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#3227904 - 12/26/13 12:03 AM Engine sounds when revving
sgvaibhav Offline


Registered: 12/16/12
Posts: 94
Loc: Dubai, UAE, Middle East
Me and my friend drove through flooded streets due to rains...

The water levels was considerably high, above bumpers...

My friend is complaining of engine noise from his car, however it has been 2 days since rainfall. [he noticed this yesterday, because he didnt drive at all after rains]

The car sounds like its old when he revs.

What can it be?

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#3227906 - 12/26/13 12:08 AM Re: Engine sounds when revving [Re: sgvaibhav]
TallPaul Offline


Registered: 10/22/03
Posts: 12915
Loc: By Detroit
Look at the oil. If water got in the oil it would cause problems for the engine. Also water may have gone into the transmission or axles.
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#3227915 - 12/26/13 12:23 AM Re: Engine sounds when revving [Re: sgvaibhav]
sgvaibhav Offline


Registered: 12/16/12
Posts: 94
Loc: Dubai, UAE, Middle East
Chances of water in cylinder/piston rings?

How to detect that?

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#3227920 - 12/26/13 12:41 AM Re: Engine sounds when revving [Re: sgvaibhav]
ClutchDisc Offline


Registered: 11/23/12
Posts: 1098
Loc: Detroit area
Originally Posted By: sgvaibhav
The car sounds like its old when he revs.

What's a car sound like when it's old?
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#3227924 - 12/26/13 12:50 AM Re: Engine sounds when revving [Re: ClutchDisc]
crazyoildude Offline


Registered: 07/23/08
Posts: 5361
Loc: new jersey
thats what i was thinking... can you post the sound?

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#3227937 - 12/26/13 01:17 AM Re: Engine sounds when revving [Re: sgvaibhav]
actionstan Offline


Registered: 05/22/13
Posts: 458
Loc: Ohio
If the car sounds like its old, I imagine it just yells at kids to "get off my lawn!"


My car is like 15 years old, it sounds like a normal engine to me.. Is the engine knocking or making a clicking soud? What kind of car and what year? It is possible if water was deep enough it got into the crankcase.. If he thinks this is the case... I wouldn't drive it and I'd change the oil ASAP.

I don't think its good practice to drive in water bumper high unless you absolutely have too..


Edited by actionstan (12/26/13 01:22 AM)
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#3227941 - 12/26/13 01:25 AM Re: Engine sounds when revving [Re: sgvaibhav]
bigjl Offline


Registered: 09/06/12
Posts: 1699
Loc: London, England
Sounds like damp in the electrics to me, possibly slight misfire is what the OP means by sounding old

If it was water in the cylinders the engine would have seized already as water doesn't compress.

Not sure how water could contaminate the oil, but I suppose if it had done so perhaps the hydraulic tappets could be slightly noisy

I still put my ten pence on damp in electrics

Time for some wd40
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#3227946 - 12/26/13 01:34 AM Re: Engine sounds when revving [Re: sgvaibhav]
sgvaibhav Offline


Registered: 12/16/12
Posts: 94
Loc: Dubai, UAE, Middle East
Car is 2009 yaris.

I'll record the sound and post here, once i get to see his car...

Will check dipstick and ATF stick...

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#3227961 - 12/26/13 03:05 AM Re: Engine sounds when revving [Re: sgvaibhav]
bigjl Offline


Registered: 09/06/12
Posts: 1699
Loc: London, England
Solid little car.

Lets just hope it is nothjng more than water in the electrics.

A mate drove his 730ld into water during the recent floods in the UK. Unlit road and he little time to react just managed to scrubb off a little speed.

That ingested water an siezed instantly.

Estimate could be 10k.

Car is 2 yrs old with 70k and was the MD of BMW UK company carvfkr first six month so is well optioned.

Must be worth an easy 30k still hopefully so hopefully the Insurancs will repsir rather than write it off.
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#3228006 - 12/26/13 06:11 AM Re: Engine sounds when revving [Re: sgvaibhav]
toneydoc Offline


Registered: 12/16/11
Posts: 979
Loc: War Eagle
Water in exhaust might have ruined cat and or muffler. If he got water in oil, it may not show on dipstick. Did water get inside the car when you drove it in flood?
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#3228075 - 12/26/13 08:09 AM Re: Engine sounds when revving [Re: toneydoc]
eljefino Offline


Registered: 06/15/03
Posts: 24000
Loc: ME
Originally Posted By: toneydoc
Water in exhaust might have ruined cat and or muffler. If he got water in oil, it may not show on dipstick. Did water get inside the car when you drove it in flood?


I'm thinking the thermal shock from the cat (if it has one) hitting the water did in a heat shield or maybe some piping.

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#3228168 - 12/26/13 10:49 AM Re: Engine sounds when revving [Re: eljefino]
SteveSRT8 Online   content


Registered: 10/10/08
Posts: 14866
Loc: Sunny Florida
Originally Posted By: eljefino
Originally Posted By: toneydoc
Water in exhaust might have ruined cat and or muffler. If he got water in oil, it may not show on dipstick. Did water get inside the car when you drove it in flood?


I'm thinking the thermal shock from the cat (if it has one) hitting the water did in a heat shield or maybe some piping.


This is possible. Even just dunking them can cause stresses and rattles result.

And there's always water inside a cat until it is hot, as it cools water condenses in it just like it does in your muffler.
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#3228735 - 12/26/13 09:41 PM Re: Engine sounds when revving [Re: sgvaibhav]
TallPaul Offline


Registered: 10/22/03
Posts: 12915
Loc: By Detroit
Besides sounding "old" which others explained could be a damaged catalytic converter, does the car have normal power? But before you test that, check for water in the oil with this procedure:
Crackle test procedure
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#3229324 - 12/27/13 05:46 PM Re: Engine sounds when revving [Re: sgvaibhav]
dailydriver Offline


Registered: 03/14/06
Posts: 7015
Loc: Bucks County, Pa.
IF it were a 'mild' form of hydrolock caused rod knock due to water ingestion, the engine would have stalled out in the water he forded.

So hopefully, it is NOT that.
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#3229662 - 12/28/13 12:39 AM Re: Engine sounds when revving [Re: ClutchDisc]
ram_man Offline


Registered: 03/15/13
Posts: 1654
Loc: southern mo
Originally Posted By: ClutchDisc
Originally Posted By: sgvaibhav
The car sounds like its old when he revs.

What's a car sound like when it's old?


Thats a new one it sounds old?
Not sure how to describe that.
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