What people keep running into with mechanical failure
Complaints tagged mechanical failure, each raised by more than one person. One-off posts are not included.
7 recurring problems · 76 people · 6 forums we read
Raised more than once
Most people first.
- 50Vehicle cranks after fuel pump replacement but won't startA replacement fuel pump can deliver pressure while flooding the engine with excess gas, preventing it from catching. This leaves the vehicle cranking normally but refusing to start or run.
- 11Why am I paying for broken bolts during a car repair?Repair shops and dealerships often break rusted or seized parts during standard service, yet charge vehicle owners to extract or replace them. This leaves customers footing the bill for damage that wasn't there when they dropped off the car, while shops refuse to absorb the labor required to handle stubborn factory components.
- 5How to remove a snapped bolt in a tight space?Standard drills and extractors require more depth than the restricted three-inch clearance available around deeply snapped bolts. This lack of room prevents you from getting a drill bit far enough into the recess to extract the broken fastener.
- 4Did my timing belt slip or did I mess up the install?An engine that idles fine briefly before running rough, dying, or refusing to rev past 2,000 rpm points directly to valve timing misalignment from the recent replacement rather than a slipped belt. This prevents the car from running reliably despite new components, as incorrect timing creates unburned fuel issues, strong petrol smells, and misfires.
- 2Manual transmission still making noise after fluid top offTopping off the transmission fluid can quiet most gears, but a specific gear like 6th can continue to wear down and grow noisier if internal components are already damaged. This persistent wear leads to total gear failure, effectively turning a multi-speed transmission into a lower-speed unit.
- 2How to remove a snapped valve adjustment screwA valve adjustment screw can snap off right under the nut with only slight pressure. The remaining bolt often backs out a few threads before stopping completely and refusing to budge, even when twisted with vice grip pliers.
- 2Why does a newly replaced driveshaft keep failing?A freshly installed driveshaft or U-joint can quickly shake loose or fall apart again during highway driving, leaving the vehicle trapped on the road. This sudden failure stops the car from accelerating smoothly and causes a violent screeching or grinding noise whenever power is applied.
Comes up alongside
Topics that keep appearing on the same problems — not topics with similar names.