2012 HSE 5.0 V8 Engine Rattle

[Androomantoo]

Well after spending most of the day replacing the rear crossover pipe, the y-pipe, thermostat housing, water pump, oil cooler pipe, and intake manifold everything is perfect.

It was the variable intake runner butterflies in the original intake. The used intake from a 2013 RRS cured the knock/rattle completely.

I can only surmise one of the butterflies broke free from the shaft and would rattle when they were closed and quiet down when open.

Cutting the intake open for a deep inspection will come later when I get some more free time. That intake is essentially trash now due to the variable runner system being bonded to the rear of the intake. I might as well cut it open and rummage around.

Woooooohoooooo!!!!!!!

Now to start saving for the timing chain overhaul this fall…

 

[f1racer328]

Good to hear. Keep us updated! My car has some intake noise that I've been curious about for a while, and sounds somewhat similar to your video, but not as loud. Maybe I'll do some investigating in the future.

 

[tmbipa57]

Here is the LR technical bulletin for the "rattle/ click" noise and it seems they must provide the repair at no cost. My LR RR HSE naturally aspirated 5.0 has it with only 123k

 

[itsaguything]

Yes… in 2015, when the vehicle was on warranty…. Which it isn’t now.

 

[ktm525]

Yes… in 2015, when the vehicle was on warranty…. Which it isn’t now.

Damn I was going to march in there and point at my 2010 and demand they fix it for free.

 

[Androomantoo]

That TSB is also for timing chain components rattling, not a broken intake flap rattling.

Thankfully the problem doesn't seem very common at all.

 

[jlach993]

Damn I was going to march in there and point at my 2010 and demand they fix it for free.

Lolllllll

 

[LR4 2011]

If the engine quiets under a load then the valves have adjusted back as far as possible and the slop in chain is minimized. The tensioner arms are probably worn deep and allows chain to rattle under light loads.