lawdogg wrote:Dave, Nathan, anyone with a 90-91, do any of you have a SNC engine? I do, and I'm a little apprehensive about doing the timing belt because of it. I do plan on putting in a new bolt & key (with the loctite fix, torqued to 84.5 ft-lbs) ... just seeing if you guys have ever had any issues with it.
I have the short-nose crank in my '90. I replaced the bolt and key and have not had any issues with it. It's not difficult to do, and definitely a good idea to do it -- just go slow and careful and be sure you're doing everything exactly right. This isn't a place to be cutting corners or winging it.
Make sure you use a brand-new bolt and key, and that the key is put in the right way (putting it in backwards is reportedly a common cause of failures). Put blue Loctite on the bolt, and torque it to exactly 84.5 ft-lbs., and hope that your torque wrench is close to correctly calibrated.
BTW, the "Loctite Fix" is only needed if the keyway in the crankshaft nose is already worn. It's a way of using red Loctite to fill in the big gap in the keyway so that you don't need to replace your crankshaft. If the keyway isn't worn, you don't need to do the Loctite fix. (But you should still use blue Loctite on the bolt threads.)