Low rumbling engine noise!

13th April 2013, 22:09

I just noticed when driving a low pitch rumbling noise coming from my engine, it is stock and I haven't done any modifications to my engine but it sounds like I have put and induction kit on it! It is worrying and I don't want to drive on it. Has anyone had a similar problem or knows what it could be? My car is a 1.1 forte 2002. Thanks Joe

13th April 2013, 23:06

Oh dear, rumbling is one potential sign of worn big end bearings (either conrod or crankshaft bearings). that's worst case scenario.

Does the car knock at all on startup, any tapping at all? does the oil pressure warning light go out straight away or does it stay on for a few seconds after starting?

It's definitely your engine? no change with the clutch in or out in neutral or gear?

Does the noise change when you put your foot down, you said it sounds like an induction kit maybe you have a blowing exhaust?

the most important question of all, do you have enough oil and is it the right grads (10W40 semi synthetic)

13th April 2013, 23:26

Quote:

Originally Posted by MartinObviously

Oh dear, rumbling is one potential sign of worn big end bearings (either conrod or crankshaft bearings). that's worst case scenario.

Does the car knock at all on startup, any tapping at all? does the oil pressure warning light go out straight away or does it stay on for a few seconds after starting?

It's definitely your engine? no change with the clutch in or out in neutral or gear?

Does the noise change when you put your foot down, you said it sounds like an induction kit maybe you have a blowing exhaust?

the most important question of all, do you have enough oil and is it the right grads (10W40 semi synthetic)

All these are big factors, look into them ASAP!

14th April 2013, 00:11

Quote:

Originally Posted by MartinObviously

Oh dear, rumbling is one potential sign of worn big end bearings (either conrod or crankshaft bearings). that's worst case scenario.

Does the car knock at all on startup, any tapping at all? does the oil pressure warning light go out straight away or does it stay on for a few seconds after starting?

It's definitely your engine? no change with the clutch in or out in neutral or gear?

Does the noise change when you put your foot down, you said it sounds like an induction kit maybe you have a blowing exhaust?

the most important question of all, do you have enough oil and is it the right grads (10W40 semi synthetic)

Thanks for your suggestions,

It's quite a strange noise and it doesn't sound like a mechanical problem, it's like the whole noise of the engine has just been made to sound deeper so possibly something to do with the exhaust?

14th April 2013, 00:19

Quote:

Originally Posted by Joe7

Thanks for your suggestions,

It's quite a strange noise and it doesn't sound like a mechanical problem, it's like the whole noise of the engine has just been made to sound deeper so possibly something to do with the exhaust?

blowing exhaust yeah

14th April 2013, 12:51

Quote:

Originally Posted by Joe7

Thanks for your suggestions,

It's quite a strange noise and it doesn't sound like a mechanical problem, it's like the whole noise of the engine has just been made to sound deeper so possibly something to do with the exhaust?

Well that should be nice and easy to check

Exhaust blows can happen quite suddenly.

If you don't have ramps or axle stands, driving up on the kerb should give you enough clearance to get underneath. IF it's blowing it's most likely at a joint or a clamp, start with the back box. that's where mine went the first time around on my last 106.

When you said rumbling, I thought you meant like a bearing kind of rumbling

14th April 2013, 19:10

I had a look at the whole exhaust today and there's a connection at the front underneath the engine is think is call the lambda that had broken off so I welded it back on and put sealant paste round it and now it's running fine, thanks to everyone who posted a reply much appreciated

14th April 2013, 22:41

Quote:

Originally Posted by Joe7

I had a look at the whole exhaust today and there's a connection at the front underneath the engine is think is call the lambda that had broken off so I welded it back on and put sealant paste round it and now it's running fine, thanks to everyone who posted a reply much appreciated

Did you not have an engine management light on? lol

15th April 2013, 18:51

Quote:

Originally Posted by MartinObviously

Did you not have an engine management light on? lol

No I didn't funnily enough, should I have done?

15th April 2013, 19:03

Quote:

Originally Posted by Joe7

No I didn't funnily enough, should I have done?

If it was blowing at the lambda, I'd have expected the Engine management light to come on

nevermind haha!

Main thing is you've sorted it.

16th April 2013, 13:57

Nah it won't come on if it's blowing around there, if you unplug it or take it out it might come on. I ran mine with no sensor and no light came on as long as it was plugged in.

16th April 2013, 14:04

Ive now unplugged mine and still no light!

16th April 2013, 14:05

Hahaa don't complain dude

On the other hand are you sure there's a bulb in it? Lol