Who can recognize this engine sound?
Thread Starter
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
Who can recognize this engine sound?
Sound comes from right rear cylinder area
5 sec
http://www.youtube.com/watch?v=8U-NLNMTvJ8
9 sec
http://www.youtube.com/watch?v=G_cWXLqiQjw
28 second. Walking around to locate sound.
http://www.youtube.com/watch?v=_3Xsv2Qc4U8
5 sec
http://www.youtube.com/watch?v=8U-NLNMTvJ8
9 sec
http://www.youtube.com/watch?v=G_cWXLqiQjw
28 second. Walking around to locate sound.
http://www.youtube.com/watch?v=_3Xsv2Qc4U8
Burning Brakes
Joined: Aug 2007
Posts: 917
Likes: 2
From: Charlotte NC
You talking about the under watter sound? I cant tell if it is just the video or not.
Sounds like open compression to me, Check your spark plugs. One maybe loose and letting compression blow by.
The liquid splatter on the back of each valve cover is that related to you prob?
Also remove the oil fill cap with it running, if it has jumped time, or burnt a valve compression will blow by into the valve cover. You will be able to fell an extreme amount of pressure as you put you have over the oil cap hole.
Other then that I can't hear enough from a video.
Sounds like open compression to me, Check your spark plugs. One maybe loose and letting compression blow by.
The liquid splatter on the back of each valve cover is that related to you prob?
Also remove the oil fill cap with it running, if it has jumped time, or burnt a valve compression will blow by into the valve cover. You will be able to fell an extreme amount of pressure as you put you have over the oil cap hole.
Other then that I can't hear enough from a video.
Le Mans Master
Joined: Feb 1999
Posts: 6,470
Likes: 2
From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
Thread Starter
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
On longest video I begun shooting from left side, there was pretty quet sound. Sound got louder when I moved to rear of right side.
I was listening with stethoscope with stick touching engine and didn't hear anything. I removed stick listening w/o touching engine and located sound near right rear cylinder.
25th second of longest video has loudest sound. Note that camera moved closer to right rear cylinder. Engine is slightly shaking like it has vacuum leak or one cylinder doesn't fire.
On shortest video sound gets louder when camera moves closer.
I was listening with stethoscope with stick touching engine and didn't hear anything. I removed stick listening w/o touching engine and located sound near right rear cylinder.
25th second of longest video has loudest sound. Note that camera moved closer to right rear cylinder. Engine is slightly shaking like it has vacuum leak or one cylinder doesn't fire.
On shortest video sound gets louder when camera moves closer.
Last edited by car5car; Apr 6, 2010 at 12:15 AM.
Burning Brakes
Joined: Aug 2007
Posts: 917
Likes: 2
From: Charlotte NC
Did the sound start after you washed the motor? Is your SES light on?
And could you describe the sound to us. I hear something that sounds like a air compressor pump, and I agree with Calderone about the ping sound.
And could you describe the sound to us. I hear something that sounds like a air compressor pump, and I agree with Calderone about the ping sound.
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Thread Starter
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
I just need to listen better.
Instructor
Joined: Feb 2010
Posts: 217
Likes: 0
From: Sherman Oaks CA
Mine makes that same whup whup whup noise, only when its cold, only on the passenger side. I pulled the valve covers and torqed down the roller rockers to FSM specs, noise still there. My 2000 chevy truck , with a 327 made a very similar noise on the passenger side as well, a little higher pitched.
Instructor
Joined: Feb 2010
Posts: 217
Likes: 0
From: Sherman Oaks CA
What would would cause piston slap? This would be the 4th chevy motor I have heard that noise on.....the truck I had made it to 130k miles with that noise btw.
Last edited by dirtcheap74; Apr 9, 2010 at 08:08 PM.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
i discarded all the accesories and pulleys by starting the engine with no belt, that noise,squeak was gone when i adjusted valves so i thought it was pushrods against the guideplates,it was terrible,so ..i ended up swapping heads which leaded me to a cam intake roller rockers headers swap as well ....LOL
Thread Starter
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
Exhaust manifold had 2 cracks in it. Welder is charging me $30 for cracks+ 5-10 for attaching shield. Additional minor sound was bad idler pulley.
Last edited by car5car; Apr 13, 2010 at 03:37 PM.