07' MC Base torque specs?
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Joined: Oct 2017
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07' MC Base torque specs?
Wrapping up a timing chain job on a Mini Cooper non S base hatchback (DOHC). Does anyone happen to know the torquespecs for the intake/exhaust cam bolts, and the crank bolt?
Huge thanks in advance!
Huge thanks in advance!
6th Gear
Joined: Mar 2011
Posts: 1,945
Likes: 203
From: Northern NV
As I mentioned in your 1st thread --- get the Bentley manual! There's a very specific sequence of steps to follow, and if done wrong, your timing will not be correct. Worst case, find a couple youtube videos and learn from them.
But, to answer your question about torque specs, from Bentley ---
Crankshaft hub - Stage 1 is 50Nm (36.8ft-lb) Stage 2 is additional 100 degrees
Intake Vanos - Stage 1 is 20Nm (14.7ft-lb) Stage 2 is additional 180 degrees
Exhaust sprocket - Stage 1 is 20Nm (14.7ft-lb) Stage 2 is additional 90 degrees
These are the three TTY bolts, and are the most critical. Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. I've also read where the top chain guide bolts are easily broken, be careful with them.
But, to answer your question about torque specs, from Bentley ---
Crankshaft hub - Stage 1 is 50Nm (36.8ft-lb) Stage 2 is additional 100 degrees
Intake Vanos - Stage 1 is 20Nm (14.7ft-lb) Stage 2 is additional 180 degrees
Exhaust sprocket - Stage 1 is 20Nm (14.7ft-lb) Stage 2 is additional 90 degrees
These are the three TTY bolts, and are the most critical. Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. I've also read where the top chain guide bolts are easily broken, be careful with them.
3rd Gear
Joined: Jan 2011
Posts: 237
Likes: 10
From: Potomac Maryland
[QUOTE=
Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. [B]I've also read where the top chain guide bolts are easily broken, be careful with them.[/[/B]QUOTE]
Hello - I am doing my timing chain on my 2007 R56 S... and all is going very well except....
the top slide rail guide held on by 2 8MM bolts.... I see where they are supposed to be torqued to twenty NM.... I cannot believe that... I am not comfortable torqueing those bolts to that level... I fear I will either strip the aluminum thread or break the bolt!!
Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. [B]I've also read where the top chain guide bolts are easily broken, be careful with them.[/[/B]QUOTE]
Hello - I am doing my timing chain on my 2007 R56 S... and all is going very well except....
the top slide rail guide held on by 2 8MM bolts.... I see where they are supposed to be torqued to twenty NM.... I cannot believe that... I am not comfortable torqueing those bolts to that level... I fear I will either strip the aluminum thread or break the bolt!!
6th Gear
Joined: Mar 2011
Posts: 1,945
Likes: 203
From: Northern NV
[QUOTE=dmyer;4350143]
I agree, 20Nm seems excessive. I double-checked my old TIS procedure and it also specs 20Nm for these 8mm bolts. There's another 8mm bolt referenced in the TIS torque sheet that gets 24Nm, so maybe it's a legitimate spec. I can't remember whether or not I used 20Nm when I put mine back together --- I may have just tightened them "appropriately" for that size bolt.
Originally Posted by
Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. [B
Other bolts and components also have torque specs that should be used, specifically the chain tensioner tool. [B
I've also read where the top chain guide bolts are easily broken, be careful with them.[/[/B]QUOTE]
Hello - I am doing my timing chain on my 2007 R56 S... and all is going very well except....
the top slide rail guide held on by 2 8MM bolts.... I see where they are supposed to be torqued to twenty NM.... I cannot believe that... I am not comfortable torqueing those bolts to that level... I fear I will either strip the aluminum thread or break the bolt!!
Hello - I am doing my timing chain on my 2007 R56 S... and all is going very well except....
the top slide rail guide held on by 2 8MM bolts.... I see where they are supposed to be torqued to twenty NM.... I cannot believe that... I am not comfortable torqueing those bolts to that level... I fear I will either strip the aluminum thread or break the bolt!!
6th Gear
Joined: Mar 2011
Posts: 1,945
Likes: 203
From: Northern NV
Real OEM confirms it's a couple 6mm bolts. So much for Bentley and the TIS's! Guess that's why there's been a few complaints about these bolts being "fragile". Best of luck with the rest of your assembly procedure.
