I was driving my parent's Oldsmobile, which had 140,000 miles on it. In response to some friends joking and revving their engines, I held my foot on the brake and revved my engine. The car rocked violently, and the upper radiator hose failed. I pulled into a parking lot. The hose had apparently failed when the V-belt rubbed a hole into it, yet the V-belt was more than three inches away from the hose.
I scratched my head, and then I reproduced the power-braking with the hood open and saw that the torque radically lifted the big V8 up out of its already-failed engine mount. I was lucky it didn't smash things up trying to flip itself over in the engine compartment.
I walked to a nearby auto parts store, where I bought a new hose and two replacement engine mounts. If one had failed, both were probably due for replacement. I drove the car home to replace the mounts.
When I jacked the engine up, I noticed that the third mount on the transmission had also failed and was gaping apart. The engine had been sitting in the car without any attachments, except hoses and the throttle linkage. I replaced both engine mounts, as well as the transmission mount.
When I examined these failed surfaces, I could see they had been rubbing against each other for a long time.
This entry was submitted by David T. Humphrey and edited by Rob Spiegel.
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