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Automotive RepairRepair and Maintenance Decisions3MediumHome Mechanic / DIYer$ implied

Lack of a clear, accessible, step-by-step protocol for replacing a harmonic balancer on a 2004 Ford Focus 2.0 Zetec, especially regarding TDC and crank locking procedures.

Existing guides are vague or conflicting about whether TDC and pulley locking are necessary for a keyed harmonic balancer, and no single authoritative protocol exists for this specific make/model/engine.

Opp. Score

Severity

3Medium

Willingness to Pay

implied

Added

May 8, 2026

Workarounds Described

using a screwdriver through the spark plug hole to find TDC
starter-bumping the bolt loose while hoping crank doesn't move

Implied Software Gaps

A mobile app that provides auto-specific, step-by-step instructions with torque specs and TDC/locking guidance would replace guesswork and conflicting guides

App Concept

BoltTurn Repair Guides

A subscription-based web and mobile app offering curated, vehicle-specific step-by-step repair guides with torque specs, tool lists, and safety notes. It aggregates verified protocols from repair databases and community edits, with video walkthroughs for each step. Users can filter by exact car model, engine, and repair type.

Key Features

Vehicle-specific repair protocols with search by year/make/model/engine
Step-by-step instructions with torque specs and tool requirements
Video walkthroughs for critical steps (e.g., TDC finding, bolt loosening)
Community Q&A with verified mechanics

Target Users: DIY home mechanics and hobbyist car owners working on common consumer vehicles (e.g., Ford Focus) who need reliable, detailed repair instructions.

Revenue Model: $7.99/month subscription or $2.99 per single guide purchase

Existing Solutions Mentioned

online guidesscrewdriver through plug hole for TDC

Part of App Idea

Lack of a clear, accessible, step-by-step protocol for replacing a harmonic balancer on a 2004 Ford Focus 2.0 Zetec, especially regarding TDC and crank locking procedures.

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