sr20det ROD KNOCK QUESTION AND HELP??????

[sidedrifts13]

I have a red top sr20det and i just got it running today, the main reason why i am worried is when i rev the engine up to 3 or 4 rpm i hear a knock but not at high rpms and not at idle can it be a rod knock? Or just a lifter? I don't know, i am pretty bummed out, i think its a rod knock i will get a video up tomorrow, ima go out for a drive on my daily so i can keep my mind off it, dammm
I GUESS WHAT I AM TRYING TO ASK IS; IF IT WAS A ROD KNOCK WILL IT BE KNOCKING ALL THE TIME?
CLICK LINK BELOW FOR VIDEO IT DOESN'T SOUND GOOD


YouTube - S7303323.AVI (http://www.youtube.com/watch?v=IXeZPbhfs8M)

[sidedrifts13]

Anybody have an input?

[Sileighty_85]

Yes it will quietly knock at idle and sound will get fast and louder as RPM's increase.

Is it a "Knock" or a "Tick"

Post a vid if possible

[sidedrifts13]

from the sound of it i would say its a knocking sound ill get a vid up tomorrow morning

[Ceepo]

pull the oilpan and inspect for chunks of bearing...

[brian3676]

If it is knock then it will just get worse and worse, you have to do a rebuild before it gets worse and runes other things too if it is knock

[sidedrifts13]

video is up it doesnt sound too good damm no more money for this project

[sidedrifts13]

anybody had the same knock?

[codyace]

RIP SR20

That's rodknock. I've heard this 100 times

you've got two options

1:(backyard hope for you life 100 dollar gamble)...roll a new set of rod bearings in, one size over, hope for the best

2: Get a new long block.


Hope she treated you well, there's no mistaking that sound.

[sidedrifts13]

I figured it was a rod knock this motor was definately a pain in the butt I was pretty bumep, but now i just got to move forward and figure out what i'm going to do, i just did a t28 turbo upgrade damm o well everything has a solution except for death really.... my 240 will be out of comission for a while but i cant wait to drift the f*** out of it
RIP SR20

That's rodknock. I've heard this 100 times

you've got two options

1:(backyard hope for you life 100 dollar gamble)...roll a new set of rod bearings in, one size over, hope for the best

2: Get a new long block.


Hope she treated you well, there's no mistaking that sound.

[codyace]

I figured it was a rod knock this motor was definately a pain in the butt I was pretty bumep, but now i just got to move forward and figure out what i'm going to do, i just did a t28 turbo upgrade damm o well everything has a solution except for death really.... my 240 will be out of comission for a while but i cant wait to drift the f*** out of it

IF you do decided to reuse the block you have, just make sure your crank and rods are in spec. They usually are if you catch knock soon enough, and you can usually get away with new bearings and then you're happy forever.

[sidedrifts13]

sounds like a plan im gonna get it fixed asap anybody know a good place where i can take it to? any local mechanics or mobile mechanics that would do the work?

[codyace]

sounds like a plan im gonna get it fixed asap anybody know a good place where i can take it to? any local mechanics or mobile mechanics that would do the work?

Are you in NJ?

[sidedrifts13]

I am located in los angeles CA

[fliprayzin240sx]

Yup, thats definitely rod knock. Only other time that I head a knock like that and it turned out not to be rod knock was with Hypnotik. His shit wasnt rod knock, it was piston slap. His #3 cylinder somehow was shaped like an egg and the piston was slapping on the the side of the cylinder.

[Walperstyle]

if you are changing out the little things, you could also take this time to beef up the head, rocker arm stoppers, cams, and maybe different pistons and rods on the bottom if you wanted to go hardcore.

[sidedrifts13]

Some of my buddies dont think its a rod knock damm where in socal can i go get this checked asap?

[armand]

anybody had the same knock?

yes my sr makes the same noise as yours at the exact rpm range no noise below or above that rpm range, my motor has been making that noise for 4 almost 5 years now ever since it was rebuilt. the noise has not got any worse overtime.i have pulled the oil pan many times and it been clean every time. my car is daily driven every day to and from work.i don't know what the noise is there have been other people with same noise at the same rpm range.

[steve shadows]

If you can get down to LB tomorrow I will give you a couple hours of my time to check it out and give you a final answer. If it's what I think it is (other than rod knock) I may be able to fix it on the spot

[sidedrifts13]

anybody else have any input before i part it out??????????????????????????????

[steve shadows]

checked out the car today in person.

This should go as a lesson to swap shops and other DIY'er to make sure to pull the oil pan and check the oil pick up condition as well as hammer out the oil pan or use an upgraded one right off the bat.

These motor's are seriously sensitive to oil starvation of any kind.

I have suggested that he pull the oil pan, check for copper filings from any possible bearing wear and replace the oil pick up if it's broken.

If the oil pressure is just started to fail then you can catch it, get the oil pressure back up to where it needs to be and eliminate the little amount of metal on metal knock you are having with your motor. Saving it.

But it will be a close one.

[sidedrifts13]

Okay guys so I finally droped my oil pan and i found some brass shavings in the oil and also a thicker piece of brass which i am trying to figure out where it came from because it is thicker than a rod bearing and its brass on the inside and outside any ideas???????? i will have pics in a bit

[sidedrifts13]

http://i86.photobucket.com/albums/k96/tinkerbell_blkcherry/SSPX0189.jpg?t=1263379040
http://i86.photobucket.com/albums/k96/tinkerbell_blkcherry/SSPX0187.jpg?t=1263379192
The small piece looks to be like a brass material anyone know where it could have shaved off from? thanks for the help and sorry for the crappy cell pics

[codyace]

brass could be from a thrust bearing? hard to really tell

[sidedrifts13]

that's what I was thinking anyone else have an input? thanksbrass could be from a thrust bearing? hard to really tell

[Ceepo]

at least your bearing didnt look like this lol...
http://c4.ac-images.myspacecdn.com/images02/54/l_207ecb9dc2024032813f3b445f6a3fbf.jpg

This is what my oilpan looked like when i bought my motor...
http://c2.ac-images.myspacecdn.com/images02/31/l_3add8f85862a4f9da1ad5f99f8c6d1e9.jpg

I hope all goes well with repairing your motor... i honestly would rebuild that motor...

[sidedrifts13]

yeah mine wasn't that bad but still need to find out what that bigger brass piece is from i wonder if its from the trust bearing, or even the timing chain tensioner
at least your bearing didnt look like this lol...
http://c4.ac-images.myspacecdn.com/images02/54/l_207ecb9dc2024032813f3b445f6a3fbf.jpg

This is what my oilpan looked like when i bought my motor...
http://c2.ac-images.myspacecdn.com/images02/31/l_3add8f85862a4f9da1ad5f99f8c6d1e9.jpg

I hope all goes well with repairing your motor... i honestly would rebuild that motor...

[codyace]

Tensioner would either be plastic or metal

[sidedrifts13]

tensioner would either be plastic or metal
cool thanks i ima go get a rebuild anyone know where do they do good work for good prices here in socal? Thanks

[Shorsh]

put a b16a in your 240

[codyace]

cool thanks i ima go get a rebuild anyone know where do they do good work for good prices here in socal? Thanks

PM 'Steve Shadows'

[240sxcure]

Is there any other way to distinguish early rod knock and maybe valve tapping?

I just installed my motor, and it sounds like it could be either.

[sidedrifts13]

put up a video so people can hear it, dont run it first pull out your oil pan check your oil pick up make sure is good and look for brass shavings, also make sure your oil pan isn't dented
Is there any other way to distinguish early rod knock and maybe valve tapping?

I just installed my motor, and it sounds like it could be either.

[240sxcure]

I had already installed a s14 pick up and new pan before starting it. When I removed the previous pan it had no metal shavings and the oil was clean. The previous pan had some light dents but nothing major.

I'll try to put up a video.

[jspek]

yes that is rod knock. basically a rebuild is needed or it will pop one day. mine lasted 3 months before it just stopped haha.

[sidedrifts13]

how much does a rebuild cost just for the block?

[lost240soul]

i know it sounds kinda stupid but look at ur alternator bracket.. cause i thought i had some upper valve noise and turns out to the the altornator bracket was broken it did it at the same rpm range..

[Smurf_240SX]

i know it sounds kinda stupid but look at ur alternator bracket.. cause i thought i had some upper valve noise and turns out to the the altornator bracket was broken it did it at the same rpm range..

:stupid:
X2 Mine turned out to be my Alternator pulley bearing was getting ready to seize so it would knock (Knock would come and go might I add) and sounded like noise was coming from the engine, till one day it finally just seized in front of my driveway while it was running I immediately turned car off.

Here's a clip I took of the knocking
http://i75.photobucket.com/albums/i320/DJSmurf_1/th_DSCN2918.jpg (http://s75.photobucket.com/albums/i320/DJSmurf_1/?action=view&current=DSCN2918.flv)

[sidedrifts13]

lucky you i got to rebuild my sr how much does it cost anyone know?

[Odysseus]

I recently had a rod knock SR...For about 1K in parts you can build a pretty nice bottom end and not have to worry about it again. Eagle rods, Supertech pistons and rings, ACL bearings, new OEM oil pump and pickup, etc.

Thats basically the route I went with mine. Hopefully your crank is fine. But yeah..gotta pay machine shop charges too...

Idk, fuck its late. Sorry about your motor.

[sidedrifts13]

yeah i am kinda tight on cash and im trying to see what route to go with thanks for the help damm im still pretty bummed about my motor and its been almost a month..
I recently had a rod knock SR...For about 1K in parts you can build a pretty nice bottom end and not have to worry about it again. Eagle rods, Supertech pistons and rings, ACL bearings, new OEM oil pump and pickup, etc.

Thats basically the route I went with mine. Hopefully your crank is fine. But yeah..gotta pay machine shop charges too...

Idk, fuck its late. Sorry about your motor.