Dog bone inserts.

[Greenouse]

Anyone know where I can get a strengthened bolt as I already have the insert? 

I thank you 

[bacillus]

Anyone know where I can get a strengthened bolt as I already have the insert? 

I thank you 

Just get a new bolt from your VW dealer. It will cost a little over a pound.

[Greenouse]

Anyone know where I can get a strengthened bolt as I already have the insert? 

I thank you 

Just get a new bolt from your VW dealer. It will cost a little over a pound.

I confuse  If it's a dealer part whats wrong with the one already on the car?

[gazbutmk5gti]

Think its a stretch bolt, so when you torque it down it stretches slightly, giving a sort of preload to it. If you then tighten it again the bolt has already been stretched once so the preload won't be the same. Some if not most cylinder head bolts are like this, also we use them on planes for important applications

[candy turbo]

if its a stretch bolt once its been removed from its original tightness the bolt requires replacing !!

[gazbutmk5gti]

could do with confirming if it is or not, but I'm pretty sure I read it somewhere

[Greenouse]

Thanks chaps   got ya now!  

Anyone know the 'official' name for it or will ''the stretch bolt from the dog mount insert'' do it?  

[gazbutmk5gti]

Thanks chaps   got ya now!  

Anyone know the 'official' name for it or will ''the stretch bolt from the dog mount insert'' do it?  

I fitted the ECS dogbone insert today, and looking at the bolt I don't think its a stretch bolt, looks like a standard big bolt

There are markings on the head which I think relate to the strength of the bolt. The standard 1 was 8.8, the 1 that came with the ECS insert was 10. something. These aren't the size of the bolt as I measured them and the numbers didn't tie up.

[bacillus]

Thanks chaps   got ya now!  

Anyone know the 'official' name for it or will ''the stretch bolt from the dog mount insert'' do it?  

It's a 21mm hex bolt with VW part number N105 580 01   

[bacillus]

There are markings on the head which I think relate to the strength of the bolt. The standard 1 was 8.8, the 1 that came with the ECS insert was 10. something. These aren't the size of the bolt as I measured them and the numbers didn't tie up.

The numbers refer to the physical hardness of the bolt. 10 is the hardest.