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- Long Zheng
October 15, 2007, 2:41 am
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when the engine is idling a few seconds after ignition. It sounds like
the normal engine "cluk" sound but five times as loud.
I've heard similar noises before when doing a tight corner, but only
yesterday when we switched on the air conditioning, this problem has
become much worse and wouldn't go away.
At higher revs, the sound seems to fade away but immediately returns
when you idle again. There's no smoke and no apparent loss of power.
Everything's okay except the noise, except I'm afraid it's doing
damage somewhere.
We've already replaced the engine oil filter and oil just in case it
wasn't circulating properly, but it hasn't had any effects.
Anyone have any ideas? We have a bit of experience with the mechanics
of petrol cars, but not diesel engines.
Re: Freelander loud banging noise at idle
Okay. Seemed to have identified the cause.
One of the transmission pulleys seems to be loose, which is causing
the transmission belt to shift around. The pulley becomes unbalanced
and starts knocking the side once in a while. At higher revs, it
balances better, thus, no noise. Will get a mechanic to unload the
belt from the pulley to test if this is indeed the cause.
Re: Freelander loud banging noise at idle
Transmission? Don't think so. Landrovers, even the Freeloader aren't
fitted with belt transmission. I think you might be describing what is
historically referred to as the fan belt. These days it often drives the
alternator, power steering, air conditioning and water pumps also
sometimes the cooling fan.
--
Wisdom and experience come with age, they say, but I wish I could
remember the darn question
Re: Freelander loud banging noise at idle
Hmm that sounds suspiciously as if somebody has replaced the timing belt
and not locktited and torqued everything up correctly any bets its the
bottom crankshaft pulley that is the culprit? That being said the idler
on the RRC was doing similar and sounded like ballbearings in a biscuit tin.
Derek
( back to just one landy )
Re: Freelander loud banging noise at idle
goodness that sounds far too sane to me how do they think the main agents
are going to make money off the Freeloaders if they don't get to change
timing belts ? :-)
ah but then they did put a belt on the 1.8 petrol engine and on the 2litre
diesel
so that must be enough for them.
Derek
Re: Freelander loud banging noise at idle
bloody nearly everything is, especially diesels.
to be fair, the only ford which had major belt issues was the 1.8 CVH,
AFAIK. And some things with chains have problems. Although one of those
was the 2.4 duratorq as fitted now to defenders...
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------\
>> http://www.schlockmercenary.com/ << \ ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!
Re: Freelander loud banging noise at idle
On Oct 21, 5:53 pm, Austin Shackles
Sorry, forgot to update.
GbH is right, it's a fan belt, not transmission.
The mechanic confirmed and fixed the problem.
One of the lowest pulleys (I think it was for the air cond) had its
rubber seals all eroded and shredded from the inside. When it span, it
would wobble since it was unbalanced. This in turn caused the metal
bits of the pulley to bang against other surfaces causing the
consistent banging sound. Of course, after you took off the
transmission belt, problem went away.
Still, it wasn't cheap.
Re: Freelander loud banging noise at idle
Sorry, forgot to update.
Yeah the mechanic confirmed and fixed the problem.
One of the lowest pulleys (I think it was for the air cond) had its
rubber seals all eroded and shredded from the inside. When it span, it
would wobble since it was unbalanced. This in turn caused the metal
bits of the pulley to bang against other surfaces causing the
consistent banging sound. Of course, after you took off the
transmission belt, problem went away.
Still, it wasn't cheap.
Re: Freelander loud banging noise at idle
If it is, the OP wants to get it seen to sharpish, before the crank gets
beyond repair. They'll go for a while rattling away (mine did) but when
they go too far, it's new crank time.
--
Rich B
Bandit 1200S
Take out the obvious to email me.
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