Nose identification: solenoid click and then slight whine

[Roger Dunning]

TJ 2005 I was sat in traffic and noticed and regular "solenoid click" followed by a light whining for about 5 seconds then off. Then the same again. Repeating.

No other issues with car at all.

Video -

 

[Wildman]

TJ 2005 I was sat in traffic and noticed and regular "solenoid click" followed by a light whining for about 5 seconds then off. Then the same again. Repeating.

No other issues with car at all.

video is too big for upload. Let me know if it would help me to email you video.

To post a video you need to load it onto something like YouTube.

 

[Wildman]

As far as your noise? Could be something to do with the emissions system? Since it's a Export model I'm not sure if there is anything else that might be different.

 

[g.hayduke]

Was your A/C on? Sounds like the same behavior as the compressor cycling on and off.

 

[Wildman]

Was your A/C on? Sounds like the same behavior as the compressor cycling on and off.

Good catch... A/C on or defrost on.

 

[Wildman]

Was your A/C on? Sounds like the same behavior as the compressor cycling on and off.

Good catch... A/C on or defrost on.

 

[Roger Dunning]

To post a video you need to load it onto something like YouTube.

Thanks. Video now added

 

[g.hayduke]

Sounds like the compressor kicking on.

Was the A/C or defrost on?

If it's the compressor, you should see the compressor clutch engage and disengage in synch with the sound.

 

[Roger Dunning]

Sounds like the compressor kicking on.

Was the A/C or defrost on?

If it's the compressor, you should see the compressor clutch engage and disengage in synch with the sound.

AC was not on but I will check that
I don't know what the compressor looks like but I'll search it.

 

[aston4]

It's the A/C compressor.

 

[Roger Dunning]

Thanks Aston. Is it anything I need to be aware of it to do anything about? AC seems to be working fine

 

[aston4]

Nah. Ignore it. There's no sound insulation in these things, everything is loud. If the AC ever goes out, deal with it then.

 

[Rickyd]

AC was not on but I will check that
I don't know what the compressor looks like but I'll search it.

It is on the left side under the power steering pump. The center part will only spin when it's clutch engages. It cycles depending on ac system pressure. Start the jeep,look at it and you'll see what I mean

 

[aston4]

Wow, a TJ in England! Thats fab!!!! I used to love English cars, still have one, made long ago in Coventry. TJ is just like 60s English cars even leaks oil

 

[tnjeepguy]

Did the nose look like this ??

 

[Roger Dunning]

Did the nose look like this ??

View attachment 628895

Ha haa! Me and my lack of spell checking.

 

[Roger Dunning]

Wow, a TJ in England! Thats fab!!!! I used to love English cars, still have one, made long ago in Coventry. TJ is just like 60s English cars even leaks oil

Made in USA, imported to Japan and then through to UK last year!

 

[Roger Dunning]

It is on the left side under the power steering pump. The center part will only spin when it's clutch engages. It cycles depending on ac system pressure. Start the jeep,look at it and you'll see what I mean

Great I'll have a look. Interestingly when I checked the pressure on the AC on a little guage I have it says it's poss too high. Honestly I don't know a huge amount about AC.

 

[g.hayduke]

Great I'll have a look. Interestingly when I checked the pressure on the AC on a little guage I have it says it's poss too high. Honestly I don't know a huge amount about AC.

The compressor cycles under normal operation. There is a high pressure switch on the high side and a low pressure switch on the low side. If pressure gets too high, it shuts off until it drops below the threshold. If it's too low on the low side, it shuts off to prevent starving the compressor. The low pressure switch is the one that saves the compressor if you have a leak and lose too much refrigerant.

The whole system is described in detail in the FSM that you can access on this site.

 

[aston4]

It's supposed to cycle on and off, depending on ambient temperature and engine speed. Do English cars still not have A/C? Well I guess there aren't many English cars any more. Morgan maybe. Sigh...