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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


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Old 09-23-2014, 11:43 AM   #1
Scratchoz
 
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KA24de Rattle

So I have the infamous chain rattle. I pulled the valve cover off and both of my guides have already been removed from the previous owner, I pulled my PS and water pump belt off so it's not any of my pulleys and it's definitely at the top front of the engine. The only thing I can think of is the timing chain tensioner...would a stuck tensioner still make a slapping noise when the valve cover is off?
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Old 09-23-2014, 12:04 PM   #2
Driftwire
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My car had the same noise and it ended up being cylinder 1 bearing was just worn enough to knock. Slapped in new bearings and she still runs strong as fuck and quiet. KA-T setup on 10psi.
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Did you check the potato fuse located in the front right corner of your gas tank?
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No i haven't. To be honest i didnt know there was a fuse there. Thats not a fuse for the fuel pump is it?
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Old 09-23-2014, 12:05 PM   #3
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And mine also sounded like it was right in the top of the motor.
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Did you check the potato fuse located in the front right corner of your gas tank?
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No i haven't. To be honest i didnt know there was a fuse there. Thats not a fuse for the fuel pump is it?
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Old 09-23-2014, 12:23 PM   #4
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Have u checked your oil for metal shavings? Can b a sign that your chain is rubbing or like stated above ^
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Old 09-23-2014, 12:34 PM   #5
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It sounds too light to be a knock, but I will pull the first plug and see if it still makes noise.


I'm sorry I mispoke in the original post it's a literal rattle not slapping.
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Old 09-24-2014, 09:31 AM   #6
Night drifte89
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Any links on how to remove the guides?


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Old 09-24-2014, 11:30 AM   #7
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It's actually fairly easy just pull the valve cover off and you can get the top guide it's just two bolts. and pull the front cover off(make sure to put the engine TDC and mark your distributor before removing the timing cover) and the second guide is on the right with two bolts as well.
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Old 09-25-2014, 07:21 PM   #8
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Could be water pump bearing. Had one I think was going bad on a DE and it made a funny rattling like noise. Could also be a cylinder coming down with something as mentioned.

Also, I thought just one guide needed removed? Or is that just SOHC?
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