Thump Sound when starting cold engine
#1
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Thump Sound when starting cold engine
For last couple of days the car is making a Thump sound when the engine turns over. then it gone- single thump sound....It only happens in the morning if the car is sitting in the garage overnight. I do not hear it if i park the car at work after 8 hours does not make the same sound.
I also feel it takes a bit tad longer to start the car(again only in the morning)- i thought it was the battery but the battery has been replaced 2 years ago.
i will try to record the sound tomorrow and post it. the car is fine once started no funny sounds or anything. Its a 2011 with 71k miles on it.
I also feel it takes a bit tad longer to start the car(again only in the morning)- i thought it was the battery but the battery has been replaced 2 years ago.
i will try to record the sound tomorrow and post it. the car is fine once started no funny sounds or anything. Its a 2011 with 71k miles on it.
#2
For last couple of days the car is making a Thump sound when the engine turns over. then it gone- single thump sound....It only happens in the morning if the car is sitting in the garage overnight. I do not hear it if i park the car at work after 8 hours does not make the same sound.
I also feel it takes a bit tad longer to start the car(again only in the morning)- i thought it was the battery but the battery has been replaced 2 years ago.
i will try to record the sound tomorrow and post it. the car is fine once started no funny sounds or anything. Its a 2011 with 71k miles on it.
I also feel it takes a bit tad longer to start the car(again only in the morning)- i thought it was the battery but the battery has been replaced 2 years ago.
i will try to record the sound tomorrow and post it. the car is fine once started no funny sounds or anything. Its a 2011 with 71k miles on it.
#3
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dont think so, its coming right from the front of the car-the car is not on a incline at all.
i had the camera on today but no sound. Does not sound like brake but who knows, i need brakes soon that job i will tackle on the weekend.
I did read about similar noises in different forums (acura)(ford) which they are talking about the ac making that noise. Today when i started car i had the air off yesterday. Today i will leave it on just to see.
i had the camera on today but no sound. Does not sound like brake but who knows, i need brakes soon that job i will tackle on the weekend.
I did read about similar noises in different forums (acura)(ford) which they are talking about the ac making that noise. Today when i started car i had the air off yesterday. Today i will leave it on just to see.
#4
Driver School Candidate
#5
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that's good point might be the auto brakes but i didn't hear any sound today also...its like when i am my camera ready the sound is not coming- its like you know trying to reproduce the problem at the dealership.
The temperature is also higher from last few days might be factor
The temperature is also higher from last few days might be factor
#7
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#9
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#10
Lexus Test Driver
Personally, I think it's just your battery.
Batteries don't last long in this day and age of modern cars and frankly they cause a lot of issues while people search for less obvious problems when the real one one is discounted because they assume it's not bad.
Now of course, I'm just guessing, but I've never seen issues with the starter (at least I can't recall seeing anyone report anything here) and a bad belt wouldn't necessarily cause the slow turnover, but a slowly dying battery will.
I think we all hear that "thump," but a good battery and starter causes the cranking to happen with normal speed. Slow it down and everything, the noise and feel, becomes more pronounced.
If you're willing to gamble on a haunch, replace the battery and see if it goes away, but again, I'm guessing.
Batteries don't last long in this day and age of modern cars and frankly they cause a lot of issues while people search for less obvious problems when the real one one is discounted because they assume it's not bad.
Now of course, I'm just guessing, but I've never seen issues with the starter (at least I can't recall seeing anyone report anything here) and a bad belt wouldn't necessarily cause the slow turnover, but a slowly dying battery will.
I think we all hear that "thump," but a good battery and starter causes the cranking to happen with normal speed. Slow it down and everything, the noise and feel, becomes more pronounced.
If you're willing to gamble on a haunch, replace the battery and see if it goes away, but again, I'm guessing.
#11
Driver School Candidate
Personally, I think it's just your battery.
Batteries don't last long in this day and age of modern cars and frankly they cause a lot of issues while people search for less obvious problems when the real one one is discounted because they assume it's not bad.
Now of course, I'm just guessing, but I've never seen issues with the starter (at least I can't recall seeing anyone report anything here) and a bad belt wouldn't necessarily cause the slow turnover, but a slowly dying battery will.
I think we all hear that "thump," but a good battery and starter causes the cranking to happen with normal speed. Slow it down and everything, the noise and feel, becomes more pronounced.
If you're willing to gamble on a haunch, replace the battery and see if it goes away, but again, I'm guessing.
Batteries don't last long in this day and age of modern cars and frankly they cause a lot of issues while people search for less obvious problems when the real one one is discounted because they assume it's not bad.
Now of course, I'm just guessing, but I've never seen issues with the starter (at least I can't recall seeing anyone report anything here) and a bad belt wouldn't necessarily cause the slow turnover, but a slowly dying battery will.
I think we all hear that "thump," but a good battery and starter causes the cranking to happen with normal speed. Slow it down and everything, the noise and feel, becomes more pronounced.
If you're willing to gamble on a haunch, replace the battery and see if it goes away, but again, I'm guessing.
#12
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12-26-23 12:29 PM