About Engine Building

What goes into a Katech engine build?

When you buy a Katech engine, you’re getting a level of build detail and precision at the top of industry standards.  As one of the  engine builders is preparing and assembling your engine, every measurement is documented in an engine build book, kept at Katech at all times. We often go to our archives to provide information for customers who have acquired retired race engines from the 1980s. What are you getting for your money when you purchase your next crate engine? Is your engine built by an engine “assembler” or an engine “builder”? Take a look below at the level of detail that goes into a typical engine build at Katech.


• Disassemble, wash and inspect parts

• Crack check using Magnaflux (ferrous metals) or Zyglo (non-ferrous metals) if necessary

• Chase all threads in cylinder case and clean

• Measure main bores, line hone if necessary

• Measure lifter bore clearance

• Measure cylinder bore

• Hone cylinder bores using deck plates

• Measure bore finish with profilometer

• Weigh pistons, connecting rods, rod bearings, pins, locks and rings to determine crankshaft bobweight

• Balance crankshaft

• Polish crankshaft journals

• Tack weld crankshaft trigger wheel

• Hone piston pin bores and connecting rod small end

• Polish piston pins (excl. DLC-coated pins)

• Deburr piston round wire locks

• Measure ring lands for back clearance

• Deburr piston ring ends

• Gap piston rings

• Measure main journals with air gauge

• Measure big end of connecting rods with air gauge, hone if necessary

• Size main bearings with air gauge

• Measure connecting rod bolt stretch

• Size rod bearings with air gauge

• Measure crankshaft endplay

• Measure piston pin endplay

• Measure connecting rod side clearance

• Check piston to deck height

• Deck block if necessary

• CC piston dome volume

• CC cylinder head chamber volume

• Deck heads if necessary

• CC intake port volume

• CC exhaust port volume

• Measure valve guide clearance

• Measure valve spring pressure and coil bind

• Check valve spring retainer to seal clearance

• Polish camshaft

• Measure camshaft specs with EZ Cam

• Degree camshaft

• Measure piston-to-valve clearance

• Measure valve radial clearance

• Measure vertical valve drop

• Measure camshaft endplay

• Measure lifter preload to determine pushrod length

• Calculate compression ratio

• Torque all fasteners to spec

• Document all measurements and torques in engine build book

• Perform engine dynamometer validation

o Break-in using specific schedule

o Check oberg filter for material

o Verify health of engine using up to 75 channels of data

o Verify power and torque

o Document in dyno report


Other capabilities as needed:

• Hot hone (cylinder bore honing at operating temperature)

• Piston ring land flatness measurement to the millionth of an inch

• Hardness testing

• Bore cylindricity measurement using PAT Incometer

• Valvetrain dynamics testing

• Cylinder head flow testing

• Dynamometer durability testing and track simulation

• Engine calibration (MEFI4)