Maintenance Journey (1993 Berlina Black): What am I missing?

[Ready2RetireAt21]

Howdy folks, so I'm about to undergo a TB change and wanted some feedback on what I'm missing:

Vehicle: 1993 NSX; ~121,500miles. The last TB was done at 95,506 which was 12 years ago.

Currently, I've purchased and plan the following:

1. SOS 90k Mile Service kit - OEM parts
   • Timing Belt
   • Water pump w/housing and cover
   • valve cover gaskets
   • tube seals
   • washers, head cover
   • oil filter
   • air filter
   • alternator & AC belts
2. SOS VTEC Seal Kit - OEM parts
   • spool valve filter assembly
   • solenoid base filter assembly
   • oil pressure switch o-rings
   • oil pressure sensor o-ring
3. Oil Pan & Dipstick - OEM parts
   • oil pan gasket
   • dipstick o-ring
4. OEM crankshaft pulley
5. Coolant hose set
6. Koyo radiator
7. Install Cedar Ridge timing belt shield
8. Install OEM rear main transmission seal
9. Install OEM tensioner
10. Install OEM idler
11. Install OEM crank seal

What else would the community recommend? I'm debating on LMA's right now.

 

[acuhon]

I would do LMA for sure, cam plugs and seals, oil pan baffle, clutch master and slave cylinder, clean injectors and new fuel filter.

 

[bogle]

Since you’ll have the cooling system apart, you could also do the thermostat, all the water temp sensors, and the front pipe with the updated bleeder (Not sure what year they added it). Maybe even the coolant tank if yours is yellowed.

 

[mtung]

I'd also get your VVIS butterfly screws locktite - worth a search for all the near misses and horror stories!

It likely also hasn't had the valves adjusted. Might be worth it for worry free operation for many many miles

*Edit love the screenname btw!

 

[Yinzer]

10. Install OEM idler

I don't recognize this, does anyone know the part # for this. 1993 MT. Thanks.

 

[Ready2RetireAt21]

well.....i did a horrible job at posting this journey...but I do have a bunch of videos, spreadsheets, PN#'s, etc. I dropped the engine over Christmas 2023, took 6 weeks and replaced a bunch of, "while the engines out" parts.

In general, my SOW was:
1. Timing belt stuff
2. Coolant hoses
3. new Radiator
4. new clutch/flywheel
5. new exhaust/headers/hi-flow cat
6. new random relays
7. probably 40 o-rings/gaskets
8. IAB delete
9. New AC compressor (long story, but I have a brand new OEM one available as spare now)
10. LMA's (kind of apprehensive about pulling out the rocker shaft...yikes)
11. axle boot kits/random bolts.

The theme was as much OEM as possible, except for the exhaust parts. I came in around $11k in parts....some shipped from Japan.

 

[Ready2RetireAt21]

I'd also get your VVIS butterfly screws locktite - worth a search for all the near misses and horror stories!

It likely also hasn't had the valves adjusted. Might be worth it for worry free operation for many many miles

*Edit love the screenname btw!

Yeah....I guess not needed now since I did the IAB delete. Although, my screws had almost no play. I took videos of that as well. Now I'm curious as to how often this actually occurs.

Also, I'm partially retired from corporate finally (late 40's) a bit late than I should have.....lol

 

[Ready2RetireAt21]

I don't recognize this, does anyone know the part # for this. 1993 MT. Thanks.

let me break out the spreadsheet.....and thanks for getting me back into the forums.

 

[Ready2RetireAt21]

Since you’ll have the cooling system apart, you could also do the thermostat, all the water temp sensors, and the front pipe with the updated bleeder (Not sure what year they added it). Maybe even the coolant tank if yours is yellowed.

doh!!! I ended up doing the thermostat....old temp sensor, and old bleeder. I just followed the bleeding instructions in the FSM.....but man, it took a ton of time. It also didn't help that I had to pull the intake manifold back out after I realized that I improperly installed one of the o-rings on the hard coolant pipe under the manifold. That sucked.....

 

[Ready2RetireAt21]

I would do LMA for sure, cam plugs and seals, oil pan baffle, clutch master and slave cylinder, clean injectors and new fuel filter.

all done except for the oil pan baffle.....the slave cylinder was unexpected replacement (Ebay OEM, shipped from Japan). I had planned on getting a new oil pan, but not so sure now since it's going to be tricky to replace it with the Pride header causing some clearance issues.

 

[Yinzer]

let me break out the spreadsheet.....and thanks for getting me back into the forums.

Thanks! I'm filling my Basket at oemacuraparts and am ready to place an order for a TB/WP and other mechanical freshening.

Yeah....I guess not needed now since I did the IAB delete. Although, my screws had almost no play. I took videos of that as well. Now I'm curious as to how often this actually occurs.

Exactly, I'm curious too! Does anyone know if the VVIS issue is a random time bomb that may or may not become an issue for every engine, where it would be wise to check them occasionally, or is there anything about the issue that would make more along the lines of "check it once then done" like the transmission snap ring bore (as in, if they haven't come loose by now they won't).

 

[Honcho]

Thanks! I'm filling my Basket at oemacuraparts and am ready to place an order for a TB/WP and other mechanical freshening.



Exactly, I'm curious too! Does anyone know if the VVIS issue is a random time bomb that may or may not become an issue for every engine, where it would be wise to check them occasionally, or is there anything about the issue that would make more along the lines of "check it once then done" like the transmission snap ring bore (as in, if they haven't come loose by now they won't).

I recommend checking them with every oil change. They make cheap inspection cameras now that plug right into your phone.