Engine cold Start noise

Faults and Technical chat for the Mazda CX-3
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1Monty
Posts: 195
Joined: Mon Nov 06, 2017 5:13 pm
Location: Essex

Engine cold Start noise

Post by 1Monty » Mon Nov 06, 2017 5:19 pm

Picked up new CX3 yesterday from dealer. Well I say 'new' when in fact it's a X demo with 835 on the clock.

I have noticed the engine is noisy when starting from cold. It sounds like a bag of nails for a minute or two then quietens down. This can't be normal so have booked it in to be investigated.

Anyone else having this issue?
SINCE FEB 2018 I NO LONGER OWN VEHICLE
CX-3 Sport Nav - 2.0L Petrol - 2017 - Manual - 2WD - Eternal Blue Metallic - Half Leather - 44.3mpg on a good day down hill with a strong wind behind 😎


Gus
Posts: 607
Joined: Sun Jul 12, 2015 7:11 am
Location: Oxfordshire

Re: Engine cold Start noise

Post by Gus » Mon Nov 06, 2017 6:08 pm

Welcome, give us a sniff of a clue please Petrol or Diesel?
CX-3, Sport Nav, Auto, Petrol, Soul Red Metallic, Half Stone Leather, Sep 2015 to Sep 2018.
CX-5, Sport Nav+, Auto, Petrol, Soul Red Crystal Metallic, Sep 2018.


1Monty
Posts: 195
Joined: Mon Nov 06, 2017 5:13 pm
Location: Essex

Re: Engine cold Start noise

Post by 1Monty » Mon Nov 06, 2017 6:20 pm

Thank you Gus.

Sorry about that, was just about to add that it is a 2.0 Ltre petrol Sport Nav.
SINCE FEB 2018 I NO LONGER OWN VEHICLE
CX-3 Sport Nav - 2.0L Petrol - 2017 - Manual - 2WD - Eternal Blue Metallic - Half Leather - 44.3mpg on a good day down hill with a strong wind behind 😎


Gordongilchrist
Posts: 76
Joined: Fri Jan 20, 2017 11:20 am
Location: N Ireland

Re: Engine cold Start noise

Post by Gordongilchrist » Mon Nov 06, 2017 6:38 pm

Completely normal. The syyactive engine is trying to get heat to the catalytic convertor due to high thermal efficiency of engine n torturous exhaust header pipes. Best not to drive for 10 seconds r so. Unless u want to change catalytic converter early
2017 Mazda CX-3 sport nav 2WD Automatic 120 petrol in white :)


1Monty
Posts: 195
Joined: Mon Nov 06, 2017 5:13 pm
Location: Essex

Re: Engine cold Start noise

Post by 1Monty » Mon Nov 06, 2017 6:43 pm

Thanks for your reply Gordon. I'll still get it checked out just for my own piece of mind.

So far enjoying the car. Looks the business and nippy with it. Not that I'm a speed freak at my age 😉
SINCE FEB 2018 I NO LONGER OWN VEHICLE
CX-3 Sport Nav - 2.0L Petrol - 2017 - Manual - 2WD - Eternal Blue Metallic - Half Leather - 44.3mpg on a good day down hill with a strong wind behind 😎


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rockposer
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Joined: Wed Mar 09, 2016 10:47 am
Location: Kent Alps
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Re: Engine cold Start noise

Post by rockposer » Mon Nov 06, 2017 7:16 pm

It does like to keep the revs quite high on start up which is quite unusual compared with other cars.

I do get some funny looks sometimes as if I'm revving it like an old banger
Land Rover Discovery Sport HSE Black Edition


tyrfelin
Posts: 321
Joined: Sun Jan 29, 2017 3:26 pm

Re: Engine cold Start noise

Post by tyrfelin » Mon Nov 06, 2017 8:19 pm

PERFECTLY NORMAL for a matter of 20 seconds!
Sport Nav 2.0 Snowflake White


Jroper
Posts: 8
Joined: Tue Nov 07, 2017 2:39 am
Location: Peoria, Illinois, US

Re: Engine cold Start noise

Post by Jroper » Tue Nov 07, 2017 2:50 am

2017 CX-3 Sport, Auto, AWD


1Monty
Posts: 195
Joined: Mon Nov 06, 2017 5:13 pm
Location: Essex

Re: Engine cold Start noise

Post by 1Monty » Tue Nov 07, 2017 7:05 am

Thanks everyone.

I use to be a mechanic many years ago and appreciate that engines and technology change and engines can fast idle fairly high from cold. This is due to the oxygen sensor on the exhaust manifold down pipe picking up the ambient temperature of the engine and sending this information to ECU (electronic control unit) which in turn sets the engine fast idle speed until the engine has warmed up to a sufficient temperature and then reduces to its normal level. But in all my years I have never heard what I can only describe as a type of clattering/bearing whining noise coming from my engine at cold start. But, if my Mazda dealer tell me this is normal after inspection then so be it, but until then I'm afraid I remain sceptical.
SINCE FEB 2018 I NO LONGER OWN VEHICLE
CX-3 Sport Nav - 2.0L Petrol - 2017 - Manual - 2WD - Eternal Blue Metallic - Half Leather - 44.3mpg on a good day down hill with a strong wind behind 😎


tyrfelin
Posts: 321
Joined: Sun Jan 29, 2017 3:26 pm

Re: Engine cold Start noise

Post by tyrfelin » Tue Nov 07, 2017 8:58 am

Ours is a petrol - the revs die down fairly quickly but there's no CLATTERING sound to be honest.
Sport Nav 2.0 Snowflake White


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