So I have like 700 miles left to the 2500 mark but it's been two years and the car has been sitting all winter so I feel like I may as well get in there and do it now.

Is there a specific guide just for the retensioning procedure somewhere? Do I have to put the flywheel lock and all that on all over again just to retension? (it's been two years since I replaced the belts so I'm a little bit foggy on the procedure now)

 

Once again, clark's garage has everything needed. I don't know that the lock is absolutely necessary for tensioning, but it makes it easier to avoid any issues.

http://clarks-garage.com/shop-manual/eng-10.htm

 

wow not sure how I missed this... my fault.

 

If your car is an 87+ it's a snap with the spring tensioner. Mine had not been retensioned on my 944S by the PO for 13K. I was amazed the slack in both belts. The tension roller moved a good 1/4" when the locking bolts were loosened. I just do the BS by feel and 180 deg twist; it was also looser than spec. It made the response feel so much better after doing it. Took me about 1.5 hours since the air box sits right on top of the belt covers on an S. The manual tensioners take a bit longer even with the 'magic' P9201 tool which I never use. I've never used a flywheel lock yet on the 6 belt jobs I've done and never had a problem yet just leaving the car in gear and setting the parking brake.

 

No need to lock flywheel on a retension. Some people get the new belt on without pulling the crank pulley/sprocket. Fine if you ditched the belt covers but with them on there is some twisting/forcing involved to get the new belt on the sprocket (clearance issues with rear belt cover). YMMV...