What's mildly irritating you today?

[glatt]

It's beyond irritating me now. I replaced the engine mount. All proud of myself that it only took 20 minutes. I was tightening up the last bolt, using the torque wrench to do it perfectly. And the damn bolt snapped. It felt pretty tight to me, but the wrench hadn't clicked yet, so I kept tightening. Then there was a big click as the MF snapped on me.

Either the torque wrench is calibrated wrong or I'm using it wrong. But it worked perfectly on the first bolt.

So I've been to two car parts stores and one hardware store and can't find a bolt that fits. I'm pretty sure it's a non-standard M9 1.25 pitch bolt. So I finally gave in and went to the dealership to order a new bolt. It will be here Tuesday.

Four hours into this damn project so far, and the car is now disabled until the new bolt gets here.

Lesson learned: screw the torque wrench. Just follow my gut and tighten with a regular wrench.

[xoxoxoBruce]

Either the torque wrench is calibrated wrong or I'm using it wrong. But it worked perfectly on the first bolt.

Nope, can't make that assumption.
Some bolts, as designated by the manufacturer of the car, are not to be reused, the service manual should tell you which.
That bolt could have been over-torqued by the factory on anywhere along the way, causing it to be sub standard.
The bolt has been around a long time, nobody know the trouble it's see.
A burr or foreign material can cause binding which would require more force to overcome than the bolt is rated for.
Most nuts and bolts are oily enough to prevent galling, even though they look shiny clean. It can gall in a fraction of a revolution, and when it does you're generally screwed, not being able to move the bolt in either directing without breaking it.

Did you get the snapped bolt out?