Ford uses shear bolts on some applications. Notably the ignition lock cylinder housings. Always have to remember to bill one out whenever I bill out an Escape lock housing.
One time use bolts .
- Thread starter wpod
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A risk adverse shop will replace it, otherwise everyone else (whether blissful ignorance, arrogance, or just plain IDGAF) are going to slap on the same bolt.
Its like going to an oil change place or DIYing, some folks will replace the crush washer and others will run it with the old one, or even without one.
In fact, some recent destructive testing proves this. A number of single use fasteners retain their original tensile strength and can be re-used with confidence in SOME applications. What tends to happen is that single use bolts stretch more on the second use. For non cyclic loads, where a simple known clamping pressure is required, they can be re-used.
Remember, a bolt under enough tension to stretch it,,, while carrying a cyclic load that is far lower than the tension on the bolt, won't feel the cycles. Therefore, it will hold up just fine.
My Nissan's have a bunch of OTU bolts per the manual - mostly on the suspension. There definitely not TTY. I know the local dealer doesn't replace them because they never had stock on any of them. I even had trouble getting some one time for the U joint bolts from the big Nissan online dealer because what they sent was wrong and they told me that was what the catalog called for. I actually figured it out (they were the same size as the bolts on the other end so I just ordered more) but you would think if all the dealers were following this they would fix the catalog.
I presume the driveline bolts are recommended to replace maybe due to corrosion? No salt on the roads here so maybe that's why there not needed? I usually order them for the job but often don't use them based on how the old one came out - never had an issue and I have a giant box of unused Nissan bolts.
I presume the driveline bolts are recommended to replace maybe due to corrosion? No salt on the roads here so maybe that's why there not needed? I usually order them for the job but often don't use them based on how the old one came out - never had an issue and I have a giant box of unused Nissan bolts.
Some braces under the rear of my Mini have bolts that "didn't feel right" when I attempted to re-installed them. It wasn't a cross-threaded-kind of feel, but, it bothered me. I was swapping out the exhaust system, and simply needed the braces out of the way for a bit. Did some research and found those were OTU. Ordered the correct replacements, and they "felt right" when re-installing. Glad I noticed and didn't just force it.
When we get the bolts apart on the WWII Lancaster we're restoring, we almost always replace them. And feel lucky we got them apart at all. Rust can be a great nut lock.
ls1mike
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Certain ones I will reuse, head bolts, intake bolts no. Torque to yeild, no.
I will reuse brake hardware even though I believe most of those are one time use.
Where I work the Navy has a complete, I believe it is 200-page manual on the use of fasteners.
It is very specific.
I will reuse brake hardware even though I believe most of those are one time use.
Where I work the Navy has a complete, I believe it is 200-page manual on the use of fasteners.
It is very specific.
Yea, my Ranger is covered up in those things, like others have said, in most cases it is because of threadlocker. I clean them up, put some blue on them, and re-use. There's no way some of those are TTY.
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