Crankshaft grinding and flywheel resurfacing in Bowling Green.
A knock, a spun bearing, or a chattering clutch all end at the same bench. Bowling Green Engine Machine measures, grinds, polishes, and balances the rotating parts, and gives every crank an honest verdict before anyone spends rebuild money.
Crank work, in the order it happens
- Measure every journal. Diameter, taper, out-of-round, and straightness, written down. This is where a crank becomes a polish, a grind, or a parts-counter story.
- Polish when it measures standard. $80 to $130 restores the journal finish on a crank whose numbers are still good. The cheapest good news in engine building.
- Grind when it does not. Journals ground true at ten or twenty thousandths under, $250 to $400 for all journals, matched to the undersize bearings in the box.
- Balance when the build calls for it. New pistons, performance intent, or any high-rpm plan: $180 to $320 with the pieces you send.
Flywheels: the ten-minute job that saves a comeback
Every clutch replacement should include the flywheel surface, because a fresh disc against a glazed or hot-spotted flywheel chatters from day one and gets the new clutch blamed. Resurfacing runs $60 to $100, stepped flywheels are machined to their step spec, and shops around Russellville and Glasgow send the flywheel with every clutch job as standard practice.
The shut-it-down rule
When a knock starts, the difference between a $300 grind and a $2,000 crank hunt is how fast the engine stops turning. Shut it down, tow it or pull the crank, and let the measuring bench tell the story. We give crank verdicts the same week, and a verdict costs nothing but the look.
Get a crank or flywheel priced
Engine, symptoms, and how fast it was shut down. Photos of the journals to (270) 438-4749 speed the verdict.
Crank and flywheel questions
Can a crankshaft with a spun bearing be saved?
Usually, if the engine was shut down quickly. Most spun-bearing cranks clean up ground ten or twenty thousandths under and run a full life on the correct undersize bearings. Grinding all journals runs $250 to $400. A crank that got hot enough to turn colors gets checked for hardness and straightness before any promise is made.
How much does crankshaft grinding cost?
All journals ground runs $250 to $400 at our Bowling Green shop, depending on journal count and undersize. A crank that measures standard and only needs its finish restored gets a polish at $80 to $130 instead. The verdict comes off the measuring bench, usually the same week the crank arrives.
Does my flywheel really need resurfacing with a new clutch?
Yes, and skipping it is the most common cause of a chattering new clutch. A glazed or hot-spotted flywheel keeps a fresh disc from bedding evenly. Resurfacing runs $60 to $100, stepped flywheels get machined to their spec rather than skimmed flat, and the job is often same-week.
What is rotating assembly balancing and when is it worth it?
Balancing matches the weight of pistons and rods and corrects the crank so the assembly spins without shaking itself. It is required work when mixing new pistons with an existing crank in a performance build, and cheap insurance on any engine that will live above 5,000 rpm. $180 to $320 depending on pieces sent.
Cranks usually travel with a block and a head. Bowling Green Engine Machine covers the block work and head work too, with every price on the published menu and the whole shop at the homepage.