[JamesCameron1]

Check out my rattle... and hopefully you wont be as stumped as me


Please help! This ones driving me nuts!

 

[roadsternut]

My guess is look at the bracket securing the exhaust douwnpipe to the bellhousing.

 

[boogie van]

what rpm is it rattling at?

 

[JamesCameron1]

Not too sure. I will check later.

 

[the blue potato]

Check your heat shields on the downpipe and cat.

 

[JamesCameron1]

for the heat sheids are we talking the ones on the car?

 

[roadsternut]

for the heat sheids are we talking the ones on the car?

There are crimped heatshields on the exhaust downpipe, and on the cat; the crimped edges can often rust or burn through.

 

[djsqiigles]

your timing chain is smacking the inside cover.

 

[roadsternut]

your timing chain is smacking the inside cover.

I'd be amazed if a Miata has a timing chain; they have different engines in the US from the rest of the world?? :roll:

 

[acejoker]

my stock header heatshield makes a similar noise

 

[JamesCameron1]

i dont have a stock header... or cat :|

 

[JamesCameron1]

I didnt think this would cause a rattle but I could be wrong. What is this anyways and should I chop it off?

The stud touching the header.

 

[Funkdenomotron]

On my 91 the stock heatshield on the downpipe made alot of noise. On my 99 i put in the roadster sport midpipe, with a cat, and the welds on the cat are shite, And they rattle like sin. I have shoved little pieces of high temp rubber in between the can and its shield which remedied the problem....for 3 days. Now it rattles somewhere else on the cat's heat sheild. My next move is to......trade it for a mazdaspeed. But if I was not going to do that, I would take the heat shield off of the cat, or delete the cat.

 

[JamesCameron1]

turns out that it was the stud touching the header. the car delt with it itself on the way down my street.... looks like it vibrated to the point where it snapped off