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Sep 20, 2012 | 02:13 AM

BottleFedZ346

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From: Orlando Fl.

Any Ideas?

Car has been running good up until last week when i went to leave for work!

Went to fire up the car last week and heard a knocking/tapping sound, looked @ the oil pressure and seen it was only @ 20-25psi, after about 5sec's the knocking went away and up went the oil pressure (60psi).....

Since that night the noise has not returned, i decided i wanted to make some big changes on my setup and tore down the motor, pulled the heads and found this!

It catches a nail pretty easily and im worried if i put it back together like this it might cause some more issues, if anybody has an idea please feel free to chime in!

Thanks!

Sep 20, 2012 | 02:18 AM

00MaroonZ28

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From: Brooklyn Center, MN

5.3's are nutorious for piston slap. Could be something related to that but thats usually a reoccuring thing during start-up.

Sep 20, 2012 | 02:30 AM

baalic

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From: Amarillo

If it only did it once then fixed itself its hard to diagnose. picture is hard to see really if it would make a differance...

Sep 20, 2012 | 02:35 AM

BottleFedZ346

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From: Orlando Fl.

I just wanna make sure before i dump a ton of money into this motor! lol

Sep 20, 2012 | 03:20 AM

a4ls2goat

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Probably piston slap.
Also, mine does this when cold, than it warms up and it goes away, probably the lifters have to pump up with oil again.

Sep 20, 2012 | 03:21 AM

BottleFedZ346

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From: Orlando Fl.

I was "told" the motor only had 42k on it, the pistons are decently clean with not much carbon buildup at all, but this just has me worried a little bit.....

Sep 20, 2012 | 03:27 AM

STEEPSS

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From: Ankeny, IA

Was this a junkyard motor? Looks like it spent some time with water in the cylinder. I've seen that before. A ball hone should take care of the cylinder wall, + new rings.