Doing the coolant hoses has no overlap with anything he is doing.
Absolutely not true. You eliminate the redundancy of flushing the coolant more than once (it's done when replacing the water pump, and you would do it when replacing coolant hoses) and you also have the advantage of easier access to the hoses when you get access to the water pump.
I'm not sure why my advice to wait on coolant hoses for a 34K 2003 NSX is that bad.
Because (a) it involves less work and a lower cost to do it now (see above), and (b) it's the best example of preventive maintenance I can think of - replacing parts that commonly fail over time.
I would guess that more than half of 1991 and 1992 still have orignal hoses and have not failed.
I would guess that you are wrong on both counts.
Larry B works on NSXs all the time. Ask him how many failed original hoses he has seen. Ask him what condition those original 19-year-old hoses are in. Ask him if it's a good idea to replace them. Ask him if they should have been replaced many years ago.
Or, if you're just feeling lucky, don't replace them. See how much it costs you when they fail somewhere on the road.
If they are that prone to failure, why are we buying the OEM ones.
Because
all hoses will fail after a number of years, OEM or aftermarket.
Sheesh...
if it was so critical, I would think Honda engineers would of included in the maintenance schedule
They DO include them in the maintenance schedule. But they only specify an interval (every 2 years or 30K miles, whichever comes first) for inspecting them, rather than replacing them. This implies that (a) if any cracks or a spongey feel or other anomalies are observed, they should be replaced, and (b) the hoses do, in fact, fail after a period of time and/or use.
So the official advice of those Honda engineers whose advice you're recommending is that your mechanic should take a close look at these hoses at least once every two years. Which is good advice too. You can't always tell that a hose is going to fail by looking and squeezing, but you can catch a lot of them that way.
You will not automatically wreck an engine if your coolant holes fail...
Also absolutely not true. If a cooling system hose fails, the motor overheats. Keep driving it, and yes, you will indeed wreck the engine.
But it's your car, and if you want to save a few hundred bucks by not replacing the hoses, or the timing belt for that matter, and you're happy to take the risk of having to spend many thousands of dollars to replace your engine because you saved a few bucks on hoses, be my guest!
Obviously at some point it's a judgement call but based on the year and mileage of this car I think it's premature.
You are welcome to your opinion, even though it ignores basic facts and makes assumptions that are simply not true. You are also welcome to do whatever you want on your car, because you will pay for the consequences. However, the OP was asking what he can do for his car at this time. I think he would be foolish NOT to replace the hoses. I also think he would be foolish to follow the advice of someone who clearly doesn't know what he's talking about and doesn't understand the consequences of not doing the work involved (and won't be paying any of the costs of those consequences). If the OP has any doubts, he should ask his mechanic about the costs of replacing the cooling system hoses and their chances of failing, and follow his advice (especially if the mechanic has serviced a lot of NSXs over the years and is familiar with the problems that commonly occur on them).
