help identifying noise

Sounds like the fan clutch to me, if that's the original clutch with that many miles on it. Park some place quiet and run your hand around the back of the clutch and listen for the sound to change, also check the line between the solenoid and clutch really good. Be sure and check the nipple where the air line connects to the clutch, it could be cracked where it screws into the housing.

 

Here's my help:

Whirrr or hissss: $500

Thunk thunk thunk: $2000

Bang bang bang: $3500

BOOOM cruncha cruncha cruncha: $10,000 +

That any help?

 

I'm surprised you can't feel or see bubbles from where the air sound is coming from. My solenoid has like a little can with slots cut in it. That's where the air comes out.

I don't know what your real problem is but if it was me I would replace the solenoid. I can't imagine they would be that expensive.

Having this break under load could be a huge problem not having the fan kick on. On my truck the clutch fan needs air to turn on. Most other trucks turn on when no air. I wish mine was that way.

 

It does not sound like the solenoid to me unless the noise is from the solenoid. If you're hearing the noise by the fan, it's either the hose/fitting leaking at the fan hub or the fan hub itself leaking. If you are sure that the hose and fittings are not leaking, it's time for a fun hub rebuild or replacement.

If you're mechanically inclined enough to to do it, Kitmasters kits are cheaper and IMO better than a reman Horton (if yours is a Horton). If you have a Kysor, they're easy to swap out the fan clutch for a reman unit, but they don't come with pulley bearings (they just bolt on the front of the pulley). I always recommend playing it safe and replacing the pulley bearings while it's apart.

 

When I did my fan clutch I didn't do the bearings. Shop said they looked good. What's an early warning indicator the hub bearings are starting to go?

 

anyone able to help with my loud rattle coming from front of engine around 14 to 1500 rpm. its an isx motor

 

Sometimes there isn't much warning. An air leak in the hub could be from bearings running hot and melting the seals. A whining noise coming from the hub means shut it down before the fan hits the radiator. To check them, we first leave belt on (engine off), power the solenoid to release the hub and spin the fan, listen for leaks and bearing noise. This only checks the free wheel bearings. Then we unpower the solenoid to lock the clutch and take the belt loose to spin the whole pulley to check those bearings.