06 Mustang GT [Noise under valve cover]

[Samos3]

That noise at 32 seconds, was it the loud single 'clack'?

 

[Moccubus]

Yes

 

[Samos3]

Hmmm...interesting.

 

[Moccubus]

Hmmm...interesting.

It's a confusing noise only way I'll know is when I take the cover off this week end I don't think it will make any sense otherwise.

 

[Samos3]

It almost sounds like a solenoid/relay click.

 

[Moccubus]

It almost sounds like a solenoid/relay click.

Wonder if it could be my vct solenoid I bought them off American muscle and realize they are dorman (ie junk)

 

[JC SSP]

Swap the VCT and see if the noise transfers to the passenger side.

 

[Moccubus]

Swap the VCT and see if the noise transfers to the passenger side.

Yeah I'll have to do that, those vct solenoids seemed junky I installed brand new ones on both sides I shoulda just bought OEM if it ends up being that imma be flabbergasted.

 

[Samos3]

Yeah I'll have to do that, those vct solenoids seemed junky I installed brand new ones on both sides I shoulda just bought OEM if it ends up being that imma be flabbergasted.

Might be able to tell by disconnecting them both. If unplugged they should not make a noise? But I have to say, I don't know if the vct solenoids make any noise ever. I was thinking something external, but on that side of the motor.

Another, BUT.....a single rocker or a bad adjuster making that noise every now and then might sound just like that. The clack could very well be that noise inside the hollow die-cast valve cover. I have tapped on a valve cover that wasn't on the motor and it had a similar tone or resonate to it. Different than regular aluminum.

 

[Moccubus]

Might be able to tell by disconnecting them both. If unplugged they should not make a noise? But I have to say, I don't know if the vct solenoids make any noise ever. I was thinking something external, but on that side of the motor.

Another, BUT.....a single rocker or a bad adjuster making that noise every now and then might sound just like that. The clack could very well be that noise inside the hollow die-cast valve cover. I have tapped on a valve cover that wasn't on the motor and it had a similar tone or resonate to it. Different than regular aluminum.

Yeah I'm puzzled, it always sounded like it was the exhaust to me but not sure when I pull the cover I'll check the rockers, anyone know if it's easy to tell ? I imagine they'd be lose or worn looking than the others. Not entirely sure how to verify if one is bad probably won't be functional like the rest but the noise is so inconsistent, for the whole drive it didn't make a peep.

 

[Samos3]

If its st

Yeah I'm puzzled, it always sounded like it was the exhaust to me but not sure when I pull the cover I'll check the rockers, anyone know if it's easy to tell ? I imagine they'd be lose or worn looking than the others. Not entirely sure how to verify if one is bad probably won't be functional like the rest but the noise is so inconsistent, for the whole drive it didn't make a peep.

If its sticky needle bearings, it might be hard to tell in place. The roller is always in contact with the cam lobe (should be!). A bad adjuster would allow for the rocker to bounce around and might be pretty obvious. If you push down on the adjuster side of the rocker it shouldn't really move. Push down really slow and the adjuster plunger will compress.

The inconsistency probably points to sticky needles. A fully bad rocker would look torn up, so would that cam lobe and make noise all the time.

 

[Kev555]

It almost sounds like when you pop a roller into place? id inspect under that cover. Is that whining sound towards the end of the video (bit like a siren) from the engine? or a background noise?

 

[Moccubus]

It almost sounds like when you pop a roller into place? id inspect under that cover. Is that whining sound towards the end of the video (bit like a siren) from the engine? or a background noise?

Background noise, I'll be changing all the rollers and lash adjusters if I find anything abnormal. Just trying to fully understand what I might be looking at needing to do, car runs so good it's confusing but I'm also switching back to 5w-30 because I felt like the car exhibitted a lot less noises and felt smoother on that oil thickness

 

[Kev555]

Background noise, I'll be changing all the rollers and lash adjusters if I find anything abnormal. Just trying to fully understand what I might be looking at needing to do, car runs so good it's confusing but I'm also switching back to 5w-30 because I felt like the car exhibitted a lot less noises and felt smoother on that oil thickness

Yes have always run on 5/30 before and after I overhauled the engine last year. It purrs so quiet I just sit and listen to it with the bonnet open sometimes for tranquillity

 

[Samos3]

Yes I run on 5/30 and after I overhauled the engine last year. It purrs so quiet I just sit and listen to it with the bonnet open sometimes for tranquillity

They call that 'motortation'.

 

[whitmanink]

in that video , was the engine running?

if so , im going with its electrical (solenoid or some electric that clicks

if that were a bad bearing on the roller follower it would make that noise all the time, constantly.
not to mention if it was stuck it would prolly cause issues running .

maybe ,, just maybe a bearing on a roller follower has a lot of play and every now and again it kicks to one side making that noise ( if thats the case it will throw the roller follower sooner than later ..)
so regardless id crack open the valve covers and make sure all is good to be safe,..

 

[Moccubus]

in that video , was the engine running?

if so , im going with its electrical (solenoid or some electric that clicks

if that were a bad bearing on the roller follower it would make that noise all the time, constantly.
not to mention if it was stuck it would prolly cause issues running .

maybe ,, just maybe a bearing on a roller follower has a lot of play and every now and again it kicks to one side making that noise ( if thats the case it will throw the roller follower sooner than later ..)
so regardless id crack open the valve covers and make sure all is good to be safe,..

Engine was off in video, with engine on it doesn't do that 99.9% of the time. Car is parked till I pull the cover and imma if it's not obvious run the car with the cover off to identify the issue. P sure it's a roller follower so imma replace all of them and lash adjusters to be safe.

 

[whitmanink]

Engine was off in video, with engine on it doesn't do that 99.9% of the time. Car is parked till I pull the cover and imma if it's not obvious run the car with the cover off to identify the issue. P sure it's a roller follower so imma replace all of them and lash adjusters to be safe.

The engine off .. no way it's a roller follower ..
It makes no sense how it could click when the engine isn't on?
Unless the pressure of the cam lobe pressing the roller follower makes it kick or move once the compression bleed off some?

I'd still remove the valve covers just to be sure u won't destroy the engine . But it seems odd it does it with the engine off ..

To be safe id remove the valve covers and hand crank the engine and just make sure the roller followers are sitting still and nothing is amiss

 

[Moccubus]

The engine off .. no way it's a roller follower ..
It makes no sense how it could click when the engine isn't on?
Unless the pressure of the cam lobe pressing the roller follower makes it kick or move once the compression bleed off some?

I'd still remove the valve covers just to be sure u won't destroy the engine . But it seems odd it does it with the engine off ..

To be safe id remove the valve covers and hand crank the engine and just make sure the roller followers are sitting still and nothing is amiss

Yeah it confuses the fk outta me bc of that, soon enough we will all know I got no idea what it truly is either, I won't be driving her till I know.

 

[Samos3]

Engine was off in video, with engine on it doesn't do that 99.9% of the time. Car is parked till I pull the cover and imma if it's not obvious run the car with the cover off to identify the issue. P sure it's a roller follower so imma replace all of them and lash adjusters to be safe.

If the car wasn't running, its 99.99999% certain it is not a rocker or adjuster.
Had the car been running prior to recording? If not, 100% its not rocker or adjuster.
Make sure your hvac is all set to 'off'. There is only a couple things under the hood that might make that noise.