EraVerdict: A 505-hp titanium-rod monster with one big catch: LS7 valve guides. Buy with head work documented or negotiate a reserve.
At a glance
Risk 4/5 Market: Big-ticket risk
Must-have records:
- Head rework invoice (guides/valves)
- Valve-guide wiggle test results
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Buy-risk rundown
| Issue | Symptom | How to check | Typical cost (as of Nov 2026) |
|---|---|---|---|
| LS7 valve guide wear | Valvetrain noise; worst case a dropped valve | Valve-guide wiggle test; ask for head records | Head rework ~$1,945–$2,978 (you supply heads) + ~$2,195 remove/reinstall; one drive-in/out package $3,350 (2019) [1] |
Cost figures checked against the sources below in Nov 2026. Bracketed numbers refer to the source list.
Notes
- GM addressed guide wear/noise in a TSB [3].
Before you buy
Use our printable pre-purchase inspection checklist and get a PPI from a marque specialist.
Sources
- Dino's Corvette Salvage, LS7 valve guide guide (accessed Nov 2026)
- CorvSport, C6 buyer's guide (accessed Nov 2026)
- GM TSB: Valve Guide Wear / Noise (NHTSA PDF) (accessed Nov 2026)
Last updated 2026-11-05. Costs vary by region and shop.
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