Final Major Service 1991 Questions

[stv1991]

My NSX is 200+ miles away from the nearest dealer. I will be trailering it down in the next 30-45 days for these services:

WP/TB/Harmonic balancer
Oil pan gasket
Change tranny fluid
Flush brake fluid

My car is a 1991 and has 25,700 miles on it. Is it worth having the water hoses replaced? My understanding is it has more to do with heat/cool cycles than aging. Would that be correct?

What else if anything should I have looked into?

I have to order the parts prior to bringing the car down so everything is available once the car is in the shop. I plan on ordering the parts this week. Otherwise it sits until everything arrives.

Thanks in advance....

 

[Mikexike]

Valve cover gaskets, maybe cam seals...valve adjustment..CV BOOTS...

 

[nsxtasy]

Is it worth having the water hoses replaced?

Yes.

My understanding is it has more to do with heat/cool cycles than aging. Would that be correct?

No. Rubber can dry out, crack, and weaken over time, regardless of how many times the car has been driven during that period. Your hoses are 22 years old. You don't want to get stranded somewhere with a blown hose. Replace them now.

What else if anything should I have looked into?

Everything else in the maintenance schedule which has exceeded the recommended time and mileage interval since the previous service. (Note that they will be already flushing the coolant as part of the water pump replacement. But everything else that you didn't already mention, unless it's been done and not overdue to be done again.)

 

[nikey22]

-check your transmission serial number to see if you fall in the range of the snap ring issue with the tranny housing. (91-92 cars)
-A/C coolant should be converted to standards now (its probably R12)
-ABS flush as well as brake flush
-vtec gaskets

for 1991 cars that have gone through many miles - I'd also swap out the lost-motion assemblies, but since your car only has 22,000 miles (which is actually an incredible find), they haven't gone up/down much so their little piston mechanisms should be still okay

 

[JW]

While your at it, you might as well replace the thermostat along with all other things mentioned before. Just Saying!

91 NSX Red/Black
09 VW Jetta TDI White

 

[Shrink]

Take her off the trailer and let her enjoy the ride!

 

[Honcho]

Here is the list I used for what I call my "7-year service". This is for a 1991 NSX. If I were you, I would also do the coolant hoses, since you will save some labor.

Replace Timing Belt and Water Pump

(1) 14400-PR7-A01 BELT, TIMING (UNITTA)
(1) 19200-PR7-305 SET, WATER PUMP ASSY.
(1) 90401-634-000 RUBBER, TIMING BELT ADJUSTER
(1) 14510-PR7-A01 ADJUSTER, TIMING BELT
(1) 14516-PR7-A00 SPRING, TIMING BELT ADJUSTER
(1) 90016-P0G-A00 BOLT, SPECIAL TIMING BELT ADJUSTER
(2) 90471-580-000 GASKET (8MM)

Replace All Rubber Gaskets

(2) 12030-PR7-010 GASKET SET, HEAD COVER
(2) 36172-PR3-005 FILTER ASSY., SOLENOID
(2) 15825-PR3-005 FILTER ASSY., SPOOL VALVE
(1) 91318-PY3-000 GASKET, OIL PUMP
(4) 12513-PR7-A00 RUBBER, HEAD COVER SEAL
(1) 91214-PL2-003 OIL SEAL (98X80X10) (NOK)
(1) 11251-PH7-000 GASKET, OIL PAN
(4) 91213-PR7-A01 OIL SEAL (29X43X8)
(3) 91302-GE0-000 O-RING (8.8X1.9) (cyl head dowels, dipstick o-ring)


90k Service Plus Extra Items

(1) 13811-PR7-A02 PULLEY, CRANKSHAFT (replace every other TB job)
(6) 98079-5614H SPARK PLUG (PFR6G-11) (NGK)
(4) 46472-568-000 GASKET, OIL BOLT
(1) 57380-SL0-J02 HOSE, PRESSURE (ABS)
(1) 57370-SL0-J01 HOSE, PUMP (ABS)
(2) 57199-SB0-801 CLAMP, HOSE (14MM) (ABS)
(1) 31110-PR7-A01 BELT, ALTERNATOR (BANDO)
(1) 38920-PR7-A01 BELT, COMPRESSOR (BANDO)
(1) 91352-SD4-000 O-RING (8.8X1.9) (CLUTCH HOSE)
(1) 16010-SL0-932 FILTER SET, FUEL
(1) 17130-PR7-A01 VALVE ASSY., PCV
(1) 19301-P8E-A10 THERMOSTAT ASSY. (NIPPON THERMOSTAT)
(1) 19515-PH4-600 CAP, SEALING (7.3MM)
(1) 95002-41250-04 CLAMP, TUBE (D12.5)
(1) OIL FILTER
(6) OIL 1QT (Mobil1 10W30)
(1) AIR FILTER
(3) 08798-9031A TRANS FLUID 1QT
(1) VALVE ADJUST

 

[nsxtasy]

(6) OIL 1QT (Mobil1 10W30)

Just a quick note about oil here... Yes, you need to buy 6 quarts of oil (5.3 quarts are needed) and 10W30 is recommended. For most major brands of oil including Mobil 1, you can get a much better price by buying a five-quart jug at Walmart, along with a single extra quart, rather than buying 6 individual quarts.

For those who use Pennzoil Platinum full synthetic, or their superpremium Pennzoil Ultra full synthetic, they currently have a nice rebate offer, with a $10 rebate plus a $5 coupon on a purchase of five quarts. When you consider that Platinum runs around $23 for a five-quart jug at Walmart and Ultra around $27, that's a heck of a deal. Click here for details.

 

[LJZ]

Agree with nsxtasy on the hoses but FWIW I have a /94 with just under 40K miles that lived in CA and AZ (10 years in AZ in a climate controlled warehouse when not in use) up until approx 3.5 years ago and per my tech who is a 20+ year Acura veteran with a lot of NSX experience, in examining the hoses very carefully in my car he sees no evidence of any degradation at all. He also said that Honda hoses rarely fail. Now, I only mention this as a matter of interest. I have all of the hoses in a box in my garage and will do the job in the near term -- cheap insurance for sure. Better safe than sorry!

Best,
Jeff

 

[jsl757]

Honcho - newb question but is that list the same for a '92?

 

[nsxtasy]

Honcho - newb question but is that list the same for a '92?

Yes, the parts are identical for a '92 as for a '91.

 

[SFNSXguy]

I always inspected my water hoses carefully every year... but after 15 years of them still looking perfect I replaced them.
When I inspected all the removed/replaced hoses (inside and out) they were all like new -- but I felt better.
Your mileage may vary.

 

[shawn110975]

Honcho is right, those part numbers are for 91-92 shit starts to slowly change after 93

 

[Larry Bastanza]

He also said that Honda hoses rarely fail. Now, I only mention this as a matter of interest. I have all of the hoses in a box in my garage and will do the job in the near term -- cheap insurance for sure. Better safe than sorry!

I have rebuilt 4 NSX engines due to hose failure. "Rare" is a matter of perception.

Regards,
LarryB

 

[stv1991]

Thanks guys for the info. Looks like I will have to add a few things to my list. My transmission is not in the snap ring range.

 

[REDNSXT]

For those who use Pennzoil Platinum full synthetic, or their superpremium Pennzoil Ultra full synthetic, they currently have a nice rebate offer, with a $10 rebate plus a $5 coupon on a purchase of five quarts. When you consider that Platinum runs around $23 for a five-quart jug at Walmart and Ultra around $27, that's a heck of a deal. Click here for details.

Thanks Ken! I'm running the Ultra.