Hi from New Zealand.
I know this has been covered many times, but can I be pointed to a comprehensive article on procedure to replace the cambelt.
I also need to buy the parts and would appreciate good contacts.
As the water pump was replaced 15,000km ago, I am not planning to replace that.
While I am at it, I also plan to check/adjust valve clearances. Is there a special tool needed, or can one adapt something?
Thanks in advance
Kind Regards
Frank
Hi Frank-
You've come to the right place. I would order the parts from either MITA Motorsports or Amayama in Japan. MITA's website is down for maintenance, but both vendors are top-notch for the NSX.
You should refer to this link for the TB/WP procedure and use it in connection with the factory service manual procedure:
https://www.nsxprime.com/FAQ/DIY/timing-belt.pdf
Here is my TB/WP parts list. Keep in mind, this is for a 91-94 US Acura NSX. The parts may be different for your car and you should confirm with the vendor.
Honda Timing Belt (JDM) 1 06141-PR7-305
Timing Belt Adjuster 1 14510-PR7-A01
Valve Cover Gasket Set 2 12030-PR7-010
Water Pump Assy. 1 19200-PR7-305
Water Pump Bolts (special) 2 90049-PH7-000
Water Pump Bolts (special) 7 90052-PH7-000
Water Pump Dowels 2 94301-06100
Crush Washer 8mm 2 90471-580-000
Tensioner Bolt 1 90016-P0G-A00
Tensioner Bolt Washer 1 90031-PV0-305
Crank Pulley Bolt 1 90019-PR7-A01
Crank Pulley Key 1 90704-PH7-000
Crank Pulley (MT) 1 13811-PR7-A02
Tensioner Bolt Rubber 1 90401-634-000
Adjuster Spring 1 14516-PR7-A00
Oil Cooler Pedestal Special Bolts 2 90042-PR7-A00
Dipstick O-ring 1 91302-GE0-000
Oil Pump Gasket (Fig 8) 1 91318-PY3-000
Oil Filter 2 15400-PL2-315
Mobil One 0W-40 (5qt) 1
Mobil One 0W-40 (1qt) 1
Since you're going to be taking the engine apart partially, it is also a good time to perform the engine refresh service if it has never been done before. It's a few hundred dollars worth of additional parts, but your access will never be as good as it is now and your NSX will be sorted for at least another 10 years. Here are the parts you should replace:
Cam Plug 4 12513-PR7-A00
Rear Main Seal 1 91214-PL2-003
Oil Pan Gasket 1 11251-PH7-000
Cyl Head Dowel o-ring x2 2 91302-GE0-000
Oil Pump Seal 1 91212-PR7-A01
Spool Valve Solenoid O-Ring x2 2 36172-PR3-005
Spool Valve O-Ring x2 2 15825-PR3-005
Spool Valve Mount Bolts 6 95701-06030-08
Spool Valve Top Bolts x6 6 95701-06018-08
Oil Pressure Sensor O-Ring 1 91319-PR3-003
Camshaft seals 4 91213-PR7-A01
Water Passage O-Ring x 2 2 91313-PR7-A00
Water Pipe O-Ring x2 2 91314-PR7-A00
LMA Set 12 14820-PCB-305
Alternator Belt 1 31110-PR7-A01
Spark Plug x6 6 98079-5614H
A/C Belt 1 38920-PR7-A01
Oil Cooler O-ring 1 91316-PE7-730
Oil Cooler Bolt O-ring 1 91327-PH7-003
PCV Valve 1 17130-PR7-A01
Rocker Shaft Washers 8 12209-PR3-000
Rocker Shaft Bolts 8 12208-PR3-000
Rocker Shaft Orifice O-Rings 4 91306-PJ4-000
Block Coolant Plug O-Ring 1 91301-PR7-A00
Exhaust Manifold Studs 14 90026-PV0-000
Exhaust Manifold Nuts (NA2) 14 90217-657-000
Exhaust Manifold Gasket (NA2) 2 18115-PBY-J02
Coolant temp sensor (TW) 1 37870-PJ7-003
Hondabond HT 2 08718-0004
Block Drain Washers 2 90481-463-000
Crank Cyl Sensor (AYA) 1 37840-PR7-A03
Rear Coil Cover Gasket 1 12521-PR7-A00
Front Coil Cover Gasket 1 12511-PR7-A00
Oil Pan Pickup O-ring 1 91312-PR7-A00
Rear Main Seal Bolts 7 90052-PH7-000
Intake Manifold Studs 4 92900-080-400B
Alternator Grommet 1 31120-PR7-A00
If possible, I recommend removing the engine for this procedure. Limited access and visibility while the engine is in the car means a higher likelihood of making a mistake or missing something. Also, jobs like the valve adjustment and fitting the rear head cover without pinching the gasket are much, much easier. You will need a 3/4" impact gun to break the crank pulley nut, or about a 6-foot long pipe and sturdy breaker bar, along with a crank pulley holder. For the valve adjustment, you'll need this tool:
https://www.amazon.com/Powerbuilt-10mm-Valve-Adjusting-Honda/dp/B073WH1DBZ/ref=sr_1_1?dchild=1&keywords=10mm+valve+adjustment+tool&qid=1617376446&sr=8-1 If you're doing the job in the car, you'll need to cut down the screwdriver handle so it can fit in the rear bank. [MENTION=12494]R13[/MENTION] has a good demonstration in his YouTube video.
Hope this helps. I'll add the lists once I'm back home and can grab them from the computer.