240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

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240sxAli4Life
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240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby 240sxAli4Life » Sun Nov 14, 2010 7:29 pm

Ok so i bought a 1993 Nissan 240sx! Its got 152,600 miles on the BONE STOCK KA24DE engine. It has the "marble in the tin can" noise coming from the front of the engine! So im pretty sure that its the upper and maybe side timing guide hittng/rubbing against the inside of the valve cover! I will post a video of it running on youtube tommorrow! I didnt take off the valve cover yet to see if thats for sure the problem! Mainly my whole question to everyone is... if i remove the guides (other than lower) from hitting the valve cover, will i still be able to daily drive my car, and still get on it, and revving high, without the timing chain ripping off?????? There is a link here on nico club that tells you exactly how to do it! Is this correct????? My car also seems as if its running kindav rough,like i never been past 4k rpm cause i feel the engine isnt running smooth, so i didnt want to hurt it! im gonna change the plugs, wires, and distributer cap soon, hopefully it will feel smoother when higher rpms! Also i know theres gonna be sludge inside of a engine that has 152k on it, so i want to know what kind of oil to use, and should i use any attitives like lucas oil stabilizer with it?? And does z max work?? I heard its suppose to clean slude out your engine, and make it run smoother???? Idk but if anyone knows of any attitives that i can put into it to clean slude out from inside of engine, let me know!

http://www.nicoclub.com/archives/fix-yo ... attle.html


Also i have a little bit of water spitting out of my exhaust! My friend told me that i may need to tighten the valves! How hard is that to do, and is that what the problem is?? Please let me know about this too!! Thanks!!!
Last edited by 240sxAli4Life on Tue Nov 16, 2010 11:18 am, edited 1 time in total.


seang
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby seang » Sun Nov 14, 2010 8:55 pm

I'm not sure about the timing chain guide, but seafoam works good in the crankcase at the ratio of 1.5oz/quart of oil. There is an article in general chat that is more specific on how to use it. I ran some through my crankcase and it worked fine.

Also; if you ever remove parts like the front cover, valve cover, or oil pan; clean any gunk out manually before reinstalling them. It is that much more clean surface area your oil will see during operation.

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240sxAli4Life
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby 240sxAli4Life » Sun Nov 14, 2010 10:13 pm

oh ya when i remove the valve cover ill clean as much as i can. But i heard of seafoaming but i dont know what it is, or what it does! Can you send me that link seang to that nico article about seafoaming? I need to remove my timing guides, and replace valve cover gasket, and do a oil change and tune up! I dont wanna say its running rough, but it feels like its not running smooth!

seang
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby seang » Sun Nov 14, 2010 10:53 pm

Here is that article: post5867622.html?hilit=seafoam#p5867622

Inline 4 cylinder engines with flat-plane cranks have imperfect secondary balance because the pistons travel faster at TDC than at BDC, this creates an up-down vibration at twice the crank speed. Some larger 4cyls (2 liters and up) use balance shafts, but the KA does not, so some level of NVH is not unrealistic.
Last edited by seang on Mon Nov 15, 2010 3:02 pm, edited 1 time in total.

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240sxAli4Life
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby 240sxAli4Life » Sun Nov 14, 2010 11:03 pm

Thanks for that article! Everything else you said idk what the hell your talking bout! LOL

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby Redevil » Mon Nov 15, 2010 11:12 pm

pop the vc off and remove the top guide. It might have broken and is rubbing against the chain which is common. If you still get some noise then you can replace the upper chain, tensioner and guide by removing that front cover. That should eliminate the noise.

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby OutToWinPAHC » Tue Nov 16, 2010 5:17 am

I dont think cleaning is gonna help. Its probably the guide. If not, get a chain kit before it jumps.

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby fiznowler » Tue Nov 16, 2010 7:52 am

can you remove the valvecover only and get to the top guide?

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby simmode1 » Tue Nov 16, 2010 9:44 am

fiznowler wrote:can you remove the valvecover only and get to the top guide?
Yep.

OP, my s13 was doing the same thing a few years ago. I originally thought it was the timing chain death rattle, but once I got the valve cover and crank case cover off I noticed the broken guide just sitting ontop of my timing chain and cam gears. I chucked that in the trash once I found that Nissan had deemed the timing chain guides unneccessary and removed them from S14 KA's.

I replaced my timing chain anyways but forgot to take out the lower guard, so it stayed in there for years until I got around to it this summer. It wasn't causeing any problems or making any noise, but I had some leaks I needed to seal up and just knowing that last guide was still in there annoyed the hell out of me.

Anyways, I found pulled that lower guide out to (along with a 248/232 cam swap) and now I wish I had left it in! My KA is waaaay noisier/rattley with the lower guard removed! Did this happen to anyone else who removed both their guards?

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby NICONick » Tue Nov 16, 2010 11:02 am

OutToWinPAHC wrote:I dont think cleaning is gonna help. Its probably the guide. If not, get a chain kit before it jumps.
Care to elaborate? before it jumps?
simmode1 wrote:
fiznowler wrote:can you remove the valvecover only and get to the top guide?
Yep.OP, my s13 was doing the same thing a few years ago. I originally thought it was the timing chain death rattle, but once I got the valve cover and crank case cover off I noticed the broken guide just sitting ontop of my timing chain and cam gears. I chucked that in the trash once I found that Nissan had deemed the timing chain guides unneccessary and removed them from S14 KA's.

I replaced my timing chain anyways but forgot to take out the lower guard, so it stayed in there for years until I got around to it this summer. It wasn't causeing any problems or making any noise, but I had some leaks I needed to seal up and just knowing that last guide was still in there annoyed the hell out of me.

Anyways, I found pulled that lower guide out to (along with a 248/232 cam swap) and now I wish I had left it in! My KA is waaaay noisier/rattley with the lower guard removed! Did this happen to anyone else who removed both their guards?
Timing chain death rattle?

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240sxAli4Life
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby 240sxAli4Life » Tue Nov 16, 2010 11:15 am

Redevil wrote:pop the vc off and remove the top guide. It might have broken and is rubbing against the chain which is common. If you still get some noise then you can replace the upper chain, tensioner and guide by removing that front cover. That should eliminate the noise.
Ya i think its the upper guide, but cant you take off the side guide too??? My engine is running a little rough, im gonna fix this guide thing so its running good for me to rev higher, and im gonna sea foam it, then do a tune up! Plugs, wires, and distributer cap! hopefully after that it will be running good again!

JKL1031
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby JKL1031 » Wed Jun 29, 2011 10:15 pm

how much chain slack is allowed on the exhaust side?

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby Mercury_Hg » Wed Jun 29, 2011 11:04 pm

simmode1 wrote:
fiznowler wrote:can you remove the valvecover only and get to the top guide?
Yep.

OP, my s13 was doing the same thing a few years ago. I originally thought it was the timing chain death rattle, but once I got the valve cover and crank case cover off I noticed the broken guide just sitting ontop of my timing chain and cam gears. I chucked that in the trash once I found that Nissan had deemed the timing chain guides unneccessary and removed them from S14 KA's.

I replaced my timing chain anyways but forgot to take out the lower guard, so it stayed in there for years until I got around to it this summer. It wasn't causeing any problems or making any noise, but I had some leaks I needed to seal up and just knowing that last guide was still in there annoyed the hell out of me.

Anyways, I found pulled that lower guide out to (along with a 248/232 cam swap) and now I wish I had left it in! My KA is waaaay noisier/rattley with the lower guard removed! Did this happen to anyone else who removed both their guards?
Are you talking about the guide next to the upper chain tensioner or the guide below it?

I think the one below it is necessary. Only the very top one is extraneous. I removed the middle guide too and I still get a bit of noise, but not as much as before.

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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby allenms240 » Wed Jun 29, 2011 11:15 pm

Hydrocarbon (Fuel) + Oxygen (burning the fuel in O2) ---->H2O + CO2 + Energy.
The water you see coming out of the exhaust is normal, its the water vapor from the reactions going on inside the motor.

JKL1031
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Re: 240sx KA24DE TIMING CHAIN RATTLE!! I NEED HELP!!

Postby JKL1031 » Thu Jun 30, 2011 7:19 am

:sad: I bumped this thread from 2010 asking about the upper chain slack.


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