Don's Garage Automotive and Transmission
Service · Denver

Engine Repair, Rebuild & Replacement

Diagnostic-first. We'll tell you whether it needs fixing or replacing.

Call (303) 295-2448

What this service is

Engine work covers everything from a misfire that's been haunting you for two months to a full rebuild on a truck you're not ready to give up on. We diagnose first — too many shops quote a rebuild before they've actually identified the problem. If it's a sensor, you don't need a $4,000 job.

What's involved

  1. Full scan of OBD-II codes plus a manual diagnostic read
  2. Compression and leakdown test if symptoms point to internal wear
  3. Honest call: repair, rebuild, or replace — with the math behind it
  4. Sourcing parts from your preferred supplier or our trusted partners
  5. Test drive and re-scan before you pick it up

Wondering if this repair is worth it? Use our free repair-or-replace calculator for a math-based answer in under a minute.

Common signs you need it

If you're seeing any of these, bring it in.

Check engine light that won't go away after a code clear

Misfire under load — climbing a hill, merging onto I-25

Knocking, rattling, or new sounds you didn't have last week

Oil consumption that wasn't there before

White, blue, or black smoke from the exhaust

Loss of power that doesn't feel like a transmission issue

What customers say

Reviews coming soon — check our Google profile in the meantime.

Bring it in. We'll tell you straight.

Real diagnostics, honest call between fix and replace, no sold work that doesn't need doing.

Call (303) 295-2448