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#66317 09/24/2006 3:47 AM | Joined: Dec 2003 Posts: 2,953 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 2,953 | Starting to sound paranoid here but of late I am gettinga metallic tapping sound from the engine. Hear it when I am idling.
From the frequency I would like to think it is a lifter/valve train noise as opposed to an engine knock. The engine idles quite smoothly.
Is there an audible difference between the two? How could I distinguish one from the other or could I?
This is not a thumping sound, more of a tapping sound. I would also think if it was a knock it would not be frequent at idle whereas this is.
In a previous post about oil pressure I mention some lifter noise at start up when it is cold. | | |
#66318 09/24/2006 3:49 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Hydraulic or solid? If hydraulic, they might be a little loose.
Bill Burmeister
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#66319 09/24/2006 3:58 AM | Joined: Dec 2003 Posts: 2,953 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 2,953 | | | |
#66320 09/24/2006 4:42 AM | Joined: Jun 2006 Posts: 687 Shop Shark | | Shop Shark Joined: Jun 2006 Posts: 687 | Well an engine knock (bearing noise) is just that, a noise simmiler to the sound of 2 big blocks of wood banging together. A tappet hoise similer to a hammer tapping steel.
How is you oil pressure and have you inspected your oil lately?
Oh a tip if the knock is heard (bearing noise) you can in some cases if it is a rod bearing not a main bearing remove the plug wires one at a time with the engine running if the noise changes you have probably found your culpret.
If not removal of the oil pan and a visual inspection of rod and main bearings can be made.
Unfortunitely cam bearings can't be inspected unless you remove the cam.
A tip on lifter noise. You can remove the valve cover and reconnect the plug wires then start the engine (yea some oil is gonna splash out so don't rev it up and dont waste time. Take a hammer use the wooden end (engine running) and push it against the push rod end of the rocker arm. if the noise changes you have found your problem.
Good luck
I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"
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#66321 09/24/2006 4:49 AM | Joined: Jun 2006 Posts: 687 Shop Shark | | Shop Shark Joined: Jun 2006 Posts: 687 | Sounds like you have answered that other post on low oil pressure. Maybe it wasn't normal for your oil pressure to drop that low.
I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"
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#66322 09/25/2006 4:39 PM | Joined: Feb 2001 Posts: 81 Shop Shark | | Shop Shark Joined: Feb 2001 Posts: 81 | Sounds like you have an oil pressure problem to me!! Install a good gauge to confirm but if the hydraulic lifters are adjusted correctly and making noise you have a serious oil pressure problem. To keep running the engine will cause damage! Good hunting...
Green Machine
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