My good friend's discovery 2 has started to make a new bad sound in the engine compartment today. Due to tough personal circumstances, I'm trying to support his family and help make sure their car keeps running. Any chance the landroverforums hive mind could help point me in the right direction for what this sound may be?

https://youtu.be/TYsmKGoiaZo

We're going to start off by removing the serpentine belt to see if it's being cause by one of the accessories (A/C, alternator, power steering pump, etc.). Hopefully it's just a simple part interference and not a more significant valve issue or anything like that.

Thanks for any support!

 

Check around the fan, sounds like something hitting the blades

 

No speakers on my computer to listen to it, but if it's something hitting the fan it might be the fan shroud. About a year and a half ago there was a rash of people coming through with fans exploding and taking out hoses, power steering pump, radiators, etc. Make sure all the little mounting bits are still there that hold the top half of the shroud and try not to drive it till it gets fixed. Exploding fans cause a lot of other damage. That's why I went electric.

 

I have to use zip ties since the bolts are long gone. I know that sound lol

 

You can see the fan has already chewed through the shroud.
.....

 

That or it's the first fan shroud with an inspection window I've ever seen.

Check to make sure it's mounted properly and securely. Also check the fan to make sure there isn't some wobble there like a water pump bearing going out.

 

I didn't watch the video, but if your fan is hitting the shroud, you more than likely have bad/broken motor mounts. Check those too

 

Yep we have contact.

 

I had an episode where the fan is hitting the shroud but totally different and hardly you will hear the fan touching it until all the plastic get chewed. I think its more of a lifter noise. Just go get a cheap stethoscope from autozone to check the location where the actual sound is coming from.

 

Thanks everyone so much for the help. Super appreciated. I'm really glad to say that I don't think it's a valve issue! Phew. Super relieved. Would have been a very bad time for that.

Hahaha ArmyRover+OverRover : D Yeah, clearly there was so interference here. I don't know if that's old or new, but what I do know is...

I noticed that the belt in my friend's rover was flopping pretty crazily between the tensioner and the alternator. Sure enough, the tensioner seems to be bottomed out and the belt was quite loose.

When I swapped it for a spare belt I had (always keep a spare handy!), the sound went away for the most part. Problem solved! Kind of. The belt is still super loose...

Why is my rover's belt so much tighter than my friend's? I swapped belts between the rovers and mine was still tight and his still loose.

So, either he has a smaller than average pulley () somewhere, or maybe somehow the spacing between the pulleys is wrong?

Comparing his pulleys to mine, though, they all seemed like the same sizes so I'm at a loss. Oh and I checked the fan and some other pulleys bearings - all seem securely mounted (not being pulled off-center)

I know that for our non-ACE discos, there is a small idler and a big idler. Maybe I can swap in a big idler for his small one to take up more belt length?

Or maybe instead of our Dayco 5070923 belt (92.32" effective length) I could get a Dayco 5070905 (90.55" effective length)? Not sure if this would be too short or if the tensioner has enough travel.

Thoughts?