Thread: TD5 Clatter at low revs

Check the crankshaft pulley for broken webs on the bolt-on section. If it breaks off completely then it will damage surrounding parts such as the radiator. If broken then better to remove it than leave it attached while another is sourced.

Originally Posted by Discosux

Hi guys, just wondering what causes the clatter?

It's intermittent and usually solved by giving the throttle a little blip - but comes back after a bit.
I've noticed the MAF reads 55 ish when she's quiet but gets up to around 60 when it's clattery. (idle)

TPS reads the same for both.

Cheers

Is it a true clatter or a loud tick tick tick and then it goes for a while before ?

Originally Posted by onebob

Is it a true clatter or a loud tick tick tick and then it goes for a while before ?

I'd call it a clatter, It's not like a lifter tick or bearing. But the clatter does go away with a light throttle blip and will return after a min or so if left ideling.

The airflow @ idle reading does change after the blip. 60 = clatter, less than say 55 = a civilised noise level. (grams / stroke? on nanocom)
A blip usually totally eliminates the clatter. <- this is a constant. Airflow is always higher with the clatter.

The clatter continues until a bit higher in the rev range, once up to speed it's gone.

TPS voltage readings are the same for for clatter and quiet running. Idle speed is the same.

To me it's a fuelling issue or some such thing, not mechanical. IMO - But I'm a diesel beginner. Injectors?

I'm running a mildish tune, It did it before the tune as well on a totally different ecu
I'm running 10w 50 engine oil as a test - no change. Oil pressure is through the roof. I'll be going back to 5w30 / 40. The engine seems healthy and strong 270k on the clock

Mafless EU2 tune, EGR deleted, manual, snorkle, straight through exhaust.
K&N or standard filter made no diff.

Injectors aren't leaking, Absolute minimum blowby - I don't think she's even run in yet.
I haven't checked anything in the valve train, next weeks job

Was it making the clatter before the EGR was deleted? Mine clattered a little on or just above idle with EGR disabled.

Originally Posted by Graeme

Was it making the clatter before the EGR was deleted? Mine clattered a little on or just above idle with EGR disabled.

I honestly can't remember. The EGR was in the bin literally 20 mins after I bought the d2

Is it just diesel rattle that you're hearing?

I simply unplugged the EGR solenoid electrical connector on my '99 and also the ILT solenoid connector on my '03.

Originally Posted by Graeme

Is it just diesel rattle that you're hearing?

I simply unplugged the EGR solenoid electrical connector on my '99 and also the ILT solenoid connector on my '03.

I don't think so, re; the rattle. I'll take a vid / audio and post it here tomorrow.
What's an ILT solenoid? not sure my '99 has that.

I threw the solenoid in the bin, dummy plugged the vac line, removed all the remaining EGR guff.

Cheers mate

Not that it really matters, but the nanocom incorrectly reports the airflow on at least one of the info screens.

All airflow readings on a nanocom for a TD5 are in kg/hr not grams/second.

Cheers
James