Crankshaft Pulley Bolt May Come Loose on Toyota 4Runner

Submitted by Vehicle Owner · May 29, 2025
Published by RepairPal

Problem overview

Some of the 4 and 6 cylinder engines have had the problem of the crankshaft pulley bolt coming loose. This will make a rattling noise as the engine idles. Our technicians tell us that the pulley bolt should have a thread locker applied and then re-torqued.

5 people reported this problem
1 comment
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Toyota 4Runner vehicles with this problem

Average mileage: 88,500 miles
(81,000 - 96,000)

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