Another sr20 timing chain rattle thread

[wangan_cruiser]

ok


to start this problem i have a brand new set of timing chain kit for the sr20 with the updated timing chain kit and tensioner


im having this rattle on the top of the valve cover.



what i did so far is


swap tensioner

then it went away.

then it came back.

swapped the new one

it went away


i drove it around the block for a test drive


it came back.



im tired figuring this thing out. ive search here and theres a bunch of thread came out with no fix its just bunch of ideas but no one ever fixed it.


and pls read the title before posting because some people always get it mistaken as a KA problem.



thanks

[wangan_cruiser]

and add up to that


is it possible adjusting the cas can make the chain to jump off a tooth that can cause slack and rattle?

[wangan_cruiser]

anyone knows?

[rc1honda]

Might not be your timing chain. Could be lifter tap meaning you would have to bleed the lifters. Also check your rockers to make sure there is no damage. Also check the top of the retainers there is a little shim piece the holds the rockers on the retainers. i actually lost one of those without popping the rocker off. It made a crazy loud tapping.

[weissguy]

timing chain will not/cannot jump teeth from CAS adjustment. Like said above, it could just be tapping lifters/head noise.

In a worst case scenario it could be your bearings going bad/being bad. I looked at an sr20 powered 240 that had what sounded like timing chain whirring but it ended up being rod bearings.

[wangan_cruiser]

i think i already found the problem


the timing chain guide that being pushed by the tensioner came loose.


as you can see at the pic im inserting. one is the proper set of the timing guide.

http://i585.photobucket.com/albums/ss295/wangan_cruiser/Picture010-1.jpg



then the second one is how big is the play.

http://i585.photobucket.com/albums/ss295/wangan_cruiser/Picture009-1.jpg







then the vid itself explains how big is the play and it does make the identical sound when the car is running.

Picture011-1.flv video by wangan_cruiser - Photobucket (http://s585.photobucket.com/albums/ss295/wangan_cruiser/?action=view&current=Picture011-1.flv)

[wangan_cruiser]

update.



i pulled out the oil pump cover and i found the screw that holds the tension guide from the left if u r facing the motor is wobbling.


i tried 3 tension guides and they still wobble.


ill post pics tomm.

[artdrifter]

just take the timing chain guide off. thats what i did and i never had problems.

[wangan_cruiser]

im talking about the guide that on the left side not the top one.

[wangan_cruiser]

anyone? someone has gotta say something about this problem

[projectRDM]

When you say the screw wobbles, do you mean that even when tightened it has play, enough for the guide to move?

[wangan_cruiser]

yea it has a wobble even i torque it down per fsm.


its a brand new timing chain kit as well.


i tried the oem one initally came with the car and it does wobble too.


ill post pic tomm.

[VNG704]

When you say the screw wobbles, do you mean that even when tightened it has play, enough for the guide to move?
I think he meant to say the guide wobbles, not the screw. I have my motor apart with a new timing chain kit on there too. Just checked it has slack and can wobble left, right, back, and forth as well, so that can't be your problem.

[projectRDM]

I think he meant to say the guide wobbles, not the screw. I have my motor apart with a new timing chain kit on there too. Just checked it has slack and can wobble left, right, back, and forth as well, so that can't be your problem.

No, I meant the screw (bolt). If it's wobbling, that's the problem. Think about it, if whatever secures the guide is loose, the guide will be loose from the start. I haven't fooled with an SR in years, but on KAs that bolt has a shoulder on it, it fits flush into the guide and allows for zero play except for it to swing against the chain for tension.

[VNG704]

No, I meant the screw (bolt). If it's wobbling, that's the problem. Think about it, if whatever secures the guide is loose, the guide will be loose from the start. I haven't fooled with an SR in years, but on KAs that bolt has a shoulder on it, it fits flush into the guide and allows for zero play except for it to swing against the chain for tension.
Yes, but I think wangan cruiser is talking about the wobble in the guide. I looked at my motor and the bolt is tight with no slack yet the guide still wobbles. So I'm thinking his noise is coming from somewhere else.

[wangan_cruiser]

hey vng704 thanks for verifying.


and yes sorry russ i meant the tension guide is wobbling on my sr and the tension bolt was sitting nice and tight with 0 play.

it is exact thing vgn said, the moving timing chain guide wobbles from the tension bolt even it is torque down per fsm.


since that is already verified, like i said im wondering if the chain jump off a tooth can cause that chain slap since it got misaligned by just moving the cas?

[wangan_cruiser]

here's the video of the play.



Picture004-1.flv video by wangan_cruiser - Photobucket (http://s585.photobucket.com/albums/ss295/wangan_cruiser/?action=view&current=Picture004-1.flv)

[VNG704]

If you look at the screw, put it in the hole of the guide. You'll see why it wobbles. There is room for play, that is why. Mine does the same thing. It is completely new. Unless you AND I are missing some sort of washer or some mysterious part from the timing chain kit, it's supposed to be like that. So the noise you're hearing is coming from somewhere else. Install it right? Look into somewhere or something else like perhaps shims or lifters like someone said. Did you make a recording of the sound with the motor running before you took it apart?

[wangan_cruiser]

i did use a mechanic's stethoscope to located the noise where it was coming from and had a friend mechanic to come out and check it in person and he said it cant be my lifters or a rod knock.

i checked my lifters and theres no play. ill rebleed the lifters since my camshafts are off too.

so did u have that rattle too as well? i think i saw your post on nico.


hey man do u have aim?


contact me on iori31

lets get this thing fix!

[weissguy]

That guide does wobble some on any sr20 motor. It shouldn't be causing your noise. What made him say it wasnt rod knock or tapping in the head? Where did he say the noise was coming from? does the noise get worse or better with RPM?

[VNG704]

i did use a mechanic's stethoscope to located the noise where it was coming from and had a friend mechanic to come out and check it in person and he said it cant be my lifters or a rod knock.

i checked my lifters and theres no play. ill rebleed the lifters since my camshafts are off too.

so did u have that rattle too as well? i think i saw your post on nico.


hey man do u have aim?


contact me on iori31

lets get this thing fix!
I did have a rattle but I haven't put the motor back in. Doing some upgrades and preventative maintenance so I'm waiting on a certain part this weekend. So I don't know if I can help you but checked aim and you weren't on. Not sure if your rattle is same as mine. Mine came in at a certain rpm and then went away at higher rpm(or maybe I couldn't hear it at high rpms). As weissguy was asking: why not rod knock? etc... details details!

[wangan_cruiser]

im putting everything back tomm.

well when i rev it it comes i think noise goes higher with the rev.


my friend who is a mechanic even verified it that it wasnt a rod knock.

we did troubleshooted it and at first it turns out to be a tensioner problem. like my original post same exact thing happened.

so ill keep you guys posted after i finish putting everything back.