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#1
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engine knock
there is a slight knocking noise coming from the passenger side of the timing belt cover. the noise dose not get louder when rpm's rise, also when i put my hand on the timing cover i can feel the knocking. dose anyone know what this is ?
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I has teh FWD LS-L |
#2
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Re: engine knock
Could be a collapsed lifter, change your oil lately?
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#3
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Re: engine knock
yeah about a month ago. i took off the timing cover and nothing is rubbing. a friend of mine is saying it might be a rod knock.
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I has teh FWD LS-L |
#4
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Re: engine knock
Rod knock would be loud (like HOly Shi!t loud), you would not have much oil pressure and it will destroy itself relatively quickly. My guess would be piston slap. If you could get a video or audio, it would help
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#5
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Re: engine knock
i'll get a vid up but what is piston slap ?
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I has teh FWD LS-L |
#6
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Re: engine knock
Piston slap is when the piston literally "slaps" into the side of the cylinder walls normally caused by a bad ring but there can be other causes.
My silver currently has this so if you get a vid up, i could tell you if thats what it is easily. Even without mine for comparison, its relatively easy to tell. |
#7
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Re: engine knock
i'll try to get a vid as soon as possible. i just did a 4.11 swap, i really don't feel like doing an engine swap too.
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I has teh FWD LS-L |
#8
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Re: engine knock
Quote:
As so-cal said, it could just be a lifter in which case there are a few tricks that could work. |
#9
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Re: engine knock
Also since you live in FL, you can do a 20w50 oil change next time, or even 15w40 diesel oil, and add some Lucas oil stabilizer in there. With thicker, sticky oil your oil pressure should go up, and also help cushion any slap present. The only drawback is slightly worse gas mileage from the oil windage.
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#10
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Re: engine knock
well if it helps iv'e been running penzoil platinum full synthetic 10w-40.
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I has teh FWD LS-L |
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