Sharp tapping from the engine..
Thread Starter
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Sharp tapping from the engine..
I heard a sharp tapping from the engine this morning.. can't quite place where it is, but it seems to be coming from the right rear of the engine.
not sure what it is.. I'm thinking maybe a valve?
not sure what it is.. I'm thinking maybe a valve?
Melting Slicks
Joined: Jun 2002
Posts: 2,844
Likes: 99
From: Orrtanna Pa.
Re: Sharp tapping from the engine.. (sammyb)
How's the oil pressure?If that's OK,maybe the starter bendix is not fully retracting the starter gear from the flywheel.I had that happen to a 327 once and could have sworn it was a valve tapping,but when I replaced the starter the tapping went away.
Thread Starter
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Re: Sharp tapping from the engine.. (The Money Pit)
How's the oil pressure?If that's OK,maybe the starter bendix is not fully retracting the starter gear from the flywheel.I had that happen to a 327 once and could have sworn it was a valve tapping,but when I replaced the starter the tapping went away.
Thread Starter
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Re: Sharp tapping from the engine.. (sammyb)
If it sounds like a ticking, it could be an exhaust manifold leak. Try torquing the manifold bolts.
Instructor
Joined: Jul 2003
Posts: 100
Likes: 0
From: Belton Tx
Re: Sharp tapping from the engine.. (Markm10431)
I hope someone can help, I have the same problem... In shop twice, with no help. Did have someone say could be a bolt on the flywheel... I hadn't thought about the starter, could be :confused:
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Thread Starter
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Re: Sharp tapping from the engine.. (Tominator)
noticed it this morning when i was moving it.. also cause a gas smell, but I don't think they are related
Pro
Joined: Sep 2002
Posts: 690
Likes: 1
From: near Memphis TN
Re: Sharp tapping from the engine.. (Markm10431)
Like I told you before until you isolate where the sound is coming from no one can help you. Also tell us - does it increase with RPM?, does it increase with speed? Does it go away when your car warms up? Is it from outside the engine (transmission/heater box/cables)? Is it coming from the valve covers? Is it coming from the bottom end?
...these are the possiblilities: loose rocker arm or valve train problem, exhaust leak at manifold, bad speedometer or tach cable, bent rod (bad news!), heater box fan rubbing against something, and about a dozen other causes.
...these are the possiblilities: loose rocker arm or valve train problem, exhaust leak at manifold, bad speedometer or tach cable, bent rod (bad news!), heater box fan rubbing against something, and about a dozen other causes.
Racer
Joined: Jan 2004
Posts: 340
Likes: 1
From: St. Clair Shores Michigan
Re: Sharp tapping from the engine.. (SpyderD)
Try taking a long screwdriver hold it in your fist touch the screwdriver to various parts of the motor, touch the other end of your fist to your ear....you'll be amazed at what you hear !! Old timer trick I learned a couple weeks ago.... :thumbs:
Melting Slicks
Joined: Apr 2000
Posts: 3,286
Likes: 8
From: San Jose California
Re: Sharp tapping from the engine.. (motown 71)
Try taking a long screwdriver hold it in your fist touch the screwdriver to various parts of the motor, touch the other end of your fist to your ear....you'll be amazed at what you hear !! Old timer trick I learned a couple weeks ago.... :thumbs:
Chuck
Drifting
Joined: Jun 2001
Posts: 1,809
Likes: 0
Re: Sharp tapping from the engine.. (lpguthrie)
I hope someone can help, I have the same problem... In shop twice, with no help. Did have someone say could be a bolt on the flywheel... I hadn't thought about the starter, could be :confused:
If that is the problem jack the car up and take off the dust cover and see if a bolt is in it.
[Modified by Tominator, 11:09 PM 4/12/2004]
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Sharp tapping from the engine.. (motown 71)
Try taking a long screwdriver hold it in your fist touch the screwdriver to various parts of the motor, touch the other end of your fist to your ear....you'll be amazed at what you hear !! Old timer trick I learned a couple weeks ago.... :thumbs:
8th Gear
Joined: Apr 2004
Posts: 8
Likes: 0
From: wareham ma
Re: Sharp tapping from the engine.. (Markm10431)
did you recently take off the valve covers and adjust any lifters?
A friend and I replaced a blown head gasket on a built 350 in a '79 camaro... and when putting it all back together one of the top lifter bolts (which were specially shaped to fit one way, curved bottom to fit the cup shape of the lifter) .. somehow got put in upsidedown (wasnt me!) and made a ticking sound.
I know that's off beat and 99% not likely your case, but interesting story none the less, was a real pain in the butt to find out what that was.
A friend and I replaced a blown head gasket on a built 350 in a '79 camaro... and when putting it all back together one of the top lifter bolts (which were specially shaped to fit one way, curved bottom to fit the cup shape of the lifter) .. somehow got put in upsidedown (wasnt me!) and made a ticking sound.
I know that's off beat and 99% not likely your case, but interesting story none the less, was a real pain in the butt to find out what that was.
Thread Starter
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Re: Sharp tapping from the engine.. (tomservo291)
ony work that's been done is the tranny rebuild.. 5 days before I noticed the sound
Pro
Joined: Oct 2003
Posts: 641
Likes: 2
From: Storm lake Iowa
Re: Sharp tapping from the engine.. (Markm10431)
Had a similar noise start all of a sudden while driving a week ago...broken intake valve on cylinder #8! Would still start and run :eek: , but very rough idle (go figure :D ). I couldn't see the problem until I started removing rocker arms...
-Roy
[Modified by Grinchia, 9:10 AM 4/23/2004]
-Roy
[Modified by Grinchia, 9:10 AM 4/23/2004]
Race Director
Joined: Jan 2004
Posts: 18,398
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From: If the world didnt suck, we would all fall off. Troy,Ohio.
Cruise-In VI Veteran
St. Jude Donor '04-'05-'06-'07-'08
Re: Sharp tapping from the engine.. (Markm10431)
Sounds like a rocker, find it and tighten it a 1/8 turn.