AC Tensioner Part Trick
▲ 7 r/crx+1 crossposts

AC Tensioner Part Trick

Hey guys, I'm posting here because I pulled parts of the miracle for my CRX and I just want traceability for somebody in the future if they encounter the same problem.

My 90Si came with factory air. I had to replace my compressor. Fine. Near as I could tell I was an idiot and when I adjusted my belt tension I didn't tighten the 17 mm nut on the tensioner pulley.

Anyway after a week or so of driving, I heard a loud noise. My belt AC had broken and there was no tensioner hardware at all.

I live near a large city but can't find these cars in the junk yard anymore. These are the same parts for the sedan, wagon, or the CRX but nothing in this generation seems to be in the junk yard, hardly ever.

So on the photo I lost five parts:

22 - tensioner pulley. This is easy to get aftermarket

23 Honda 38944-PM3-000 collar no longer made by Honda. I could not find this anywhere.

24 Honda 38945-PM3-000 bearing dust cover - ordered through Honda

26 Honda 90017-PE0-000 10 mm washer - ordered through Honda

29 Honda 90058-PG6-000 Lock nut - ordered through Honda

The really hard part was finding this collar. Honda doesn't make it and nobody has it available after market. There was a collar available for the next generation EG car. It was part number 38944-PO2-000

This works! The same dimensions as the old part except the wide part of the collar is 26 mm instead of 24 mm. A little hard to explain, but it wouldn't recess into the bearing but this was fine. If I had to, I could have put this in to a drill and filed down the diameter to be identical to the old collar.

Well that's it. I first bought an EF Honda Civic in 2007. Man, the junkyards were full of these cars! It was so easy to get parts like this. Now, specialty parts are getting almost impossible to find.

u/Kitchen-Chemistry277 — 3 days ago

Tektronix MSO5204B Scope Repair Top

Hi, I'm doing something a little bit weird here and posting about a successful repair I made on my oscilloscope in the hopes that somebody in the future might search for this model or part number needing the same advice.

This scope was completely dead. The fault was located to its power supply. It is a self-contained unit made by Artesyn. Part number NLP250N-99S12N01J. This is a 12-volt, 20-amp supply. It was impossible to find a replacement.

I found that Artesyn made a nearly identical supply: part number NLP250N-96S12N01J. In 2026 these are still available from Digikey for about $220. I bought one for $77 new old stock on eBay. The original part number is for a medical-grade supply that has extremely low leakage from the AC mains to the 12 V out. This part number is a more standard industrial supply with a less aggressive leakage standard.

In switching from the old to the new supply, a 9-pin control connector had to be re-soldered. The other thing I'd like to note is that next to the control connector is a small jumper labelled JP1. The new supply needed to have the jumper bar for JP1 pulled in order for the supply to power down properly when the scope is not in use. ( The original supply had solder pads for the connector but nothing was installed. )

Anyway that's it. These two tricks are what brought this scope back from the dead.

u/Kitchen-Chemistry277 — 24 days ago

NASTY black water splashed in my eye...

This is a "What would you do?" post.

Like most of you, I have KC. And I wear scleral lenses. Its Sunday night and I decided to smoke some salmon.

I have a bucket that I use for soaking wood so this wood smokes and doesn't burn. I filled it up this morning and smells like rotting wood and it is black.

Tonight, when I first jostled this bucket, a bunch of mosquitoes flew out. So today they've been laying eggs in this nasty water. Gross.

See how the edge of the buckets broken? Well, I tried lifting it up by the edge and it got about 6 in high and that piece broke and the bucket fell on the ground and backsplashed a fountain into my right eye.

So here's what I did. I stopped everything, went in the house, washed my hands, poured a sink of warm tap water and splashed my face really well..

Then I took out my contact and cleaned it. Next I took my cheap saline and irrigated the living devil out of my eye.

I'm going to wait several hours or overnight to put my contact back in.

I have antibiotics laying around, but I feel like maybe it's overreacting or a misuse of those antibiotics to put the drops in just in case.

I'm figuring at this point the chances of me having a problem are low. and morning will tell me a lot.

What would you have done?

Anything different?

Any good tips?

I didn't feel like it was worth calling my doc.

:-/

Dan

u/Kitchen-Chemistry277 — 25 days ago
🔥 Hot ▲ 9.6k r/Keratoconus+1 crossposts

Megalocornea, a rare eye condition in which the cornea (the clear front surface of the eye) is abnormally large, typically more than 13 mm in diameter,while the eye pressure is usually normal.

u/AlbinaHumblewhore — 2 months ago
▲ 1 r/batteries+1 crossposts

10 Second Battery Backup for a Solid State Hard Drive

Hi, I have been looking through web sites and think I'm at a dead end.

I am working on a solid state hard drive. I need to supply like 25 Watts for only 10 seconds or so. (Think power failure and this drive has to move a bunch of data from temporary storage to permanent storage).

Right now, we use capacitors for this. They can supply 25 Watts for about 30 msec. Management wants a lot longer.

So I need a small battery (like 20mm x 30mm x 5mm) that can output Amps. So far, the best I can find is only 500 mA.

Is there any battery technology out there that can supply higher currents for just a short time?
thanks!

Dan

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u/Kitchen-Chemistry277 — 3 months ago
▲ 2 r/crx

Tire brands & maybe sizes for my car.

Hi, I've got a 1991 CRX. It has 175/65 R14s on it. I've run Michelins on this car like forever and I love them.

Now it's time for new tires and Michelin doesn't make 14" tires anymore. Or so I'm told.

Are there any tricks to getting great tires for my car? What brands would be comparable to the Michelin's? Could I bump up to a 185s or something like that to widen my search? Any help would be really appreciated.

reddit.com
u/Kitchen-Chemistry277 — 3 months ago