https://m.youtube.com/shorts/ttkzekjENek
The rattle is inconsistent.. most of the time it rattles but sometimes it doesn’t. Only rattles for a second and goes away. No sounds when driving. Only start up.
This is the only video proof I have of the sound. I heard maybe my timing chains or going. I’ve already heard about the solenoid but I’m told the 03’ STR doesn’t have a VVT solenoid.
My car is a 2003 Jaguar S Type R
And I have around 117k miles. The car has been ratting for over 3K miles
I use the original Castrol Oil for my oils changed and Jaguar filter.
PVC valve and PCV are new (Someone suggested that for some reason).
Pleas Help. I think I made a thread before.

 

 

I actually cannot hear any rattle...
Thus, I can say only this:
I did have a start-up rattle (for about 10 sec at first start). I thought without investigating that is must be the well known timing chain guides, etc.
I swapped all that (and made a thread about that).
But the rattle was still there.
Actually only then I started to investigate, i.e. I opened the bonnet and held a big screwdriver only various points, while I had my ear on the grip of the screwdriver...
I found it: It was a catalyst! In one of then the entire interiour honey-comp structure had broken off internally.

Thus, try to find the location of the rattle by using a big screwdriver - as above - while someone else starts the car.

 

It’s at 2 seconds. Please turn the volume up and put the phone to your ear. I hear it easily. I’m not trying to be rude I just know I can hear the flutter/rattle sound.

It’s interesting you say that because I believe oke of my cats aren’t good. I just always felt that way. I may get new one’s or uprated 200 cell. Was it consistent everytime? The rattle. Also mine isn’t for 10 seconds, more like 1

And thank you for responding.

 

At 2 sec I hear something, which sounds like air-bubbles hitting a water-surface from underneath. I don't know, what that could be on a car - the only time I ever heard something like that on a car was on Chitty Chitty Bang Bang (I don't want to be funny here - it really sounds like it...):

Look for "Chitty Chitty Bang Bang Theme Song" on youtube - I tried to copy the link here, but it did not work.

My rattle caused by one of the catalysts was nearly every first start-up of the day - or after many hours of being parked even a second time on the same day. I found out that it was the catalyst with the screwdriver pressed onto the catalyst with the metal end and the handle on my ear.

 

I need to get myself a better video lol. I do appreciate the assistance greatly

 

What type of oil filter is installed? Some aftermarket oil filters don't have a valve to stop the filter draining whilst the engine is off.

 

We spoke before, I was using the MANN filter and I was using Liquid Molly, prior to our conversation. Next lil change I used a Jaguar Oil Filter (White with green decals) and the OEM Castrol oil. Still makes the noise.