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Garage and vehicle workshop · GV-40
Engine Rebuild Measurement Sheet
A free printable engine rebuild measurement sheet: bores, pistons, ring gaps, journals, bearing clearances, end float and deck height against your own spec.
Download Free · no sign-up
2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Keep every measurement from an engine rebuild on one sheet, against the spec you built to. The figures are the proof the engine was built right, and the starting point if it ever comes apart again.
Who it is for
Engine builders, machine shops, restorers and home mechanics rebuilding a car, motorcycle or marine engine.
How to use it
- Write the engine, the parts and where the specification came from at the top.
- Copy each specification into its Spec row before you start measuring.
- Measure each bore at three depths in both directions and work out taper and out of round.
- Fill in ring gaps, rod side clearance, deck height and valve-to-piston on page two, then the journals and bearings.
- Record end float and the torque figures used, and sign it off.
What is on the sheet
2 pages, in this order:
Page 1
Printed under the title: Every measurement taken during an engine rebuild, against the specification you are building to: bores and pistons here, then ring gaps, deck height, journals, bearing clearances, end float and torque figures on page two.
Your specification, written in once. No sizes, clearances or torque figures are printed. Write the specification in each Spec row, and where it came from: the engine maker's manual, the parts maker's data or your machinist. Use the same instruments and the same units throughout, and note anything measured with the parts warm.
Write-on lines: Engine (make and code) · Block no. · Head no. · Units · Specification from · Machinist · Built by · Date · Pistons: make and part no. · Rings · Main and rod bearings
Bores and pistons — across = at right angles to the crank; along = in line with it
Also printed: Top · Middle · Bottom · Cyl · Across · Along · Taper · Out of round · Piston · Clearance · top − bottom · across − along · diameter · piston to wall · Spec
Write-on lines: Bored or honed to · Block decked · Line bored · Other machining
Page 2
Rings, rods and valves — one line per cylinder
Also printed: Ring gaps · Valve to piston · Cyl · Top · Second · Oil rail · Rod side · Deck height · Inlet · Exhaust · Notes · clearance · Spec
Crank journals and bearing clearances — bearing bore measured with the caps torqued, as your spec says
Also printed: Main · Journal · Bearing bore · Clearance · Spec · Rod
Write-on lines: Crank end float: spec · Measured · Clearances measured with · Torque used: mains · Rods · Head · Figures from · Measured by · Checked by · Date
Questions
Why is no specification printed?
Every engine has its own sizes and clearances, and a performance build may use different ones from the maker's. Write the specification you are building to, and where it came from, so anyone reading the sheet later knows what it was judged against.
Can I use this for an engine with more than eight cylinders?
The tables have eight lines per cylinder and journal, which covers most engines. For more, use a second copy for the remaining cylinders and note it on both.
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