* Year and Model: Different Blazer years have different engines, and some engines are more complex and expensive to work on than others. A newer Blazer with a more modern engine will likely be more expensive to repair than an older one.
* Engine Type: V6 or V8 engines will have different parts costs and labor time. Larger engines generally mean higher costs.
* Extent of Damage: A simple head gasket replacement might only require replacing the gasket itself. However, significant overheating from the blown gasket could have caused damage to the cylinder head, engine block, or other components, leading to much higher repair costs. Warped heads require machining or replacement, adding substantially to the bill.
* Labor Rates: Labor rates vary significantly by geographic location and the type of shop (independent mechanic vs. dealership). Dealership rates are typically much higher.
* Parts Sourcing: Using OEM (Original Equipment Manufacturer) parts will be more expensive than using aftermarket parts.
Rough Estimate: You could realistically expect to pay anywhere from $800 to $3000 or more. The lower end of that range would be for a simpler repair on an older Blazer with less extensive damage, and a competent mechanic. The higher end and beyond would cover situations requiring extensive engine work, specialized tools, head machining, or using OEM parts.
Recommendation: Get at least three quotes from reputable mechanics or repair shops in your area. Be sure to describe the symptoms fully so they can accurately assess the needed repairs. Don't just ask for a quote on a "blown head gasket" – describe what's happening with your Blazer (overheating, white smoke, etc.). This will allow them to give you a more accurate estimate.
