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Popping from exhaust ??

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Old 19 February 2003, 09:05 AM
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Tony_W
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In the last week, I've noticed that after a good run (lots of grinning ) when the car is sat either on tick-over cooling down, or after I've turned it off...I can hear a popping noise from under the car. I presume it's the exhaust?
The only mod is a TSL back box. It sounds more like it's coming from the centre section.

Is there a cat (not a fluffy one ) there, and is this the noise as it's cooling down?

Ta

Tony

[Edited by Tony_W - 2/19/2003 9:05:47 AM]
Old 19 February 2003, 09:26 AM
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Riftzone
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sounds like unburnt fuel combusting in the heat. if there was a cat there, it's probably an ex-cat....
Old 19 February 2003, 09:31 AM
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petey
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Which means flames if it's tuned up enough

Old 19 February 2003, 12:01 PM
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Tony_W
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Has anyone else had this popping sound (Whilst the car is turned off !!)which lasts for a couple of minutes after switch off when the car is warm.
It isn't a continuous pop, every 10 15 secs you can hear it go POP..CRACKLE..and then silence for a while.
(It's not the normal ticking as things cool down after a quick run).

Tony
Old 19 February 2003, 12:22 PM
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Magic Boot
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Car Hiccups!!

Usual cause is gulping down of fuel too quickly, very common to the Scoob.

Old 19 February 2003, 12:28 PM
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Tony_W
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So if it's normal I can relax after a blast then?

It didn't do it this morning on the way to wrok, but then I did drive like a "normal commuter"...had to really...in a queue!!
Old 19 February 2003, 12:31 PM
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Tony_W
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So if it's normal I can relax after a blast then?

It didn't do it this morning on the way to work, but then I did drive like a "normal commuter"...had to really...in a queue!!
Old 19 February 2003, 01:16 PM
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Philip Attaway
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Could be the turbo's heat shield as it cools down. My classic used to make lots of noise after switching off.

Phil
Old 19 February 2003, 01:19 PM
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chrisp
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my old uk use to make weird noises but the funniest was when it rain and the water dripped onto the scoobsport exhaust rear pipe and it use to sizzle and a little puff of steam came off
Old 19 February 2003, 01:55 PM
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ScoobyDoo69
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dont forget when the metals get hot they expand, and when getting cooler they shrink again, so they sound like theyre cracking or popping, mines had it ever since i bought it, and i've heard it on my old Sierra too

ScoobyDoo69
Old 19 February 2003, 02:21 PM
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POC
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Question

every 10 15 secs you can hear it go POP..CRACKLE
Check to see if you have a leek anywhere, maybe something is dropping onto the hot exhaust?
Old 19 February 2003, 03:18 PM
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ian_sadler
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If the down pipe & centre pipe are still original then it'll most likley be the heat shields round the cats popping as they cool down.

Ian
Old 19 February 2003, 08:31 PM
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Tony_W
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Ta for the replies..

It's put my mind at rest.

I'll check for any leaks as well, although I'm pretty sure nothing is leaking as there's no stains on the garage floor (doubt if a leak would get burnt up by the exhaust without some drips hitting the floor)

will check though.

Ta

Tony
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