I'm going to replace my driveshaft today. I see it is held in place with 6mm allen key bolts. I am not a fan of allen key bolts as they often round out.
I'm just wondering what to do if this happens to me today. I will use PB Blaster before I start.
If you encountered rounded out bolts, how did you get around it (parden the pun)

 

Also...is there a way to turn the driveshaft while the car is on axle stands so I can get to the upper bolts?

 

Vise grips and put it in neutral

 

Thanks brutal...finally got all the bolts out...not 6mm allens but T40 torx.
Have a new problem with a new thread now..grrrr

 

Don't worry about damaging these bolts...you won't round them out...they are Grade 8 or better. HOWEVER, cheap tools could be damaged. General info: These bolts have Torx heads, not Allen heads. Cheers, Andy

 

Thanks C.3823
I was using a "cheap" advance torx bit...in fact I had to buy another bit for the very last bolt...the bit was only a little worn, but I figured worn enough to cause a problem.
Now do I use threadlock or never seize on these bolts?

 

well FYI, an allen fits into and provide better grip in to the bolt head better than a Torx bit. as was explained to me in Jaguar engine tech school on the new 5 litre last year. And thats why Jaguar "specs" allen head tool for the head bolts. (Nissan does too on my workshop manual for their engines too)
Ive used an allen head for years on these without issue and saves many here buying a special tool they use seldom

 

Thanks for the tip brutal