Estimating the cost to replace the thermostat on a 6.7 Cummins engine involves parts, labor, and potential add-ons. The main drivers are the thermostat price, cooling system access, and whether any ancillary components need service. Cost considerations include both the total project price and the per-unit figures where applicable.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Thermostat | $15 | $40 | $75 | OEM or aftermarket; higher for high-temp variants |
| Labor | $120 | $180 | $260 | 1–2.5 hours typical |
| Coolant & Fluids | $10 | $25 | $60 | Includes disposal |
| Seals/ gaskets | $5 | $15 | $40 | Thermostat housing or neck gasket may be replaced |
| Misc/Shop Fees | $5 | $25 | $40 | Tax, shop supply charge |
Assumptions: region, engine specifics, labor hours.
Overview Of Costs
The typical project range for a 6.7 Cummins thermostat replacement is $150-$500. This reflects low-cost parts with straightforward labor to more complete service including coolant bleed and minor cooling-system checks. The per-unit pricing includes a thermostat at roughly $15-$75 and labor at about $120-$260, depending on shop rates and access.
Cost Breakdown
The following table summarizes cost components for a standard replacement, with assumptions that the vehicle is accessible and no significant cooling-system issues exist. data-formula=”labor_hours × hourly_rate”>
| Category | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $15 | $40 | $75 | Thermostat + seals + coolant |
| Labor | $120 | $180 | $260 | 1–2.5 hours @ standard shop rate |
| Coolant/Fluids | $10 | $25 | $60 | OEM or universal coolant |
| Fees | $5 | $25 | $40 | Tax, disposal, shop charge |
| Warranty/Overhead | $0 | $15 | $25 | Maintenance margin |
Factors That Affect Price
Pricing varies by regional labor rates, access to the thermostat housing, and the need for ancillary cooling-system work. Access difficulty can raise labor time, especially on older units or in tight engine bays. Replacement parts choice also shifts cost; OEM thermostats tend to be pricier than aftermarket equivalents.
Ways To Save
Shop around for labor quotes and consider if a shop offers coolant flush as part of the service, which can reduce dispatch fees. Some owners can perform limited steps themselves (drain coolant, unclip wiring) to lower labor time, though component reassembly should be professional to ensure proper bleed and leak prevention.
Regional Price Differences
Prices for a 6.7 Cummins thermostat replacement vary by region. In the Midwest and South, a typical job may be on the lower end of the range due to lower hourly rates. On the West Coast and Northeast, expect higher labor charges. Regional deltas of roughly ±15-25% are common when comparing urban versus suburban markets.
Labor & Installation Time
Most replacements take 1–2 hours of labor, but tight engine bays or additional cooling-system checks can extend to 3 hours. data-formula=”hours × rate”> For a shop charging $100-$180 per hour, this translates to roughly $100-$540 total labor depending on access and region.
Real-World Pricing Examples
Three scenario snapshots illustrate typical outcomes with different parts lists and work scopes. Use these as benchmarks rather than guarantees.
-
Basic: OEM thermostat, standard coolant, no extra parts.
- Labor: 1.5 hours at $120/hr → $180
- Parts: $70
- Extras/Fees: $20
- Total: $270
-
Mid-Range: Aftermarket thermostat, coolant flush, gasket kit.
- Labor: 2 hours at $150/hr → $300
- Parts: $50 (thermostat) + $25 (gasket) + $25 (coolant) → $100
- Fees: $25
- Total: $425
-
Premium: OEM thermostat, premium seals, full cooling-system check.
- Labor: 2.5 hours at $180/hr → $450
- Parts: $75
- Fees: $40
- Total: $565
Assumptions: region, specs, labor hours.
Additional & Hidden Costs
Watch for hidden items such as hydraulic fan clutch checks, radiator cap replacement, or hose wear that sometimes coincides with thermostat service. Surprise fees may include coolant disposal disposal and mandatory shop supplies. If the cooling system shows leaks or radiator issues, the project can approach the upper end of the range.
Cost Compared To Alternatives
Compared to a full cooling-system service, thermostat replacement is a focused repair with modest overall cost. If the vehicle already requires coolant replacement or a leak repair, combine services to optimize labor efficiency and potentially reduce total cost per task. Alternative options include simple thermostat replacement at a shop visit or a DIY approach for experienced enthusiasts, though DIY carries risk if bleed and pressure checks are not performed correctly.
FAQ
Common questions include whether a thermostat failure always triggers overheating and how long a typical job should take. The short answer: symptoms often include engine running hotter than normal, fluctuating temperature gauge, or coolant loss. For accurate budgeting, obtain a written estimate that itemizes parts, labor, and any potential add-ons. Pricing estimates vary by region and shop.
