exhaust/manifold issues

olly22n · 06-11-2011, 06:21 PM

Hi guys.

My car now sounds like a tractor, and the noise seems to be coming from the exhaust manifold.

Are they known to crack? The car is now running like a bag of nails at low rpm/part throttle. It is fine once the revs are up and there are no warning lights, oil is fine, no funny smells etc etc...

Any ideas?

**AlexGTT** · 06-11-2011, 06:37 PM

Very rare. The manifolds are excellent quality. Are you sure it's not a joint further onto downpipe?

olly22n · 06-11-2011, 06:46 PM

Had my hands round the join to the cats, nothing there, and the noise is coming from further towards the engine.

olly22n · 06-11-2011, 06:51 PM

reading this http://www.cslregister.com/forum/sho...327#post101327

thread, could it be a coil pack? It clears itself the higher up the rev range you go. Worst at tickover (both noise and misfire/hesitation).

It came on suddenly, it went from perfect to borked in a blink of an eye

shane@mbtech · 06-11-2011, 07:49 PM

If your car is misfiring it will make the exhaust sound noisier.

Get your car checked ASAP and dont drive it in between.

A misfire can have many origins, a coilpack being one.

Other possibilities are head gasket issues- which seem very popular at present.

Where are you based? If you're local I will take a quick gander for free.

olly22n · 06-11-2011, 07:56 PM

Quote:

Originally Posted by lawsy

If your car is misfiring it will make the exhaust sound noisier.

ok, explains that then.

Quote:

Originally Posted by lawsy

Get your car checked ASAP and dont drive it in between.

A misfire can have many origins, a coilpack being one.

Other possibilities are head gasket issues- which seem very popular at present.

Had to drive it 8 miles home, but that was extremly gently, need to drive it 4 miles tomorrow to the garage. WIll that be ok?

Quote:

Originally Posted by lawsy

Where are you based? If you're local I will take a quick gander for free.

stamford lincs chap, miles from warrington.

One other thing, the car changing instantly while driving, would a coil pack/headgasket go just like that?

06-11-2011, 06:21 PM	#1
olly22n S3 - On the open road Join Date: Aug 2011 Posts: 109 Casino cash: $1519	exhaust/manifold issues Hi guys. My car now sounds like a tractor, and the noise seems to be coming from the exhaust manifold. Are they known to crack? The car is now running like a bag of nails at low rpm/part throttle. It is fine once the revs are up and there are no warning lights, oil is fine, no funny smells etc etc... Any ideas?

06-11-2011, 06:37 PM	#2
AlexGTT CSL Register Uber-poster! Join Date: Apr 2008 Location: Herefordshire Posts: 4,374 Casino cash: $8572	Very rare. The manifolds are excellent quality. Are you sure it's not a joint further onto downpipe? __________________ CSL Register Alcoholics Anonymous Group Leader & Businessman of the Year '93! www.earleyengineering.com

06-11-2011, 06:46 PM	#3
olly22n S3 - On the open road Join Date: Aug 2011 Posts: 109 Casino cash: $1519	Had my hands round the join to the cats, nothing there, and the noise is coming from further towards the engine.

06-11-2011, 06:51 PM	#4
olly22n S3 - On the open road Join Date: Aug 2011 Posts: 109 Casino cash: $1519	reading this http://www.cslregister.com/forum/sho...327#post101327 thread, could it be a coil pack? It clears itself the higher up the rev range you go. Worst at tickover (both noise and misfire/hesitation). It came on suddenly, it went from perfect to borked in a blink of an eye

06-11-2011, 07:49 PM	#5
shane@mbtech CSL Register Uber-poster! Join Date: Feb 2009 Location: warrington Posts: 5,419 Casino cash: $19783	If your car is misfiring it will make the exhaust sound noisier. Get your car checked ASAP and dont drive it in between. A misfire can have many origins, a coilpack being one. Other possibilities are head gasket issues- which seem very popular at present. Where are you based? If you're local I will take a quick gander for free.