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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-10-2017, 05:15 PM   #1
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Join Date: Apr 2017
Location: Northampton
Posts: 2
My Ride: E46 320i msport 4dr
E46 320 msport - blowing/popping noise when warm

Hi guys, this is my first post on here, so let's hope we can solve the mystery!

I have recently purchased a 2004 e46 320i Msport saloon (129k on the clock), it has just been through (and passed) an MoT.

It drives really well and on the whole, I am pleased with it... but... it may have developed a problem...

When I drive it for 10/15 mins or more (so when warmed up) at motorway speed (70ish) and I accelerate, It makes a blowing / gurgling (like as if you have a hole in your exhaust or the sound I imagine a scooby Impreza makes!) if i let it decelerate naturally in gear, it makes a popping noise (not loud but noticeable)... I have had the exhaust checked today and the guy said it's fine.

The car is not affected in anyway, so no loss in power/acceleration, no warning lights, no smoke from the exhaust...

Any ideas? Thanks all in advance.
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Old 04-10-2017, 07:56 PM   #2
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Join Date: Jan 2015
Location: Oregon City Oregon
Posts: 560
My Ride: 99 328i, 00 Z3 2.8
Don't drive it again until you inspect your DISA.
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Old 04-11-2017, 05:37 PM   #3
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Join Date: Apr 2017
Location: Northampton
Posts: 2
My Ride: E46 320i msport 4dr

Originally Posted by SSchwab View Post
Don't drive it again until you inspect your DISA.
Thanks Sschwab, Mtek in Northampton suspect it's associated with the manifold - going in tomorrow for a 'once over' so fingers crossed!
Zahir_d is offline   Reply With Quote

blowing, e46, exhaust, gurgling, popping

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