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View Full Version : USDM parts that will fit the JDM 3g Accord/ 2g Prelude B20A



carotman
01-20-2004, 06:10 AM
Well, I see alot of people asking where to get that part and that part and another part from local USDM cars when rebuilding their B20A.

I will try to do a list of most of the parts available in the US for your B20A engine.


Here are the parts and the USDM engine/car it corresponds

---------Part ---------- Engine ---- Car------------------

Axle (Right side) ------ A20A ---- (Need to use a 88-89 Prelude inner joint)
Camshafts --------------- B18A1 ---- (Acura Integra 90-93 non vtec, some work involved)
Clutch disc ------------- B20A5 ---- (Prelude 2.0si 88-89)
Crank bearings ---------- B20A5 ---- (Prelude 2.0si 88-91)
Crank sensor assembly (1) B20A5 ---- (Prelude 2.0si 88-91)
Crank sensor assembly (2) D16A1 ---- (Acura Integra 86-87) *used with a Vacuum Advance Accord ECU*
Distributor assembly (1)- B20A5 ---- (Prelude 2.0si 88-91)
Distributor assembly (2)- D16A1 ---- (Acura Integra 86-87) *used with a Vacuum Advance Accord ECU*
Exhaust manifold gasket - B20A5 ---- (Prelude 2.0si 88-91) *stud holes do not match perfectly, can be easily fixed*
Intake manifold --------- A20AX ---- (Accord 86-89)
Intake manifold gasket -- A20AX ---- (Accord 86-89)
Pistons ----------------- B20A5 ---- (Prelude 2.0si 88-91)
Piston Rings ------------ B20A5 ---- (Prelude 2.0si 88-91)
Pressure plate ---------- B20A5 ---- (Prelude 2.0si 88-89)
Rear main seal ---------- B20A5 ---- (Prelude 2.0si 88-91)
Rods -------------------- B20A5 ---- (Prelude 2.0si 88-91)
Shift rod seal ---------- A20AX ---- (Accord 86-89)
Spark plug wires (1) ---- B20A5 ---- (Prelude 2.0si 88-91) *use with B20A5 distributor*
Spark plug wires (2) ---- B18A1 ---- (Acura Integra 90-93) *should be fine with the JDM Accord/86-87 Integra distributor*
Starter assy ------------ A20AX ---- (Accord 86-89) *With auto transmission*
Throw out Bearing ------- B18A1 ---- (Acura Integra 90-93 non vtec)
Valves ------------------ B20A5 ---- (Prelude 2.0si 88-91)
Valve Cover gasket set -- B20A5 ---- (Prelude 2.0si 88-91)
Valve seals ------------- B20A5 ---- (Prelude 2.0si 88-91)
Water Pump Assembly ----- B20A3 ---- (Prelude S 88-89)

-------------------------------------------------------------


That list is far from complete. I do have more I need to post (have it written somewhere)
Feel free to submit the parts you find.

TWOLOUDNPROUD
02-14-2007, 09:27 PM
B20a Timing Belt (Gates P/N-T188)

bullard123
04-05-2007, 05:32 AM
A20A3 transmission/ B18a bellhousing

2oodoor
03-29-2008, 12:57 PM
A20A3 transmission/ B18a bellhousing

b18a bellhousing is not USDM, however the A20 tranny is

2oodoor
09-29-2008, 07:59 AM
B20a Timing Belt (Gates P/N-T188)

Also Gates T-249

2ndGenGuy
03-15-2009, 01:17 PM
The water pipe o-ring for the B20A is the same as the A20 o-ring.

OldSchool86
05-12-2009, 01:21 PM
D16(s20) speed sensor will fit the b20a and the a20a trans. so if you want to run an electric speedo it will work.
let me rephrase...

the speed sensor out of the b20a auto trans fits and works in the d16(s20) trans...so...it should be the same vice-versa.

Ichiban
08-22-2009, 11:42 AM
I noticed the rear main seal interchanges with the B20A5. Does anyone know about the front main, or the rear main seal retainer gasket?

AccordB20A
08-22-2009, 01:33 PM
i thought the b20a and b20a5 were pretty much the same apart from having different bolt up patterns on the head bellhousing and engine mounts

2ndGenGuy
08-22-2009, 01:33 PM
They share crankshafts, so I imagine that the crank seals would interchange. Not sure about the retainer gasket though.

carotman
08-22-2009, 05:55 PM
yeah, the main seals are the same. I changed mine with a B20A5 seal.

Ichiban
08-23-2009, 02:38 PM
yeah, the main seals are the same. I changed mine with a B20A5 seal.

Was the rear main retainer gasket the same though?

carotman
08-23-2009, 03:21 PM
Err, diagram please?

Ichiban
08-26-2009, 03:19 PM
I'm starting to believe that the rear main retainer block doesn't actually have a gasket, it's just sealed with black RTV, in which case, yes, it interchanges quite fine.

2oodoor
04-26-2010, 03:01 PM
oil pump same??

carotman
04-27-2010, 07:11 AM
The oil pump housing is different.

1st gen B20A (86-89 Accord and 86-87 Prelude):
Parts list: http://www.hondaworld.ru/honda_spare/details_car_4249_spare_E__1301_category_1/
http://www.hondaworld.ru/images/spare1/17SE801/E__1301.gif

2nd gen B20A (Prelude 88-91):
Parts List:http://www.hondaworld.ru/honda_spare/details_car_20719_spare_E__1300_category_1/
http://www.hondaworld.ru/images/spare1/17SF101/E__1300.gif

However, all the internal parts can be cross referenced from other Honda engines.

This means that if you can' get a "new pump" you can always rebuild it if the housing is in good condition

In case the Hondaworld.ru site is down, here are the part numbers:
1 11104-PH3-000 SEPARATOR, OIL
2 15100-PJ5-020 Насос масляный
3 15111-PH3-020 BODY, OIL PUMP
4 15112-PH3-020 COVER, OIL PUMP
5 15131-PH3-023 ROTOR, PUMP INNER
6 15132-PH3-013 ROTOR, PUMP OUTER
7 15205-PH3-003 GASKET, OIL FILTER BASE (ARAI)
7 15205-PH3-004 GASKET, OIL FILTER BASE (NOK)
8 15220-PH3-000 STRAINER COMP., OIL
9 15231-PE0-000 VALVE, RELIEF
10 15232-PG6-000 SPRING, RELIEF VALVE
11 15233-PC6-000 BOLT, SEALING, 18MM
12 15234-PC6-000 WASHER, SEALING, 18MM
13 15301-PH3-000 BASE, OIL FILTER
14 15400-PH1-014 Фильтр масляный (TOYO ROKI)
14 15400-PK1-003 Фильтр масляный (TOKYO ROKI)
14 15400-PH1-F02 Фильтр масляный (LABINAL-PURFLUX)
15 15500-PH3-005 COOLER, ENGINE OIL (TSUCHIYA)
15 15500-PH3-014 COOLER, ENGINE OIL (DENSO)
16 15570-PH3-003 BOLT ASSY., OIL COOLER CENTER
17 90041-PA5-000 BOLT, STUD, 6X28
18 90052-PK1-000 BOLT, FLANGE, 6X25
19 91212-PJ5-013 OIL SEAL, 38X53X7
20 91307-PE0-010 O-RING, 25X2.4
21 91310-PH3-003 O-RING, 18X2.4
22 91316-PE7-730 O-RING, 62.4X3.1
23 92900-080-281B BOLT, STUD, 8X28
24 93600-060-160A SCREW, FLAT, 6X16
25 9405-008-080 Гайка 8MM
26 9430-108-140 DOWEL PIN, 8X14
27 95700-060-1008 BOLT, FLANGE, 6X10
28 95700-060-5008 BOLT, FLANGE, 6X50
29 95701-060-1608 BOLT, FLANGE, 6X16
30 95701-080-3208 BOLT, FLANGE, 8X32

You can search for USDM part numbers there:
www.hondapartsdeals.com.

You'll see that everything is available from Honda un North America to rebuild your oil pump.

toxicshock
03-13-2011, 07:21 AM
does anyone know if the head off the b20a out of the 2g prelude will fit on a b20a5 block

89B20ALUDE
04-14-2011, 10:53 PM
They share crankshafts, so I imagine that the crank seals would interchange. Not sure about the retainer gasket though.

I just put a jdmB20a in my 89 prelude and from what I can tell everything was comparable except for the clutch.

89B20ALUDE
04-14-2011, 10:57 PM
i thought the b20a and b20a5 were pretty much the same apart from having different bolt up patterns on the head bellhousing and engine mounts

The b20a and b20a5 are exactly alike except for the came and clutch. The C/R is slightly higher also

89B20ALUDE
04-14-2011, 11:01 PM
I'm looking for performance parts for my b20a any ideas

bullard123
06-10-2013, 10:25 AM
What about the a20 and b20a alternators? I know i have a b20a one. Anyone know if they are the same?

2ndGenGuy
06-10-2013, 11:16 AM
I don't know if it bolts 100% directly, but I was able to make my ES alternator bolt on to the B20A. I think I swapped the adjuster bracket, or ground the bracket slightly or something like that. The mount on the engine is the same though. I mean it was super super easy.

bullard123
06-10-2013, 11:36 AM
I don't know if it bolts 100% directly, but I was able to make my ES alternator bolt on to the B20A. I think I swapped the adjuster bracket, or ground the bracket slightly or something like that. The mount on the engine is the same though. I mean it was super super easy.

Ok cool. I think I remember them being the same. I found the part nuumber U.S. alternator but couldn't find the part# for the B20A alternator. Hopefully Carotman will check in soon to confirm. Thanks for the info

AccordB20A
06-11-2013, 12:03 AM
i rememberer the a20 alt having a different pulley?

2ndGenGuy
06-11-2013, 10:36 AM
Hmm yeah I can't remember if I swapped my crank pulley, or if I swapped the alternator pulley...

carotman
06-18-2013, 05:27 PM
The housing is different. They might be able to fit with pulley/bracket modifications.

If you have a bad alternator, you can get it rebuilt with local parts and keep your current housing.