Engine Database ⚡ Symptom Checker 🔧 My Garage 🛒 Shop Tools Go Pro Privacy Policy
The Complete DIY Performance Engine Database

STOP
GOOGLING.
START FIXING.

Real torque specs, step-by-step maintenance, common failures, and mod roadmaps — for 25+ performance engine platforms. Built for the person stuck under a car at 11pm.

Murphy's Law is not a myth here. The bolt will round. The part will be wrong. The store will be closed.
We've tried to give you everything you need before all of that happens.
25+
Engine Platforms
600+
Torque Specs
14
Symptom Diagnoses
Free
Always Free
Browse Engines ↓ ⚡ Symptom Checker My Garage
Diagnostic Tool

SYMPTOM CHECKER

Click what you're hearing, seeing, or smelling. Get the most likely causes ranked by probability, engine-specific callouts, and your first diagnostic steps.

⚠ ImportantThis tool gives you diagnostic starting points based on common failure patterns. It is not a substitute for a real diagnosis. When in doubt: do not drive the car. A $30 sensor is easier to pull than a $3,000 engine.
Your Builds

MY GARAGE

Add your builds, track maintenance, log mods, and get engine-specific alerts. Everything saves to your browser automatically.

Add a Vehicle

⚠ Murphy's ReminderWhatever you budget — double it. Whatever timeline — triple it. Parts will be backordered. A bolt will snap. The forum advice will be wrong for your specific year. That's wrenching. This site is here for all of it.

Your data saves to this browser only. Clearing browser data will remove your garage.

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Add your first build to start tracking maintenance,
log mods, and get engine-specific alerts.

Master Tool List

The WrenchRepublic Shop

Every tool worth owning — researched, ranked, and linked. From a $8 bottle of brake cleaner to a professional scanner. Buy once, buy right.

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⚡ WrenchRepublic Pro

EVERYTHING UNLOCKED.

Full torque specs. Downloadable PDF guides. Wiring diagrams. Build roadmaps. Your personalized garage. And someone to ask when the forum answers are useless and the dealer wants $300 for diagnostics.

Free Forever
$0
always free · no signup needed
  • All 25+ engine overviews
  • Maintenance checklists
  • Common issue descriptions
  • Mod guide overviews
  • Symptom Checker tool
  • My Garage (browser-based)
  • Full torque spec database
  • PDF guides & diagrams
  • Priority Q&A
BEST VALUE
Pro Monthly
$9/mo
cancel anytime · instant access
  • Everything in Free
  • Full torque spec database (600+ specs)
  • 100+ downloadable PDF guides
  • Platform wiring diagrams & pinouts
  • Stage 1–3 build roadmaps
  • Priority tech Q&A (48hr response)
  • New content added weekly
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What You Get

PRO FEATURES

📐

Full Torque Spec DB

Every critical fastener for every platform. Head bolts, rod caps, cam sprockets — with procedure notes and TTY warnings.

📄

PDF Guide Library

100+ downloadable repair guides, torque spec sheets, and printable checklists you can take to the garage without your phone.

⚡

Wiring Diagrams

Platform-specific pinouts, sensor locations, and wiring diagrams for swaps, standalone ECU installs, and troubleshooting.

🗺️

Build Roadmaps

Stage-by-stage plans from stock to built. What to buy first, what order saves money and headaches.

💬

Priority Q&A

Submit a tech question and get a real answer within 48 hours. Not a forum redirect — an actual diagnosis of your problem.

🔄

Weekly Updates

New engines, deeper guides, and expanded torque specs added every week. Pro members get early access.

Common Questions

FAQ

Can I cancel anytime? +
Yes. Cancel from your Gumroad account settings anytime. No fees, no questions. You keep access until the end of your billing period.
Is there a free trial? +
The free tier is genuinely free forever — 25+ engines, maintenance checklists, symptom checker, and My Garage. Try it fully before upgrading.
What payment methods are accepted? +
All major credit cards, PayPal, and Apple Pay via Gumroad's secure checkout. WrenchRepublic never sees your payment details.
Will I get access immediately? +
Yes. The moment your payment processes, you'll receive an email from Gumroad with access. No waiting, no approval process.
What if I have a question about my specific engine? +
Pro members get priority Q&A — submit your question and get a real answer within 48 hours. Not a forum redirect. An actual answer to your actual situation.
Legal

PRIVACY POLICY

Last updated: 2025. This privacy policy describes how WrenchRepublic collects, uses, and protects information when you use our website at wrenchrepublic.com.

Information We Collect

WrenchRepublic is designed to work without collecting personal information. The site operates primarily as a static, read-only resource.

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WrenchRepublic participates in the Amazon Associates program. When you click product links and make a purchase, we earn a small commission at no additional cost to you.

Cookies

We use minimal cookies. Google Analytics uses cookies to track anonymous usage. Amazon may use cookies when you click affiliate links. We do not use advertising cookies or sell any data to third parties.

Your Data

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Third Party Services

Contact

Questions: wrenchrepublic@gmail.com

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