Engine knock
Thread Starter
4th Gear
Joined: Oct 2011
Posts: 4
Likes: 0
Engine knock
Hi I have a 68 454- drove it a few times this summer and the last time out it started knocking about a mile from the house. It knocks LOUD when idleing and faster when pressing on the accelerator.
Any idea what this might be and a possible fix without a mechanic?
Thanks!
Any idea what this might be and a possible fix without a mechanic?
Thanks!
Drifting
Joined: Dec 2002
Posts: 1,946
Likes: 28
From: Long Beach CA
As he says, try to locate the noise with a stethoscope. You can also, with the engine idling, pull off the spark plug wires one at at time (carefully, there's a lot of voltage there!). If the noise goes away or diminishes, that'll tell you which cylinder it is -- usually indicates a bad rod bearing.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
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Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Put a timing light on it. Move it from one plug wire to the next until the flash matches the knock and that will locate the cylinder. The the timing of the knock will tell you it it's in the valve train or the bottom end.