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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

knocking engine

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Old Dec 20, 2010 | 10:34 PM
  #1  
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superboy54
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knocking engine

Hi, I need some help figuring out what is going on with my 69 360 engine. Today in the morning i started up and started knocking on the right side. So i let it warm up and the knocking stop. So later on i started up again and the knocking got worse. I checked the oil level and its full. So im wandering what could it be. I also took the spark plug wires one by one to check if it could be a piston or rod, but still kept knocking. Any ideas or helped will be appreciated thanks.
 
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Old Dec 21, 2010 | 07:25 AM
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Talking

is it a manual trans?possibly clutch or throwout bearing.just my 2 cents
 
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Old Dec 21, 2010 | 08:51 AM
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PA74F250
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Maybe a bad lifter?
 
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Old Dec 21, 2010 | 09:26 AM
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kcw12
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Pull the valve cover on one side and make sure all your rocker arms are tight.
if they are leave the cover off, with a towel or something (oil is gonna squirt) and start the engine and see if everything looks right.
 
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Old Dec 21, 2010 | 12:43 PM
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my guess is a bad lifter too, cause it seems to smooth down ones the oil goes up.
 
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Old Dec 21, 2010 | 01:09 PM
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Describe the knock a little better.
Does it make the sound immediately when started ?
Does it go away as soon as the oil pressure builds up, or how long does it take to go away ?
Has your oil filter been relocated ?
Does it sound like a deep thudding knock, or a light tapping, or a loud clapping ?
Does it go with engine rpm when you rev it a little ?
 
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Old Dec 22, 2010 | 12:31 PM
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it starts when i start the engine, at first its a little loud tapping. then as the engine warms up and the oil goes up i guess it starts to smooth to a lighter tapping or sometimes it goes away.
 
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Old Dec 22, 2010 | 01:30 PM
  #8  
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Danger_Dave
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From: UPSTATE NY
Engine Noise Diagnosis 101
haha here u go the cure to all your problems, one of the best articles i ever read
 
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Old Dec 30, 2010 | 12:03 PM
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yes, no, maybe?
 
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Old Dec 30, 2010 | 09:21 PM
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Old blue 68
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I had the same thing on my 460 it had hydraulic lifter and as soon as they pump up the sound went away
 
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Old Dec 30, 2010 | 09:51 PM
  #11  
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Ziegelsteinfaust
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From: Chino Hills
You could try Lucas oil additive.

I used it in all my VW air-cooleds to help with lifter tapping since they were solid.
 
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Old Jan 2, 2011 | 03:40 PM
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Just did an oil change with thicker oil and it seemed to stop the tapping.
 
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Old Jan 2, 2011 | 07:38 PM
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hmm, watch you dont go with too thick of an oil. it is cold outside.
 
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Old Jan 6, 2011 | 03:22 PM
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I used 40 is it ok considering its an old engine, plus i live in el paso tx, not much cold down here.
 
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Old Jan 6, 2011 | 08:09 PM
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oil options. eek. lol. been there and still lost. Currently I just run 10w40 all year.
 
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