How to know you have a Rod Knock?

[Turbo Habanero]

Since i cant tell much from your video. Just to rule out one possibility does it sound anything like this?

http://smg.photobucket.com/albums/v436/Cobra281s/?action=view&current=MOV00238.flv

Yes not as loud sometimes but yes

 

[JDMMA70]

Id do the test IJ suggested anyways just in case. But from what youre telling me, it sounds like incorrect valve clearances. You can check them following the TSRM, and reshim as needed, then it should quiet it down quite a bit.

 

[Turbo Habanero]

Id do the test IJ suggested anyways just in case. But from what youre telling me, it sounds like incorrect valve clearances. You can check them following the TSRM, and reshim as needed, then it should quiet it down quite a bit.

Its not as loud as that tap but sounds very close just alot more quite

 

[lewis15498]

You would likely get better audio quality if you took the car out of the garage. +2 for doing Ian's test, its a good idea to rule out the rod knock first, as thats the one that could destroy the engine fast.
Also theres like 1.2 million youtube vids of rod knock including many supras. Most will sound more severe, but it will give you a better idea what to listen for.

 

[IJ.]

Its not as loud as that tap but sounds very close just alot more quite

JUST DO THE FUCKING TEST AND STOP GUESSING....

arghhhh

I swear some of you kids are fucking hubcaps at times..

 

[Turbo Habanero]

Has your idle oil pressure decreased?

Try pulling an injector clip at a time with it idling and see if the tap changes, replace clip and repeat down the engine.

Im ashamed to say i wouldnt even know how to go about this....

 

[enjoi.this]

So will it run really rough and will you feel lack of power pretty noticeably

No, I said it will sound like one. From your video it sounds like noise from the valvetrain. Rod knock is pretty distinguishable as it litterally goes "KNOCK KNOCK KNOCK"

It will make that sound faster when you rev it up, and slower at idle. The knock will get louder too when your revving it.

 

[Turbo Habanero]

You would likely get better audio quality if you took the car out of the garage. +2 for doing Ian's test, its a good idea to rule out the rod knock first, as thats the one that could destroy the engine fast.
Also theres like 1.2 million youtube vids of rod knock including many supras. Most will sound more severe, but it will give you a better idea what to listen for.

ok. The car is not in a garage covered car port but the fan is really loud on it.

 

[jdub]

JUST DO THE FUCKING TEST AND STOP GUESSING....

arghhhh

I swear some of you kids are fucking hubcaps at times..

 

[Turbo Habanero]

No, I said it will sound like one. From your video it sounds like noise from the valvetrain. Rod knock is pretty distinguishable as it litterally goes "KNOCK KNOCK KNOCK"

It will make that sound faster when you rev it up, and slower at idle. The knock will get louder too when your revving it.

when it is running/reving its not even noticeable.

 

[lewis15498]

Im ashamed to say i wouldnt even know how to go about this....

Your fuel injectors (between the cyl head and fuel rail) Have clips (electrical plugs) removing one will sever the signal that tells that injector to fire (inject fuel) Doing this will stop combustion in that cylinder, and if the noise is a rod knock coming from that cylinder, the noise will stop or change. do this one cylinder at a time, and if the noise changes or stops that cylinder has a rod knock.

 

[lewis15498]

when it is running/reving its not even noticeable.

??????
If its not noticable when running then when is it noticable?

 

[Turbo Habanero]

Your fuel injectors (between the cyl head and fuel rail) Have clips (electrical plugs) removing one will sever the signal that tells that injector to fire (inject fuel) Doing this will stop combustion in that cylinder, and if the noise is a rod knock coming from that cylinder, the noise will stop or change. do this one cylinder at a time, and if the noise changes or stops that cylinder has a rod knock.

o ok :icon_bigg

 

[JDMMA70]

??????
If its not noticable when running then when is it noticable?

I guess he means when the car is actually moving, i dont notice my valve tick when im driving around.

 

[Turbo Habanero]

??????
If its not noticable when running then when is it noticable?

i meant running as in driving down the road. It is noticeable at idle

 

[lewis15498]

i meant running as in driving down the road. It is noticeable at idle

Ok, then its audible at idle, but not under load. Likely valvetrain noise, check your valve clearance first, you dont have to run the engine to do that.

HOW? Its in the TSRM.

 

[Turbo Habanero]

Ok, then its audible at idle, but not under load. Likely valvetrain noise, check your valve clearance first, you dont have to run the engine to do that.

HOW? Its in the TSRM.

ok i just did Ian's test and the noise never changed from the tap tap tap.

i do not have the TSRM but i i think i have seen people post links to it around so i will find it.

 

[lewis15498]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/

 

[Turbo Habanero]

thank you lewis

 

[Turbo Habanero]

Thanks Everyone for your its very much appreciated :icon_bigg