car. They haven't needed tightening "just to make sure" and it's 13 yrs old. This isn't chance - it's proper engineering.