Does this seem loud to you? Fan Noise?

[lesgarten]

I've had theis LC since new in 2002.

It has a loud roaring when revving in neutral or accelerating. I don't remember it always being this loud.

The fan clutch "feels" ok to me.

Here is a short clip, but so much normal engine noise I'm not sure it will be apparent.

 

[vipergrhd]

Have someone start the car and rev it while you hold the fan, don't grab it while it's running. Find something to hold it in place and then test it again.
Since you didn't post mileage it's possible that the fan bracket may start to fail also. The fan bracket usually goes out between 200-250k.

 

[lesgarten]

Have someone start the car and rev it while you hold the fan, don't grab it while it's running. Find something to hold it in place and then test it again.
Since you didn't post mileage it's possible that the fan bracket may start to fail also. The fan bracket usually goes out between 200-250k.

I'm at 225K.

I'm not clear on the holding the fan part! You're scaring the crap out of me. I only got 2 hands and I think I need them both! LOL

 

[seanz0rz]

Stick a piece of wood in the fan and hold it while someone starts the truck. The fluid coupling will allow the fan to remain stationary as the belt turns.

At least that's the theory.

When my fan bracket when bad, it sounded like the engine was about to explode.

 

[vipergrhd]

Stick a piece of wood in the fan and hold it while someone starts the truck. The fluid coupling will allow the fan to remain stationary as the belt turns.

At least that's the theory.

When my fan bracket when bad, it sounded like the engine was about to explode.

He beat me to it. Do not use your hand unless you have a spare.
Didn't mean to scare you.

 

[lesgarten]

It sounds like a locked up fan, but the fan doesn't seem to be locked up. Loud roaring, jet engine kinda taking off thing, mainly through the gears and then I don't notice as much at road speed.

By the fan bracket, I would think I would feel it as a bad bearing, right?

I have to say I'm kinda trepidatious to start the engine with a piece of wood in the fan!

I don't want to be a Darwin Award Nominee or Winner...

 

[vipergrhd]

Maybe there is nothing wrong, and what you are hearing is just a normal fan noise disengaging after a few seconds.

 

[lesgarten]

Maybe there is nothing wrong, and what you are hearing is just a normal fan noise disengaging after a few seconds.

I've been driving it for 225,000 miles and it's getting my attention. I'm almost 70, so my hearing is not improving in the last 24 years I don't think.

Something has me thinking it's louder.

 

[seanz0rz]

I've been driving it for 225,000 miles and it's getting my attention. I'm almost 70, so my hearing is not improving in the last 24 years I don't think.

Something has me thinking it's louder.

Worth taking to a mechanic then. I always listen for strange noises and general changes, it's saved me from some costly repairs in the past. Trust the intuition and get it checked out.

 

[Dirt J]

Bad pulley bearings will roar and change pitch with RPMs. With it running, spray some brake cleaner at each pulley bearing to see if one quiets down.

 

[vipergrhd]

Have you taken it to a shop @lesgarten ?

 

[2001LC]

Do not hold fan with hand or stick while starting.
Turn by hand engine off. It will have a little resistance at first. It should not just free spine, but will spin easier with each rotation by hand.

When staring cold, you'll hear a turbo sound, since clutch is engaged. Within about 2 min, sound will die down. Now with a news paper or paper sack rolled up. See if you can stop fan blade, by gently feed paper into blade. Yes! Good. Now after warm up when engine get very hot. Turbo sound should return. At which point you can not stop blade with paper.

Next or first, test fan bracket and all pulley bearings. Including AC clutch. Also be keen, to vane pump and alternator sounds.

 

[lesgarten]

Have you taken it to a shop @lesgarten ?

Not yet, I usually approach these things myself at first.

 

[lesgarten]

Do not hold fan with hand or stick while starting.
Turn by hand engine off. It will have a little resistance at first. It should not just free spine, but will spin easier with each rotation by hand.

When staring cold, you'll hear a turbo sound, since clutch is engaged. Within about 2 min, sound will die down. Now with a news paper or paper sack rolled up. See if you can stop fan blade, by gently feed paper into blade. Yes! Good. Now after warm up when engine get very hot. Turbo sound should return. At which point you can not stop blade with paper.

Next or first, test fan bracket and all pulley bearings. Including AC clutch. Also be keen, to vane pump and alternator sounds.

Interesting! Thanks!