Honda / Acura K20a K24a Engine Forum banner
1 - 3 of 3 Posts

·
Super Moderator
2002 DC5 Type S
Joined
·
2,065 Posts
Discussion Starter · #1 · (Edited)
Standards & Service Limits are typically found in service manuals from the factory and inforamtion from the factory service manual should be used first before any other form or source of this information. Once I can find a service manual for the Honda Integra Type R (DC5), I can add specific information into this thread. However, 90% of that information can be found using the DC5 Type S service manual. Please, I am asking please if anyone has information to add to this thread to post it up.

Ignition Coil
  • rated voltage = 12V
  • firing order = 1 - 3 - 4 - 2

Spark Plug
- K20A3 = NGK: IZFR6K11 | Denso: SKJ20DR-M11
- K20A2 = NGK: IFR7G-11K, NGK: IFR7G-11KS | Denso: SK22PR-M11, Denso: SK22PR-M11S
- Gap = 1.0 - 1.1 mm ( 0.039 - 0.043 in )

Ignition Timing ( @ idle check red mark )
  • M/T in neutral : 8 +/- 2 degree BTDC @ 700 +/- 50rpm (K20A2)
  • M/T in neutral 650 +/- 50rpm (K20A3)


Alternator (Mitsubishi)
  • Output = @ 13.5V and normal engine temp. = 90A
  • Coil Resistance = @ 68 degree F (20 degree C) 1.84 - 2.10 OHM
  • Slip-Ring O.D. = 22.7 mm ( 0.89 in ) New
= 21.7 mm ( 0.85 in ) Service Limit
- Brush Length = 19.0 mm ( 0.75 in ) New
= 5.0 mm ( 0.20 in ) Service Limit
- Brush Spring Tension = 3.3 - 4.1 N ( 0.34 - 0.42 kgf, 0.7 - 0.9 lb ) New

Alternator (Denso)

  • Output = @ 13.5V and normal engine temp. = 95A
  • Coil Resistance = @ 68 degree F (20 degree C) 2.2 - 3.0 OHM
  • Slip-Ring O.D. = 14.4 mm ( 0.57 in ) New | 14.0 mm ( 0.55 in ) Service Limt
  • Brush Length = 10.5 mm ( 0.41 in ) New | 1.5 mm ( 0.06 in ) Service Limit
  • Brush Sprin Tension = 2.9 - 3.5 N ( 0.30 - 0.36 kgf, 0.7 - 0.8 lb ) New

Starter (Mitsuba)
  • Output = 1.2kW
  • Commutator Mica Depth = 0.4 - 0.5 mm ( 0.016 - 0.020 in ) New | 0.15 mm ( 0.006 in ) Service Limit
  • Commutator Runout = 0.02mm ( 0.001 in ) New Max | 0.05mm ( 0.002 in ) Service Limit
  • Commutator O.D. = 28.0 mm ( 1.10 in ) New | 27.5 mm ( 1.083 in ) Service Limit
  • Brush Length = 11.1 - 11.5 mm ( 0.44 - 0.45 in ) New | 4.3 mm ( 0.17 in ) Service Limit

Starter (Denso)
  • Output = 1.1 kW
  • Commutator Mica Depth = 0.50 - 0.80 mm ( 0.020 - 0.031 in ) New | 0.20 mm ( 0.008 in ) Service Limit
  • Commutator Runout = 0.02 mm ( 0.001 in ) New Max | 0.05 mm ( 0.002 in ) Service Limit
  • Commutator O.D. = 28.0 mm ( 1.10 in ) New | 27.0 mm ( 1.06 in ) Service Limit
  • Brush Length = 14.0 - 14.5 mm ( 0.55 - 0.57 in ) New | 9.0mm ( 0.35 in ) Service Limit
- Brush Spring Tension = 13.7 - 17.7 N ( 1.40 - 1.80 kgf, 3.09 - 3.97 lb ) New
 

·
Super Moderator
2002 DC5 Type S
Joined
·
2,065 Posts
Discussion Starter · #2 · (Edited)
I pulled this below from the 02-06 RSX service manual. It covers the K20z1 as well. Finding if there is a difference on the K20a Type R engine, well I haven't got that far.
 

·
Super Moderator
2002 DC5 Type S
Joined
·
2,065 Posts
Discussion Starter · #3 · (Edited)
Engine Assembly

Cylinder Head

Item Measurement Qualification Standard or New Service Limit

Item Measurement Qualification Standard or New Service Limit

2-3

Compression Pressure

- Check the engine with the starter
cranking

  • Minimum 930 kPa (9.5 kgf/cm , 135 psi)
  • Maximum variation 200 kPa (2.0 kgf/cm , 28 psi)

Head Warpage = 0.05 mm (0.002 in.) Service Limit

Height = 103.95 - 104.05 mm (4.093 - 4.096 in.) New

Camshaft End play = 0.05 - 0.20 mm (0.002 - 0.008 in.) New | 0.4 mm (0.02 in.) Service Limit
Camshaft-to-holder oil clearance =
No. 1 journal - 0.030 - 0.069 mm (0.001 - 0.003 in.) New | 0.15 mm (0.006 in.) Service Limit

No. 2, 3, 4, 5 journals - 0.060 - 0.099 mm (0.002 - 0.004 in.) New | 0.15 mm (0.006 in.) Service Limit

Total runout- 0.03 mm (0.001 in.) max. New | 0.04 mm (0.002 in.) Service Limit

Cam lobe height
(K20A3 engine) -
Intake, primary = 33.925 mm (1.3356 in.)
Intake, secondary = 29.638 mm (1.1668 in.)
Exhaust = 34.092 mm (1.3422 in.)

Cam lobe height
K20A2 (2002-2004 models), K20Z1
(2005-2006 models) engines -
Intake, primary = 32.791 mm (1.2910 in.)
Intake, mid = 35.534 mm (1.3990 in.)
Intake, secondary = 32.678 mm (1.2865 in.)
Exhaust, primary = 32.772 mm (1.2902 in.)
Exhaust, mid = 34.768 mm (1.3688 in.)
Exhaust, secondary = 32.661 mm (1.2859 in.)

Valve
Clearance Cold

Intake Valve = 0.21 - 0.25 mm (0.008 - 0.010 in.) New

Exhaust
(K20A3 engine) =
0.28 - 0.32 mm (0.011 - 0.013 in.) New

Exhaust
K20A2
(2002-2004
models), K20Z1
(2005-2006
models)
engines -
0.25- 0.29 mm (0.010 - 0.011 in.) New

Stem O.D.
Intake = 5.475 - 5.485 mm (0.2156 - 0.2159 in.) New | 5.445 mm (0.214 in.) Service Limit
Exhaust = 5.450 - 5.460 mm (0.2146 - 0.2150 in.) New | 5.42 mm (0.213 in.) Service Limit

Stem-to-guide clearance
Intake = 0.030 - 0.055 mm (0.0012 - 0.0022 in.) New | 0.08 mm (0.003 in.) Service Limit
Exhaust = 0.055 - 0.080 mm (0.0022 0.0031 in.) New | 0.11 mm (0.004 in.) Service Limit

Valve seat Width
Intake = 1.25 - 1.55 mm (0.049 - 0.061 in.) New | 2.00 mm (0.079 in.) Service Limit
Exhaust = 1.25 - 1.55 mm (0.049 - 0.061 in.) New | 2.00 mm (0.079 in.) Service Limit

Valve Seat Stem installed height
Intake = 44.0 - 44.5 mm (1.73 - 1.75 in.) New | 44.7 mm (1.76 in.) Service Limit
Exhaust = 44.1 - 44.6 mm (1.74 - 1.76 in.) New | 44.8 mm (1.76 in.) Service Limit

Valve spring Free length
(K20A3 engine)

Intake = 47.61 mm (1.874 in.) New
Exhaust - NIPPON HATSUJO = 49.64 mm (1.954 in.) New
- CHUO HATSUJO: = 49.63 mm (1.954 in.) New

Free length
K20A2 (2002 model) engine

Intake, inner = 05.22 mm (1.780 in.) New
Exhaust, inner = 45.50 mm (1.791 in.) New
Intake, outer = 50.86 mm (2.002 in.) New
Exhaust, outer = 51.81 mm (2.040 in.) New

Free length
K20A2 (2003-2004 models),
K20Z1 (2005-2006 models) engines


Intake = 49.77 mm (1.959 in.) New
Exhaust = 50.39 mm (1.984 in.) New


Valve guide I.D.
Intake = 5.515 - 5.530 mm (0.2171 - 0.2177 in.) New | 5.55 mm (0.219 in.) Service Limit
Exhaust = 5.515 - 5.530 mm (0.2171 - 0.2177 in.) New | 5.55 mm (0.219 in.) Service Limit

Valve Guide Installed height
Intake = 15.2 - 16.2 mm (0.598 - 0.638 in.) New
Exhaust = 15.5 - 16.5 mm (0.610 - 0.650 in.) New

Rocker arm Arm-to-shaft clearance
Intake = 0.025 - 0.052 mm (0.0010 - 0.0020 in.) New | 0.08 mm (0.003 in.) Service Limit

Exhaust
(K20A3 engine) = 0.018 - 0.056 mm (0.0007 - 0.0022 in.) New | 0.08 mm (0.003 in.) Service Limit

Exhaust
K20A2
(2002-2004
models), K20Z1
(2005-2006
models)
engines = 0.025 - 0.052 mm (0.0010 - 0.0020 in.)New | 0.08 mm (0.003 in.) Service Limit

Engine Block

Block Warpage of deck = 0.07 mm (0.003 in.) max. New | 0.10 mm (0.004 in.) Service Limit

Bore diameter A or l = 86.010 - 86.020 mm (3.3862 - 3.3866 in.) New |
86.070 mm (3.3886 in.) Service Limit

Bore diameter B or ll = 86.000 - 86.010 mm (3.3858 - 3.3862 in.) New |
86.070 mm (3.3886 in.) Service Limit

Bore taper = 0.05 mm (0.002 in.) Service Limit

Reboring limit = 0.25 mm (0.01 in.) Service Limit

Piston

Skirt O.D. at 11 mm (0.4 in.) from bottom of skirt

(Qualification) - No letter or A = 85.980 - 85.990 mm (3.3850 - 3.3854 in.) New |
85.930 mm (3.3831 in.) Service Limit
(Qualification) - Letter B = 85.970 - 85.980 mm (3.3846 - 3.3850 in.) New |
85.920 mm (3.3827 in.) Service Limit
Clearance in cylinder = 0.020- 0.040 mm (0.0008 - 0.0016 in.) New |
0.05 mm (0.002 in.) Service Limit

Piston Ring groove width Top
(K20A3 engine) =
1.220 - 1.230 mm (0.0481 - 0.0484 in.) New |
1.25 mm (0.049 in.) Service Limit


Top
K20A2
(2002-2004
models), K20Z1
(2005-2006
models)
engines =
1.235 - 1.245 mm ( 0.0486 - 0.0490 in.) New | 1.265 mm (0.0498 in.) Service Limit

Second
(K20A3 engine) =
1.220 - 1.230 mm ( 0.0481 - 0.0484 in.) New | 1.25 mm (0.049 in.) Service Limit

Second
K20A2
(2002-2004
models), K20Z1
(2005-2006
models)
engines =
1.230 - 1.240 mm ( 0.0484 - 0.0488 in.) New | 1.260 mm (0.0496 in.) Service Limit

Oil = 2.005 - 2.025 mm ( 0.0789 - 0.0797 in.) New | 2.05 mm (0.081 in.) Service Limit
 
1 - 3 of 3 Posts
Top