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Old 16th October 2010, 18:32   #1
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Default Engine noise on 1999 1.3L OHC

My OHC engine is making a noise which might be as described in this link
What's that sound ?? (What's that sound?)

Quote:
Noise: SSSSSSSSSSSS
WHERE: Under the hood.
WHEN: Anytime the engine is running, but itís most noticeable at idle speed.
WHAT: Vacuum leak. A rubber or plastic vacuum line or fitting has split or fallen apart.
URGENCY: If youíre wondering why your Check Engine light is on and why your car idles poorly, this is probably why.
FIX: Reconnect or replace the line.
There is no notable difference in drivability or performance.

The sound does not increase with high revs and is most noticeable at idle. The noise is not constant and kind of keeps varying and does cause a noticeable vibration.

Can anyone help me out, what could be the problem?

Last edited by micraft : 16th October 2010 at 18:34. Reason: to put more correct thread title
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Old 16th October 2010, 18:45   #2
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Check for vacuum leaks and cracks in the air intake routing.
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Old 16th October 2010, 19:02   #3
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This might sound stupid,
but how do i check for that.

I checked the air intake pipes till the air-filter, the air-filter needs to be replaced, but I don't think that is the reason for the noise.

How do i check for vacuum leaks?
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Old 18th October 2010, 00:10   #4
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check the intake system for leaks.

Engine noise on 1999 1.3L OHC-engine-bay-honda-large.jpg
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Old 18th October 2010, 04:57   #5
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Buy a spray can of carb cleaner. You'll find it at any auto spare-parts store.

Keep the engine running, start spraying a fine mist from the air intake towards the throttle body. Move slowly, so it's easier to notice. Look closely at the spot where you're spraying; just don't spray it into your eyes while doing it.

The leak will become obvious if it's there.
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Old 18th October 2010, 12:57   #6
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Quote:
Originally Posted by micraft View Post
Can anyone help me out, what could be the problem?
Another area to check is....
Did you scrape/bang the crankcase(Below the engine - Oil sump) of your City ?
Check the underbody of your car for the same.
If yes then get the crankcase bend removed.
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Old 18th October 2010, 20:59   #7
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After my reading, I understand that if there was a vacuum leak, i would be having very varying idle rpm, but I don't think that is the case. Please correct me if I'm wrong.


Thanks Sushratha,
I did have a bang and scrape the underbody, after which this problem started.
And I'm pretty much sure that I scraped the underbody below the engine.

How do I identify the crank case?

I'm googling now....!!!!
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Old 19th October 2010, 00:36   #8
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After my minor research, I understand that if the crank case gets bend, it's very serious. ....

Another V.Imp point : I checked the oil dip, and the level is at the high, earlier it used to be between high and low. I have a small feeling that the oil seal might be hit/bend.

Guys please gimme ur inputs...
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Old 19th October 2010, 02:10   #9
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Take it to a good mechanic. You are using big words without understanding what they mean.
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Old 19th October 2010, 08:25   #10
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Looks like Oil sump has got hit. Most of them are alloy based and would crack rather than getting bend, so that one would notice the leak immediately.
Dont keep driving the car in this condition. Oil circulation in the engine will be compromised which can lead to major issues.
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Old 19th October 2010, 10:14   #11
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OK, can anyone suggest a good mechanic for just this work, or else I'm planning on giving her to Dakshin Honda, which will really put a hole in my wallet.

I guess if its critical work its best to give it to Honda A.S.S.

How much do you guys estimate to get the oil sump replaced? I'm sure Honda A.S.S will not do any repairs, it would only replace.
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Old 19th October 2010, 13:32   #12
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Post deleted by the Team-BHP Support : Please do NOT post one-liners that add little or no informational value to the thread. We need your co-operation to maintain the overall quality of this forum.

Please read our rules before proceeding any further.

Last edited by GTO : 20th October 2010 at 11:32.
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Old 20th October 2010, 11:31   #13
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Quote:
Originally Posted by micraft View Post
OK, can anyone suggest a good mechanic for just this work, or else I'm planning on giving her to Dakshin Honda, which will really put a hole in my wallet.

I guess if its critical work its best to give it to Honda A.S.S.

How much do you guys estimate to get the oil sump replaced? I'm sure Honda A.S.S will not do any repairs, it would only replace.
Is the bend too much ?? Why don't you post a pic of your car's underbody ?
OHC crankcase is very delicate part ...
If you take it to Dakshin Honda, the'll simply tell you to replace the crankcase ... It'll burn your pocket into ashes.
Take it to a competent Mechanic, ask him as what can be done.
I have seen crankcase bend being removed by hammering... But this requires a good person who is good at tinkering...
In which area do you stay ?
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Old 20th October 2010, 14:11   #14
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Hi Sushrutha,

I reside in Bangalore, near BTM.

Do u know anyone who specializes in this kind of work?

I'll send pictures of the under-body tonight.

Thanks.
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Old 20th October 2010, 15:00   #15
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micraft, i would suggest you to consult Nagraj 9845275036, his workshop is in Koramangala.

It can be from the exhaust pipe too, get it checked thoroughly.

Last edited by lohithrao : 20th October 2010 at 15:18.
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