GarageCalcs: The Grease-Stained Gearhead for the Weekend Wrencher
Meet the Calcs Family →

Engine rebuild cost planner

Add up machine work, parts and labor for your rebuild with a cushion for surprises. Fill in your own quotes. Every line is optional.

Enter your numbers
Machine shop
Parts
Labor and cushion
0 if you're doing it yourself.
Extra for the parts and machine work you find you need.

Estimated total

–
–
Machine work
–
Parts
–
Labor
–
Contingency
–

Tear down before you budget

A machine shop can't quote accurately until the block, crank and heads are cleaned and measured. Cracks or out-of-spec parts found then are what the contingency is for.

Planning a rebuild budget

Rebuild costs vary widely by engine, region and how far you go, so this planner uses your own numbers rather than guessing. Get written quotes from your machine shop for each operation, and price parts as a complete kit or piece by piece.

Why a contingency

Almost every rebuild turns up something unexpected once the engine is apart: a cracked head, a crank that needs more than a polish, or parts that turn out to be the wrong size. A 10 to 20% cushion keeps a surprise from stalling the project. The link button saves your whole estimate so you can come back to it or send it to someone.

Frequently asked questions

Why does the calculator include a cushion for surprises instead of just totaling my quotes?

Rebuilds routinely turn up problems that weren't visible until the engine was apart — a cracked casting, an unexpected machining step — and experienced builders commonly budget an extra cushion on top of quoted costs for exactly that reason.

Should I fill in every line even if I'm not sure yet?

No — every line is optional by design, since not every rebuild needs every service (some blocks don't need boring, some builds reuse existing pistons) — leave blank whatever doesn't apply to your specific rebuild.

Does this include the cost of the engine hoist, stand, or other tools?

Not unless you add it yourself — this planner is built around machine work, parts, and labor for the engine itself; one-time tool purchases are a separate cost you can fold in as its own line if you want the full picture.

More Engine calculators

Cam Timing Calculator Compression Ratio Calculator Coolant Mix Calculator

Read the guide

Budgeting an Engine Rebuild: Machine Work, Parts and Surprises

All GarageCalcs tools