Really?
375 Nm of torque can do this? The socket itself was unaffected, no visible deformation at least. These are Crafstman tools, not bargain bin stuff.
What's my next step?
Thanks for any suggestions.

 

I think you're going to need a bigger tool. Is that 3/8" drive ?

 

You can try a 24mm deep socket instead of an extension if a standard 1/2" drive will not reach?

 

Thanks for the replies. I posted too early out of frustration. The drive was 1/2". The reason I used the extension of course was to get the breaker bar handle at 90 deg to the socket so as not to increase the torque reqd. Well, the angle was not that great, and without the extension and a long pipe on the bar I was able to get it loose! If not, I certainly would have gone and bought either larger drive socket (deeper if needed) and a larger drive breaker bar, based on your comments. Tools for this job (cam chains and tensioners) are running up the total cost, though.
It's great to know youare out there and willing to help in such short order!
Very much appreciatied.

 

Nick, have not looked up your location, but I have some of the tools required here. I'll look up what they are, I know cam gear lock and and the one that holes the chain drive gear. I would have to look them out if you are interested.
To borrow of course.

 

I use impact sockets and extensions when removing or installing the crank bolt. The standard crome sockets and extensions are not strong enough to handle that much torque. IMHO.

 

Thank you Wayne, but I have already purchased the tool kits I need for this job. Appreciate your willingness to help.
For reference, Oxford is on I85 not too far from the Virginia/NC line.

 

Thanks Nick, looked it up, not bad but just far enough to make it a trip.
Might keep it in mind if I can help.