Aight, so my 5 speed D16Z6 has been running great for quite some time. Shifts like a champ. But I noticed that when it's idling, if I punch in the clutch, the idle goes up a little and it gets a little quieter (which I attribute to the engine not spinning the transmission anymore.) But when I let the clutch back out a soft whirring noise starts up, and is audible with the door open and the hood open. When I got my oil changed in March the dude said I needed new transmission oil, but I dismissed it as a sales gimmick (it was a jiffy lube). But now I'm thinking I do. Can anybody tell me if this is a difficult task in relation to oil changes? I know how to change my own oil, and now I have a pneumatic jack and some jack stands are on the way. I've done some reading and it was kinda vague, but it doesn't seem terribly hard, except for dealing with seized bolts. Anybody with experience? Cheers.

 

Mine does roughly the same, except the idle doesn't move, but I read somewhere on here that the noise with the clutch pedal up(your foot off) could be the Input Shaft Bearing, but mine is loud since you can here it over the idle on the inside. Wish I could offer more help with this, but I haven't been doing this long. (still in Highschool learning auto)

As for the trans oil change, I haven't done it on my Sol yet, but I've done a couple on some other cars in shop. It is pretty easy in my experience except for those bolts. ( I swear other shops purposely neglect antiseize to screw with us.)

 

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/default-%5Bfaq%5D-how-change-your-civic-manual-transmission-fluid-1687986/

 

Your throwout(clutch) bearing is the one making noise when pedal is out but is quiet with the pedal in. This is usually an indication that you "ride" the clutch or you have a low end clutch kit.

 

I have only had the car about 4 months but I know for a fact that I don't ride the clutch. The only time my foot touches it is when I'm launching or when I'm shifting gears. But the car has two previous owners...

 

Ya, then one of them rode the clutch or its just a "worn" clutch kit. I'm sure someone will agree

 

The noise is likely coming from a transmission main bearing, typically the input shaft bearing. If the noise is not loud, then it may be fine. Just drain the MTF and refill with Honda MTF.

The throw out bearing would only make noise with the clutch pedal pressed down.

 

Not necessarily true. Mine made noise with the clutch pedal out, then went away when I pushed the pedal in. I replaced the throwout bearing, the flywheel pilot bearing, the clutch, and the pressure plate. Put everything back together and the noise is still there, from what I have read I'm dealing with a bearing in the tranny itself.

Don't make the same mistake I did 2 days ago, it sucks to get everything back together again and it still be making the same noise. :/

 

Except that you know you have a brand spankin new clutch, pressure plate, throwout bearing, and flywheel bearing.

 

Oh yeah and rear main seal, I replaced that too...specifically because I didn't want to take the trans off again in the future, lol. The peace of mind is slightly lessened, knowing that if I HADN'T replaced all that, I STILL have a perfect opportunity to, since everything is coming off again. lol

 

Thanks for clearing it up, guys.
Sorry, OP. I had the symptoms backwards apparently. Looks like it is your trans. Which kinda sucks, because now you have to split the case to change that bearing. Its easy to get apart, just tricky to line up and pop the top back on it. Best of luck

 

okay, so i've been driving it for a year and a half now on a noisy input shaft bearing. it's definitely louder than it used to be. Is there danger in continuing to drive on a noisy input shaft bearing? the noise is loud enough to annoy me.

 

The last two transmissions I overhauled, the ISBs literally came out in chunks. No other damage to the transmission. That said, it would put undue stress on the rest of your drivetrain, and cause another bearing to **** itself, which may destroy the transmission, or may cascade to another bearing that'll destroy things. You see where I'm going with this? It's an entire system working together. When one part fails, it puts more stress on the other parts to carry the weight of the one.

 

i dont have the resources to attempt to replace it myself, just out of curiousity, is it an expensive job?

 

yes, if done by a shop. isb goes, it will take the rest of your trans with it. start looking for a new trans, will be cheaper if you can't diy the isb replacement. might want to take it easy with the "launching"