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Crankshaft thrust bearing repair at Route 66 Auto Repair in Upland addresses a crank that moves too far forward and back in the block. The thrust bearing controls that movement, called end play. When it wears, you may feel the clutch pedal pulse or see crank sensor codes. We measure end play with a dial indicator so the diagnosis rests on a number, not a guess.
What are the signs of thrust bearing wear?
- Clutch pedal that pulses or moves on its own at idle
- A clunk when you press or release the clutch
- Crankshaft position sensor codes with no wiring fault
- Front crank seal leaking again soon after replacement
- Metal debris in the oil filter
What wears out a thrust bearing?
The thrust bearing takes the push when the clutch is pressed. Holding the pedal down at long lights on Foothill Blvd, or a pressure plate with too much clamp load, loads it constantly. On automatics, a torque converter that swells under pressure can push the crank forward. Low oil and dirty oil speed the wear.
Because the cause often sits in the drivetrain, we check the clutch and converter alongside the bearing. Clutch concerns are covered under drivetrain services.
Our thrust bearing repair process
Step 1: Measure end play
A dial indicator on the crank pulley reads movement as the crank is pried forward and back.
Step 2: Compare to spec
The reading is compared with the factory limit and written down.
Step 3: Plan access
The estimate explains whether the pan, the transmission or the engine must come out.
Step 4: Replace and inspect
New thrust bearing, with the crank thrust faces and main bearings inspected.
Step 5: Remeasure and road-test
End play is checked again before final assembly and a road test.
What's included in thrust bearing repair
Included on the work order
- 01Dial indicator end play reading, before and after
- 02Oil filter debris check
- 03New thrust bearing
- 04Crank thrust face inspection
- 05Clutch or converter check for the cause
- 06Road test
Need-now or need-later?
Need now: call
- End play beyond limit with crank sensor codes or noise
- Bearing debris in the oil
Need later: book
- End play near the limit with no symptoms, remeasured at the next service
How pricing and timing work
On some engines the thrust bearing is part of a main bearing shell and can be reached with the pan down. On others, the crankshaft must come out, which puts this in crankshaft repair or engine bearing replacement territory. Worn thrust faces on the crank add steps, and your written estimate shows every one.
Aftercare
On a manual car, shift to neutral and release the clutch at long stops. Keep oil changes on schedule, and call if the pedal pulse returns.
Frequently asked questions
What is crankshaft end play?
It is how far the crankshaft can slide forward and backward in the block. A small amount is normal. Too much means the thrust bearing is worn.
Can a bad thrust bearing ruin the engine?
If ignored, the crank can wear into the block, which is very costly. Caught early, it is a bearing and inspection job.
Does resting my foot on the clutch cause this?
Holding the clutch pedal down for long periods loads the thrust bearing. Shifting to neutral at stops helps it last.