Engine Idle Sound - Puma

**CapeLandy** · 8th September 2009, 12:49 AM

Do you guys have this rattle sound at idle once fully warmed.
Sounds like an intermittent combustion rattle but is not always there. It is less when I am running 200ml of two stroke oil in the diesel.
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**Grockle** · 8th September 2009, 01:03 AM

Could be the piston jets sticking.

**CapeLandy** · 8th September 2009, 02:35 AM

sounds quite high up in the chamber. Are the jets near the top?

**dullbird** · 8th September 2009, 08:10 AM

I can't make the sound out as it sounds like you have wind noise in your camera when filming like your standing to close to the fan or something

**BilboBoggles** · 8th September 2009, 08:49 AM

Whatever you don't mention the 2 stroke oil to Land Rover! Only thing I can hear is a slight unevenness to the idle. Mine started doing this due to a contamination. If you raise the revs to 1000RPM does it surge?

**TimNZ** · 8th September 2009, 09:07 AM

Form the video its a bit hard to tell, but sounds ok. My 110 tends to differ in noise depending on where I buy fuel. Is it quieter if the clutch is depressed, (could be the clutch rattling)? Also after the engine reaches about 54degC the EGR valve starts to operate which could make it sound noiser.

Tim

**PAT303** · 8th September 2009, 03:12 PM

I think all of you should get used to common rail engines,the reason for alot of the noise in CM engines is because of the high injector pressure causes the fuel to burn rapidly,the advantage they have over other types,and that extra ''bang'' you get for a given amount of fuel is what makes the noise.All CM engines I have worked on have the distinctive rattle. Pat

**Huwmungus** · 8th September 2009, 08:17 PM

I agree with Pat- we have a variety of Common rail vehicles at work. Rangers, Colorados, Hilux's, land cruisers. They all "rattle" differently to old school diesels. It's just the way the newer motors are. I think a lot of "problems" with the Puma motor are just people unfamiliar with CR motors.

**dgardel** · 8th September 2009, 08:47 PM

Originally Posted by BilboBoggles

Whatever you don't mention the 2 stroke oil to Land Rover! Only thing I can hear is a slight unevenness to the idle. Mine started doing this due to a contamination. If you raise the revs to 1000RPM does it surge?

Water Contaminetion? solution(s)?

Thanks

Daniele

**dullbird** · 8th September 2009, 09:31 PM

Originally Posted by Huwmungus

I agree with Pat- we have a variety of Common rail vehicles at work. Rangers, Colorados, Hilux's, land cruisers. They all "rattle" differently to old school diesels. It's just the way the newer motors are. I think a lot of "problems" with the Puma motor are just people unfamiliar with CR motors.

not my problems unless you would consider 3 limp modes in one week normal for a common rail diesel

.....2 of them on the same day!

Still i have always thought the puma sounded different.........I have also always thought this is what they sound like.

Still this is the first post I have seen complaining about what they sound like, so what other problems are you referring to that are common to moden day diesels? bad clutch? failing vacuum pumps? failing diffs? turbo heat shield bolts falling out water contamination due to poorly placed components, faulty EGR........These are some of the most common faults and things I hear people complain about I wouldn't say that these are all due to people not knowing what a common rail diesel sounds like.

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