why is the motor knocking, and my oil light on

Information on the naturally-aspirated KA24E and KA24DE engines.
spitfire7
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Joined: Sun Jan 22, 2006 12:43 pm
Car: s13 silvia.
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reved it to 5500 rpms and it did well. when i got off the freeway i heard what i think are the lifters, or rockerarms knocking and my oil light was on. it still drives the same, but its a little loud. whos had the same problem. im new to 240's so can u guys help me out. thanks


silencer.1
Posts: 188
Joined: Tue May 11, 2004 1:20 pm
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What year is the car? Either way you are out of oil and it's probably rods knocking.

The oil light comes on at anything less than 7psi of oil. By then the damage is done and it's just a change engine light...

sileightysomeday
Posts: 145
Joined: Sun Mar 27, 2005 1:12 pm

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hehe, change engine light.... i like that one.

a while back my engine was low on oil and there was a slight knock, changed the oil and filled it up and everything was fine in my SOHC.

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SHIFT_240sx
Posts: 457
Joined: Sun Nov 09, 2003 8:42 am
Car: 91 Nissan 240sx SE Coupe
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you might want to check this website out http://www.car-part.com, buy yourself a new block and whatever else is damaged, sounds like exactly what happened to me about a year ago. good luck with that.

TheOne
Posts: 1836
Joined: Mon Aug 09, 2004 4:28 pm
Car: 93 240sx FB
Location: Arlington, TX

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either you went low on oil or your oil pump just stopped working(mine did after ~185k miles, or maybe it was 1 of the seals that helped it suck oil), but now that yer motor is knocking, especially @ 2-3k rpm's, that most likely means the rod bearings are bad and need replacing, maybe the crank is bad too now.

btw my engine ran fine till 1 day i revved to 6k rpms and the oil light came on:), then i got rod knocking and the cam journals in the head got messed up from low oil.

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Florida240sx
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2012 altima coupe 2.5s
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Mine knocks from 2500-3500.Only ran it 5minutes this way. So I still have a block and good crank so I can build it.

spitfire7
Posts: 71
Joined: Sun Jan 22, 2006 12:43 pm
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right now i feel really lucky. my car stopped knocking and the oil light is off, and it feels like it did b4. it drove normal all day so im gonna save some cash and sr my ride. hopefully it will hold up for a while. i love u guys comments. thanks.

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spider_slayer
Posts: 1999
Joined: Thu Sep 30, 2004 8:44 pm
Car: s14 240sx, s13 240sx

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spitfire7 wrote:right now i feel really lucky. my car stopped knocking and the oil light is off, and it feels like it did b4. it drove normal all day so im gonna save some cash and sr my ride. hopefully it will hold up for a while. i love u guys comments. thanks.
i promise you that the problem didn't go away.

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InsanityInc
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Joined: Wed Aug 18, 2004 7:43 am
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What, you mean oil pumps don't magically fix themselves?

Preposterous!

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spider_slayer
Posts: 1999
Joined: Thu Sep 30, 2004 8:44 pm
Car: s14 240sx, s13 240sx

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it'd be pretty cool if they did wouldn't it?


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