HELP: rattling noise when starting up the car
#1
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HELP: rattling noise when starting up the car
hey guys,
i have a question...when i start up my LS460, i hear some rattling noise comming from the engine..sounds like rocks/sand? im not sure but it only happens when i start up the car..after that..the car is completely quiet and drives perfectly fine...any input would help.
thanks!
i have a question...when i start up my LS460, i hear some rattling noise comming from the engine..sounds like rocks/sand? im not sure but it only happens when i start up the car..after that..the car is completely quiet and drives perfectly fine...any input would help.
thanks!
#2
Lexus Test Driver
hey guys,
i have a question...when i start up my LS460, i hear some rattling noise comming from the engine..sounds like rocks/sand? im not sure but it only happens when i start up the car..after that..the car is completely quiet and drives perfectly fine...any input would help.
thanks!
i have a question...when i start up my LS460, i hear some rattling noise comming from the engine..sounds like rocks/sand? im not sure but it only happens when i start up the car..after that..the car is completely quiet and drives perfectly fine...any input would help.
thanks!
This may not be the case for you, but shortly after I purchased my car, I didn't hear a rattle on start-up, but did hear a faint occasional rattling sound while driving.
It turned out to be 2 engine cover rivets; 1 completely out bouncing around beneath the hood, the other was loose within its seated position.
Once that was taken care of the rattling was gone.
#3
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Have you tried having someone start the vehicle while you have the hood opened and engine covers off, which would enable you to have a closer listening point to perhaps better observe the sound(s) your hearing?
This may not be the case for you, but shortly after I purchased my car, I didn't hear a rattle on start-up, but did hear a faint occasional rattling sound while driving.
It turned out to be 2 engine cover rivets; 1 completely out bouncing around beneath the hood, the other was loose within its seated position.
Once that was taken care of the rattling was gone.
This may not be the case for you, but shortly after I purchased my car, I didn't hear a rattle on start-up, but did hear a faint occasional rattling sound while driving.
It turned out to be 2 engine cover rivets; 1 completely out bouncing around beneath the hood, the other was loose within its seated position.
Once that was taken care of the rattling was gone.
#4
If it's a faint rough sound that goes away after about a minute which is more noticeable when the car is cold then I would not worry about it. All of the LS460s that I have driven including one that had only 14k miles sounded a little rough on start up and quickly goes away. I believe there is a little metal to metal contact on startup before the oil lubricates possibly because of the tight tolerances and thin oil that drains into the pan leaving less residual oil between the parts.
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If it's a faint rough sound that goes away after about a minute which is more noticeable when the car is cold then I would not worry about it. All of the LS460s that I have driven including one that had only 14k miles sounded a little rough on start up and quickly goes away. I believe there is a little metal to metal contact on startup before the oil lubricates possibly because of the tight tolerances and thin oil that drains into the pan leaving less residual oil between the parts.
#6
Do you notice the same sound if the engine is still warm and the car restarted.
#7
Pole Position
It's probably the rockers hitting the hydraulic cam followers, sometimes it takes a minute for the oil to fill them up and you get a little valve train noise for a few seconds. I get it once in a blue moon.
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#9
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hmm, does it sound like a few grains of pebbles or sand in a tin can that rattles for like 2-3 seconds?
#10
#11
Lexus Test Driver
May as well take a good look at the water pump while your there.
#12
Great idea to spin all of the pulleys for noise and for play.
#13
Lexus Test Driver
#14
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Hello MHA002
You can try using a quality 5w30 weight oil. My personal favorite is Royal Purple. I haven't tried Mobil One's FullSyn 0w30, but that would be my second choice. Please, post the results after your chosen adjustments/checks.
You can try using a quality 5w30 weight oil. My personal favorite is Royal Purple. I haven't tried Mobil One's FullSyn 0w30, but that would be my second choice. Please, post the results after your chosen adjustments/checks.
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