1997 RHD E-NA1 DBW AT JDM Cooling Hose Replacement - Required Parts

[Heineken]

Hello together,

As a long time lurker in this forum and happy NSX owner since 2014 (when I was still living in Tokyo) my car is now registered in Germany and awaiting replacement of the cooling hoses.
After checking online (NSXCB, epc-data.com, jp-carparts.com) the following list of parts was created:

Part Number	Amount	English	Notice
19103-PR7-A00	1	HOSE, EXPANSION UPPER
19104-PR7-A00	1	HOSE, EXPANSION LOWER
19107-PR7-A00	1	TUBE, OVERFLOW
19501-PR7-000	1	HOSE, FRONT WATER UPPER (YELLOW PAINT)
19502-PR7-010	1	HOSE, FRONT WATER LOWER (YELLOW PAINT)
19506-PR7-A01	1	HOSE, REAR WATER UPPER (WHITE PAINT)
19507-PR7-A01	1	HOSE, REAR WATER LOWER (YELLOW PAINT)
19518-PR7-A00	1	HOSE, WATER UPPER MIDDLE
19519-PR7-A00	1	HOSE, WATER LOWER MIDDLE
79721-SL0-010	1	HOSE A, WATER INLET
79722-SL0-A00	1	HOSE, WATER INLET (HEATER)
79725-SL0-A00	1	HOSE,WATER OUTLET (HEATER)
79726-SL0-000	1	HOSE A, WATER JOINT
79727-SL0-A00	1	HOSE A, REAR WATER OUTLET
79728-SL0-A00	1	HOSE, WATER INLET (ENGINE)
19422-PR7-A01	1	HOSE, OIL COOLER INLET
19423-PR7-A00	1	HOSE A, OIL COOLER OUTLET
19424-PR7-A00	1	HOSE B, OIL COOLER OUTLET
19429-PR7-A10	1	HOSE,ATF COOLER INLET
19430-PR7-A10	1	HOSE,ATF COOLER OUTLET
19522-PR7-J02	1	HOSE A, BY-PASS	Replacement part for 19522-PR7-J01
19524-PR7-A01	1	HOSE B, BY-PASS
19526-PR7-A00	1	HOSE E, BY-PASS
91318-PY3-000	1	PACKING OIL PUMP	'8' sealing oil cooler
19012-PD2-004	2	PACKING DRAIN (T.RAD)	Radiator bleeding screw o-ring
90471-580-000	2	PACKING 8MM	Washer for center floor cooling pipe
19045-PR7-J24	1	CAP COMP. (SHOWA ALUMINUM)
19101-PR7-A02	1	TANK COMP., EXPANSION
19301-P8E-A10	1	THERMOSTAT ASSY. (NIPPON THERMOSTAT)
19511-PR7-A01	12	CLIP. WATER HOSE (40.7MM)
19512-PC6-003	6	CLIP. HOSE 18.7MM
19513-PE0-003	12	CLAMP, WATER HOSE (21.7MM) (CHUO SPRING)
90661-SL0-A01	6	CLIP. HEATER HOSE 30MM
95002-412-5004	8	CLAMP, TUBE (D12.5)
95002-700-00	1	CLIP. TUBE (C11)
08CLA-G02-6L0	1	4x 5L LONG LIFE COOLANT

The first question would be: Is the list complete and matching the cooling system of a stock 1997 RHD E-NA1 DBW AT JDM NSX (VIN: 1400005)? - done, thanks Kaz -

Secondly, what would be the best option to buy the parts? Honda Germany is notoriously expensive (e.g. 250 Euro for a coolant tank). Some US parts-dealers are offering international shipping. I could aks one of my Japanese colleagues (it would be a bit of an effort for them and I would like to help them in a similar way, too). I also heard that KAZ is selling complete sets (?)

[PeterW]

I‘m not sure how the price compares, but you can buy a complete set from Science of Speed. At least you won’t have to worry about whether you got all the part numbers right. They sell right hand drive and LHD sets. https://www.scienceofspeed.com/index...and-drive.html

Peter

[Heineken]

Hi Peter

Thanks for the tip. I did another (re-)search and came up with the following options (all without cooling tank as it's more or less new):

• amayama.com (individual parts)
  408.67 € + 33.91 € shipping + 19 % tax: 526.67 € (+ import duty)
• theNSXshop (thanks, Kaz)
  $ 655.00 + $ 130.00 shipping + 19 % tax: 765.91 € (+ import duty)
• jp-carparts.com (individual parts)
  円 62090 + 19 % tax: 545.06 € (+ import duty)
• Acurapartswarehouse (individual parts - RHD parts missing: 19501-PR7-000, 19502-PR7-010, 79721-SL0-010, 79726-SL0-000 and 79727-SL0-A00)
  $ 549.91 + $ 88.17 shipping + 19 % tax: 622.57 € (+import duty)
• AS Motorsport (no thermostat, no clamps, no washers)
  556.60 € + 13 € shipping: 569.60 € (final price)
• Science of Speed (no thermostat, no clamps, no washers)
  $ 503.95 + $ 309 shipping: 666.37 € (+tax? +import duty?)

Unless there's another option it looks like either AS Motorsport, Amayama or asking someone in Japan to buy it locally, I guess.

[Kaz-kzukNA1]

For the parts, please contact nsxcb vendor - Adnan at A.S. Motorsport or if you prefer ordering direct from Japan, then Marc should be able to help you. He runs parts business in Japan and NSX Prime vendor - theNSXshop.com

For JDM NA1-140type AT model, you need the followings. I'll just cut & paste the list from my other post and modify it for your spec.

Questions/info in your OP are either old, superseded or wrong info.

Basically, you need the same kit as RHD NA2 plus the two hoses for ATF cooler and the hose bands for them.

The parts system at US Acura/Honda dealers won't allow them placing the order for RHD specific coolant hoses (4 of them).

For JDM NA1-140type AT.

*** Radiator ***
(Koyo Rad, V2032)
(bolts for cooling fan shroud)

*** Coolant Hose, RHD, NA1, DBW, AT, 97+ ***
19103-PR7-A00 x 1
19104-PR7-A00 x 1
19107-PR7-A00 x 1
19501-PR7-000 x 1
19502-PR7-010 x 1
19506-PR7-A01 x 1
19507-PR7-A01 x 1
19518-PR7-A00 x 1
19519-PR7-A00 x 1
79721-SL0-010 x 1
79722-SL0-A00 x 1
79725-SL0-A00 x 1
79726-SL0-000 x 1
79727-SL0-A00 x 1
79728-SL0-A00 x 1
19422-PR7-A01 x 1
19423-PR7-A00 x 1
19424-PR7-A00 x 1
19522-PR7-J02 x 1
----------------------
19524-PR7-A01 x 1
19526-PR7-A00 x 1

19429-PR7-A10 x 1 ATF Cooler, AT ONLY
19430-PR7-A10 x 1 ATF Cooler, AT ONLY

*** Figure of '8', rad drain/bleeder o-ring, aluminium gasket ***
91318-PY3-000 x 1
19012-PD2-004 x 2
90471-580-000 x 2

*** Cap, header tank, thermostat ***
19045-PR7-J24 x 1
19101-PR7-A02 x 1
19301-P8E-A10 x 1

*** coolant hose cramp ***
Some can be re-used if you know the original condition.
If not, replace them.
Not worth the risk.

19511-PR7-A01 x 12　　big one
19512-PC6-003 x 6　 　low tension, header tank, 4 of them are for the ATF cooler, AT ONLY
19513-PE0-003 x 12　　high tension
90661-SL0-A01 x 6　　 pre-set type
95002-4125004 x 8　　 small one
95002-70000 x 1　　　 overflow tube

*** Honda Type-2 coolant ***
Please note that the coolant parts no. would be different depending on the country you are ordering from so please ask your local Honda/Acura dealer.

08CLA-G01-8L0 x 3 (if ordering 4, then please check the price of 08CLA-G02-6L0 x 1. Basically, set of 4 bottles of G01-8L0 but could be cheaper to buy as a single set)

You will need about 16.2 - 16.5L minimum. NA2 is more like 16.2L minimum.
Although each container comes in 5L size, it actually holds about 5.45L so you need bit more for bleeding process especially if you don't use special tool for filling up the coolant.
Or, if you live in a country that doesn't get freezing cold against the min temperature spec of premixed concentration (50/50), then you can dilute it but replace at much earlier state such as every 2 years.
From cooling efficiency point of view, 50/50 is not great and many owners in Japan who tracks their NSX are using about 30% concentration with shorter service interval.

*** lots of silicone/rubber grease + time ***


If you have the aftermarket parts, removed the engine bay cover, etc, some of the parts in the above list won't be suitable for the purpose without the extra parts/protection/process.


Kaz

[Heineken]

Hello Kaz,

Thank you very much for the clarification regarding the parts. I've updated the OP accordingly (if it's missing it's under clearance by an administrator).
Marc's option has been added to my later post. Good to know there are further options.

Lars

[UnhuZ]

Hi Kaz,

*** Figure of '8', rad drain/bleeder o-ring, aluminium gasket ***
91318-PY3-000 x 1
19012-PD2-004 x 2
90471-580-000 x 2

the gasket i highlighted in blue on your list, it only shows me as a gasket
for a bolt in the MT transmission, at least in my parts diagram.
(from US online catalog)

Where in the coolant circuit is it?

Thanks,
Nuno

[Kaz-kzukNA1]

Hi, Nuno.
The two coolant drain ports at the centre floor channel.
Same on US online parts system.


Kaz

[Heineken]

Update to an old thread of mine - parts are now ordered - from Amayama - Prices (in Euro) have increased by 4 % in the last 3 years.
I'll keep you updated once there are news.

[Heineken]

Bad news. The following items are not available (no delivery date from Honda):

Honda 19501-PR7-000 - HOSE, FR. WATER UPPER (YELLOW PAINTED)
Honda 19502-PR7-010 - HOSE, FR. WATER LOWER (YELLOW PAINTED)
Honda 19511-PR7-A01 - CLIP, WATER HOSE (40.7MM)

These are delayed up to three months:

Honda 19518-PR7-A00 - HOSE, WATER UPPER MIDDLE
Honda 19519-PR7-A00 - HOSE, WATER LOWER MIDDLE
Honda 79721-SL0-010 - HOSE A, WATER IN
Honda 79726-SL0-000 - HOSE A, WATER JOINT
Honda 79727-SL0-A00 - HOSE B, WATER JOINT

[Heineken]

All delayed items were delivered and the shipment is under way.

Items without delivery date are being re-checked for availability (and will have to be ordered separately:
Honda 19501-PR7-000 - HOSE, FR. WATER UPPER (YELLOW PAINTED)
Honda 19502-PR7-010 - HOSE, FR. WATER LOWER (YELLOW PAINTED)
Honda 19511-PR7-A01 - CLIP, WATER HOSE (40.7MM)