Loud rattle sound - 986 boxster

[ooid]

The car just developed this rattle sound, when driving at low speed after warming up, 0-15 m.p.h.looks like coming from the back? I have driven about 150 miles today in motorway, the sound goes away completely while driving high speed and there is no other symptoms apart from this sound during stationary or low speed? The sound was also stopping or reducing while moving the steering during stationary but it does not help anymore. Video below;

https://www.youtube.com/watch?v=tIqlrQkd5BQ

Recently has an IMS update, new clutch+flywheel, and loads of major works in the engine.

PS: no change on the oil and coolant levels, no sign of overheating and etc. so far. Some suggest it might be rear shock absorbers or heatshield?

Any feedback would be great!

[mollytherocker]

Firstly, I would not be running that anymore!

Take it back to where you had the work done and get it checked out.

[ooid]

It's quite strange, the car is absolutely silent while driving. First I thought it has to do with steering, as while moving the steering slowly left-right at a traffic light, the noise was going away and it only develops after driving a few miles.

[Philemon]

Broken engine mount...?

[Ozone]

Ours does this, I think it's the heat shield above the exhaust rattling. I could be wrong, best to get it looked at if you're worried

[ooid]

Ozone said:

Ours does this, I think it's the heat shield above the exhaust rattling. I could be wrong, best to get it looked at if you're worried

If it's heat shield, I'm wondering how come the steering was affecting the noise while stationary? Well not anymore.

[gemini]

First thing if check out is the heat shield. They all go!

[edc]

ooid said:

If it's heat shield, I'm wondering how come the steering was affecting the noise while stationary? Well not anymore.

I would check anything running off the aux belt ie waterpump and PAS.

[ooid]

Thank you all.

Loads of things to be checked this weekend, (Water pump and power steering fluid has been checked already bu no leak)

Another strange observation, If the car is on a slope (seen below) the noise disappears. On motorway, it's absolutely silent though, I have not felt any strange reaction from clutch, or engine so far while driving.

[Orangecurry]

anonymous said:

[redacted]

Sorry to hear that - which engine does yours have?

[delays]

edc said:

I would check anything running off the aux belt ie waterpump and PAS.

This.

Equally, mine made a similar rattle (drowned out at speed by everything else) that turned out to be a loose heat shield clamp thing round one of the exhaust manifolds. 2 mins at the OPC FOC and it was solved.

[griffter]

anonymous said:

[redacted]

Nightmare
What are the symptoms?
How long since the rebuild?

[ooid]

Thanks all. It has been confirmed, Bloody heat shields!

To inform others for similar issue in the future, this could well be Water pump as cmoose suggested earlier but here are also some other possibilities;

1 - Rear Shock Absorbers
2 - Steering Pump
3 - Exhaust / CAT
4 - Water pump
5- Broken or loose engine mount

[mollytherocker]

ooid said:

Thanks all. It has been confirmed, Bloody heat shields!

To inform others for similar issue in the future, this could well be Water pump as cmoose suggested earlier but here are also some other possibilities;

1 - Rear Shock Absorbers
2 - Steering Pump
3 - Exhaust / CAT
4 - Water pump
5- Broken or loose engine mount

The heat shields? Thats a win in my book!

[cat721]

Hallo
I just had a very similar rattling noise in my 987 and as I was searching for symptoms of the IMS failing, I came across this post.
The noise comes and goes and I have only heard it when stationary 2 times. I explained it to the local official Porsche dealer and I just came back from the big service but they say they haven't heard anything and they checked it thoroughly. 
I'm very worried that the IMS might be failing but from what I understand this doesn't come and go it only gets worse so I'm hoping that the problem is a loose heat seal.
Can you advise me where about to look for a loose heat seal?
Can anyone tell me if the noise would come and go if it was an IMS failure?
Thank you

Edited by cat721 on Friday 23 February 20:30

[edc]

There are heat shields in the rear bumper corner recesses and over the cats.

[cat721]

Thank you I'll go and check them today!

[ooid]

jez, just remember posting this, totally scared the crap out of me back than!

This, indeed was catalytic converter heat shields. They sound super-scary, when they go. A good indy must have a look properly though, before deciding that, anything might go wrong in there, one never knows! If it's heat-shields, super simple cheap solution

[ooid]

anonymous said:

[redacted]

Hi cmoose, do you still have the red cayman? I think I saw you today near prior park. I was in friends 964 (weird purple-ish colour, with rusty wheels), just after we passed a nice black Mclaren.

[ooid]

Mad coincidence but somehow remembered your plate vaguely from the pics you post here! Glad, I was not in a Boxster or any convertible, so cold yesterday! There are some fun roads there, we drove around a bit Combe Hay. Hope to visit again maybe in summer,