Ticking nose or just ticking bomb?

[Brian McK]

Definitely fan OR a hidden metronome somewhere in your engine bay area.

 

[Jermgallo]

The click was coming from the fan assembly so I replaced it. The same exact sound yours is making and at first I thought it was a timing guide slapping.

Sweet well sounds like a quick and easy fix then. Thank you again


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[Red Landie]

I also recorded the exact same sound coming from my LR4. And like yours, it occurred when the engine was just beginning to warm up. The dealer mechanic said it was *not* the timing chain, which has been a documented problem with this engine. According to the mechanic (extremely knowledgeable master mechanic), he said it was the fan clutch. This concurs with your other replies. Obviously a fan clutch is much easier to replace than the timing chain. A bit of good news, I suppose.

 

[4csrehab]

The LR4 is a noisy engine even when new so it's hard to diagnose issues over the loud fuel injectors.

I will tell you that if your alternator is making that noise, the valve cover gasket above it may be leaking and dripping oil into the alternator. That happened on my LR4.

 

[4csrehab]

Most likely the fan clutch dont get cheap one.had to replace twice.

 

[wthammett]

Wait, what? I have the same exact tic-toc sound upon start up only sometimes, yes appears to be more prevalent during the winter. I hear it for 10 sec or so then it goes away. For 4 years now I’ve convinced myself it was the chain tensioners and now you guys tell me it’s something to do with the fan? If it were the fan why would it be so wildly intermittent over a period of 4 years - strange but I appreciate the feedback for sure.

 

[ktm525]

If it sounds like a metronome on about a 1 second timing then it is not your timing chain.

 

[ryanjl]

If it sounds like a metronome on about a 1 second timing then it is not your timing chain.

That, and when you pop the hood the fan noise clearly sounds external and not like it's coming from inside the engine.

 

[BznLR4]

My 2011 LR4 has been giving me what seems to be the same noise for 6+ years with no further problems. Some years ago I searched forums and convinced myself that it was just a feature. When I first noticed it I was sure it was either a failing water pump or timing chain...but after years of nothing getting worse, I'm convinced it is just an LR4 feature.

On cold mornings in Bozeman, one just learns to expect certain noises...the crunch of cold snow, and ticking from my LR4.

 

[ktm525]

The 5.0L engine is noisy (typical for an early gen DI engine). It is the first thing I notice going from the 4.4 LR3 to the LR4.