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2006-2009 Range Rover MkIII / L322
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Hello after much googling and searching to no avail. i cant seem to figure out my noise. ill be on the highway or slowing from above 50 and ill get a boooop noise as if i ran over grooved highway but im not. it emanates from under the steering column. i cant figure it out. i thought the brake booster vacuum gasket was intermittently coming loose and making a flapping noise but its very tight and not loose. any ideas? AND there is a pulsing noise coming from an unknown assembly on the drivers side of the engine it has two circular shapes on top and its tucked behind a heat shield since its so low in the engine bay. what is this im talking about. when its making the noise (warmed up) its a pulse about .5 sec on and off. i can hear it from the cabin and when touched you can feel it clicking and vibrating. any ideas on that too? you can feel both noises under thae steering wheel they may be related i dont know. also i have 170k miles can i repace tappets without removing the engine? i have a massive tick. im thinking im gonna rebuild it soon. any help would be appreciated. <img src="http://www.rangerovers.net/forum/attachment.php?attachmentid=40393&stc=1" attachmentid="40393" alt="" id="vbattach_40393" class="previewthumb">
 

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2002-2005 Range Rover MkIII / L322
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494 Posts
Year and variant will help
 

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The boop I'm not sure about, but try a couple things to see if you can change it. Does it still make the noise with AC switched off? If you shift to neutral when slowing down?

The Pulsing noise is coming from the heater control valve. These do fail, and yours may be on the way out, but they do normally make a slight amount of noise. See if the noise changes based on your HVAC settings.

Yes, lifters can be replaced in the vehicle, but not a common failure at all on the AJV8, as they are not hydraulic. Can you go into more detail about the tapping?
 

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As far as the motor tick, the exhaust manifold bolts on the back two cyls are known to work loose and sound tickey. Might look at that.
 

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2006-2009 Range Rover MkIII / L322
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Discussion Starter #6
The boop I'm not sure about, but try a couple things to see if you can change it. Does it still make the noise with AC switched off? If you shift to neutral when slowing down?

The Pulsing noise is coming from the heater control valve. These do fail, and yours may be on the way out, but they do normally make a slight amount of noise. See if the noise changes based on your HVAC settings.

Yes, lifters can be replaced in the vehicle, but not a common failure at all on the AJV8, as they are not hydraulic. Can you go into more detail about the tapping?



I'll try to omit the hvac system and see if that noise goes away. And I tried neutral idle down from highway speeds and still makes noise. Think that heater valve may be causing it? I'll try the hvac then go from there.
And the tick comes from the passenger side below the pcv" ? Valve. I've tried thicker oil weights up to vr1 racing oil no noise change. The nose will go away intermittently but sometimes gets especially loud with high under hood temps. Ie traffic jams etc...

I'll def look at the exhaust manifold bolts. That may be the ticket there. That makes sense. And I've heard the aj is a great motor with no complaints of valve tick. But I don't know if mine has been overheated ever in its life. Any way to tell?

Thanks for the help! Kyle and roverguy7
 
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