BLOCK TYPE
H22A = closed deck
H22A1 = closed deck
H22A4 = open deck
H23A = open deck
H23A1 = closed deck
F20A = open deck
F20B = open deck
F22A = open deck
F22B = open deck
F22B1 = open deck
F22B2 = open deck
F23A = open deck

DECK HEIGHT
H22A = 219.5mm/8.643
H22A1 = 219.5mm/8.643
H22A4 = 219.5mm/8.643
H23A = 219.5mm/8.643
H23A1 = 219.5mm/8.643
F20A = 219.5mm/8.643
F20B = 219.5mm/8.643
F22A = 219.5mm/8.643
F22B = 219.5mm/8.643
F22B1 = 219.5mm/8.643
F22B2 = 219.5mm/8.643
F23A = 219.5mm/8.643

BORE
H22A block = 87mm/3.425
H22A1 block = 87mm/3.425
H22A4 Block = 87mm/3.425
H23A block = 87mm/3.425
H23A1 block = 87mm/3.425
F20A block = 85mm/3.346
F20B block = 85mm/3.346
F22A block = 85mm/3.346
F22B block = 85mm/3.346
F22B1 block = 85mm/3.346
F22B2 block = 85mm/3.346
F23A block = 86mm/3.385

Rods

LENGTH
H22A = 143.0mm/5.633
H22A1 = 143.0mm/5.633
H22A4 = 143.0mm/5.633
H23A = 141.5mm/5.572
H23A1 = 141.5mm/5.572
F20A = 145.0mm/5.709
F20B = 145.0mm/5.709
F22A = 141.5mm/5.572
F22B = 141.5mm/5.572
F22B1 = 141.5mm/5.572
F22B2 = 141.5mm/5.572
F23A = 141.0mm/5.551

WIDTH
H22A = 23.75mm/.935
H22A1 = 23.75mm/.935
H22A4 = 23.75mm/.935
H23A = 23.75mm/.935
H23A1 = 23.75mm/.935
F20A = 23.75mm/.935
F20B = 23.75mm/.935
F22A = 23.75mm/.935
F22B = 23.75mm/.935
F22B1 = 23.75mm/.935
F22B2 = 23.75mm/.935
F23A = 19.81mm/.780

MAIN BORE
H22A = 51.00mm/2.008
H22A1 = 51.00mm/2.008
H22A4 = 51.00mm/2.008
H23A = 51.00mm/2.008
H23A1 = 51.00mm/2.008
F20A = ???
F20B = 48.00mm/1.890
F22A = 51.00mm/2.008
F22B = 51.00mm/2.008
F22B1 = 51.00mm/2.008
F22B2 = 51.00mm/2.008
F23A = 48.00mm/1.890

PIN BORE
H22A = 21.97-21.98mm/.8649-.8654
H22A1 = 21.97-21.98mm/.8649-.8654
H22A4 = 21.97-21.98mm/.8649-.8654
H23A = 21.97-21.98mm/.8649-.8654
H23A1 = 21.97-21.98mm/.8649-.8654
F20A = 21.97-21.98mm/.8649-.8654
F20B = 21.97-21.98mm/.8649-.8654
F22A = 21.97-21.98mm/.8649-.8654
F22B = 21.97-21.98mm/.8649-.8654
F22B1 = 21.97-21.98mm/.8649-.8654
F22B2 = 21.97-21.98mm/.8649-.8654
F23A = 21.97-21.98mm/.8649-.8654

Pistons

BORE
H22A = 87mm/3.425
H22A1 = 87mm/3.425
H22A4 = 87mm/3.425
H23A = 87mm/3.425
H23A1 = 87mm/3.425
F20A = 85mm/3.346
F20B = 85mm/3.346
F22A = 85mm/3.346
F22B = 85mm/3.346
F22B1 = 85mm/3.346
F22B2 = 85mm/3.346
F23A = 86mm/3.385

COMPRESSION HEIGHT
H22A = 31.0mm/1.221
H22A1 = 31.0mm/1.221
H22A4 = 31.0mm/1.221
H23A = 30.5mm/1.203
H23A1 = 30.5mm/1.203
F20A = ???
F20B = 31.0mm/1.221
F22A = 30.5mm/1.203
F22B = 30.5mm/1.203
F22B1 = 30.5mm/1.203
F22B2 = 30.5mm/1.203
F23A = 30.0mm/1.181

PISTON VOLUME
H22A = -1.9 cc
H22A Type S = +4.2 cc
H22A1 = -1.8 cc
H22A4 = -1.8 cc
H23A = +4.3 cc
H23A1 = -9.9 cc
F20A = -4.7 cc
F20B = +8.0 cc
F22A = -14.5 cc
F22B = -11.2 cc
F22B1 = -14.5 cc
F22B2 = -14.5 cc
F23A = -18.0 cc

WRIST PIN DIAMETER
H22A = 22.0mm/.866
H22A1 = 22.0mm/.866
H22A4 = 22.0mm/.866
H23A = 22.0mm/.866
H23A1 = 22.0mm/.866
F20A = 22.0mm/.866
F20B = 22.0mm/.866
F22A = 22.0mm/.866
F22B = 22.0mm/.866
F22B1 = 22.0mm/.866
F22B2 = 22.0mm/.866
F23A = 22.0mm/.866

Crankshafts

STROKE
H22A = 90.7mm/3.570
H22A1 = 90.7mm/3.570
H22A4 = 90.7mm/3.570
H23A = 95mm/3.740
H23A1 = 95mm/3.740
F20A = 88mm/3.464
F20B = 88mm/3.464
F22A = 95mm/3.740
F22B = 95mm/3.740
F22B1 = 95mm/3.740
F22B2 = 95mm/3.740
F23A = 97mm/3.818

MAIN JOURNAL DIAMETER
H22A = 50mm
H22A1 = 50mm
H22A4 = 55mm
H22A4 = 50mm (1997 Only)
H23A = 55mm
H23A1 = 50mm
F20A = 50mm
F20B = 55mm
F22A = 50mm
F22B = 50mm
F22B1 = 50mm
F22B2 = 50mm
F23A = 55mm

ROD JOURNAL DIAMETER
H22A = 47.95mm/1.888
H22A1 = 47.95mm/1.888
H22A4 = 47.95mm/1.888
H23A = 47.95mm/1.888
H23A1 = 47.95mm/1.888
F20A = 47.95mm/1.888
F20B = 44.98mm/1.771
F22A = 47.95mm/1.888
F22B = 47.95mm/1.888
F22B1 = 47.95mm/1.888
F22B2 = 47.95mm/1.888
F23A = 44.98mm/1.771

Cylinder Heads

HEAD VOLUME
H22A = 53.8cc
H22A1 = 53.8cc
H22A4 = 53.8cc
H23A = 53.8cc
H23A1 = 50.0cc
F20A = 50cc
F20B = ???
F22A = 50.5cc
F22B = 50.5
F22B1 = 50.6cc
F22B2 = 50.6cc
F23A = ???

INTAKE VALVE DIAMETER
H22A = 35mm/1.38
H22A1 = 35mm/1.38
H22A4 = 35mm/1.38
H23A = 35mm/1.38
H23A1 = 34mm/1.34
F20A = 34mm/1.34
F20B = 34mm/1.34
F22A = 34mm/1.34
F22B = 34mm/1.34
F22B1 = 34mm/1.34
F22B2 = 34mm/1.34
F23A = 34mm/1.34

EXHAUST VALVE DIAMETER
H22A = 30mm/1.18
H22A1 = 30mm/1.18
H22A4 = 30mm/1.18
H23A = 30mm/1.18
H23A1 = 29mm/1.14
F20A = 29mm/1.14
F20B = 29mm/1.14
F22A = 29mm/1.14
F22B = 29mm/1.14
F22B1 = 29mm/1.14
F22B2 = 29mm/1.14
F23A = 29mm/1.14

Head Gaskets

BORE
H22A = 88mm/3.46
H22A1 = 88mm/3.46
H22A4 = 88mm/3.46
H23A = 88mm/3.46
H23A1 = 88mm/3.46
F20A = 85.5mm/3.37
F20B = 85.5mm/3.37
F22A = 85.5mm/3.37
F22B = 85.5mm/3.37
F22B1 = 85.5mm/3.37
F22B2 = 85.5mm/3.37
F23A = 86.5mm/3.41

THICKNESS
H22A = 0.66mm/.026
H22A1 = 0.66mm/.026
H22A4 = 0.66mm/.026
H23A = 0.66mm/.026
H23A1 = 0.66mm/.026
F20A = 0.66mm/.026
F20B = 0.66mm/.026
F22A = 0.66mm/.026
F22B = 0.66mm/.026
F22B1 = 0.66mm/.026
F22B2 = 0.66mm/.026
F23A = 0.66mm/.026

Note:
Gasket thickness measured after crush

Bearings

MAIN BEARING THICKNESS
Blue: 2.013 - 2.010mm / 0.0793 - 0.0791
Black: 2.010 - 2.007mm / 0.0791 - 0.0790
Brown: 2.007 - 2.004mm / 0.0790 - 0.0789
Green: 2.004 - 2.001mm / 0.0789 - 0.0788
Yellow: 2.001 - 1.998mm / 0.0788 - 0.0787
Pink: 1.998 - 1.995mm / 0.0787 - 0.0785
Red: 1.995 - 1.992mm / 0.0785 - 0.0783

ROD BEARING THICKNESS
Blue: 1.510 - 1.507mm / 0.0594 - 0.0593
Black: 1.507 - 1.504mm / 0.0593 - 0.0592
Brown: 1.504 - 1.501mm / 0.0592 - 0.0591
Green: 1.501 - 1.498mm / 0.0591 - 0.0590
Yellow: 1.498 - 1.495mm / 0.0590 - 0.0589
Pink: 1.495 - 1.492mm / 0.0589 - 0.0587
Red: 1.492 - 1.489mm / 0.0587 - 0.0586

MAIN BEARING WIDTH
H22A = 19.9mm/.784
H22A1 = 19.9mm/.784
H22A4 = 19.9mm/.784
H23A = 19.9mm/.784
H23A1 = 19.9mm/.784
F20B = 19.9mm/.784
F22A = 19.9mm/.784
F22B = 19.9mm/.784
F22B1= 19.9mm/.784
F22B2= 19.9mm/.784
F23A = 19.9mm/.784

ROD BEARING WIDTH
H22A = 19.35mm/.762
H22A1 = 19.35mm/.762
H22A = 19.35mm/.762
H23A = 19.35mm/.762
H23A1 = 19.35mm/.762
F20A = 19.35mm/.762
F20B = 19.35mm/.762
F22A = 19.35mm/.762
F22B = 19.35mm/.762
F22B1 = 19.35mm/.762
F22B2 = 19.35mm/.762
F23A = 15.47mm/.609

** Full credit goes to Innovation, PirateMcFred, prelittledude, Jdogg, ZigenBallz and HondaFan81 for this information. **

Does an H22 head fit an F22 BLOCK.

I say no. She doesnt believe me. Help me fellas!

JDM 90 4DR DA=> SOLD

WTB EF HATCH SHELL!!!!!!!!

"Its always been my lifelong dream to die... I just hope that its at the end of my life."

JDM 90 4DR DA=> SOLD

WTB EF HATCH SHELL!!!!!!!!

like stated above, search. Or better yet, go into the FAQ and under the Swaps section you'll see some links to it. Lots of info on that swap out there.

not a sticky, too many as it is... but I will add this to the FAQ

89 Accord Lxi Sedan:SOLD
96 Accord EX Coupe:SOLD
90 Integra GS:Current Project

right, we don't post the info straight into the FAQ. the user makes a thread for the info, then we link that thread into the FAQ

The piston volume for the F23's are not all the same.

The F23A1/A4 are -13.6. The F23A5 has a piston volume of -18.

Just a heads up.

An on ramp is a terrible thing to waste

importparts.com evasivemotorsports.com weaksauce.org

An on ramp is a terrible thing to waste

not cast, but iron yes

i don't have ADD, i just have trouble giving a shit about what other people say and do