triton 4m41 engine noise (cicada)

Submitted: Thursday, Jul 07, 2016 at 12:41
ThreadID: 132936 Views:4521 Replies:4 FollowUps:1
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Hi all,

I am experiencing a noise in my 3.2l diesel that sounds allot like a cicada. I have checked all valve clearances and have adjusted to spec.

the motor has 250000km on it but the sound has been evident since i bought it with only 105 000km.

The timing chain tension seemed to look fine to me (which means nothing).

I am aware that these tensioners are prone to failure and I will be replacing.

But while I have the car in the shed, i was hoping some one may be able to assist me with the noise sounding like a cicade.

extra info - I have cleaned intake manifold and EGR parts giving me major power difference but noise remains.

all fan belts have been replaced but noise remains.

valve clearences are to spec.

timing chain has never been replaced and I have not checked the timing or am aware if I need to. (some may laugh at me for this, feel free)
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Reply By: Rangiephil - Thursday, Jul 07, 2016 at 14:03

Thursday, Jul 07, 2016 at 14:03
When a Landrover TD5 has a chirping sound the place to start looking is for an exhaust manifold leak. Look for soot on the head next to the manifold.
Regards Philip A
AnswerID: 602173

Reply By: MUZBRY- Life member(Vic) - Thursday, Jul 07, 2016 at 14:25

Thursday, Jul 07, 2016 at 14:25
Gday Stuart
I recon you might have a crack in some of the tin work on the engine . Possibly on the exhaust manifold or there abouts.
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AnswerID: 602174

Reply By: Member - Barnray (NSW) - Thursday, Jul 07, 2016 at 16:43

Thursday, Jul 07, 2016 at 16:43
Even tho you have replaced the belts give them a spray with wd40 While the engine is running to delete them completely
AnswerID: 602183

Follow Up By: noggins - Thursday, Jul 07, 2016 at 20:04

Thursday, Jul 07, 2016 at 20:04
Also if it comes in at around 1500Rpm check the EGR isn't chattering ( some were prone to do this )
Disconnect everything from it and try with it disconnected

FollowupID: 871789

Reply By: Member - nick b - Thursday, Jul 07, 2016 at 21:05

Thursday, Jul 07, 2016 at 21:05
Stuart : I hope Not but its most likely the timing chain :(

When you 1st start it in the morning its quite ,after a little time starts rattling ??

I did mine around the 150, 000 .....

Cheers Nick b

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AnswerID: 602191

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