Wanted - Man with Andrew Lloyd Weber ear for Diesel Engines

EasyManHugo

Active Member
Joined
Jul 7, 2009
Messages
60
Location
Telford
Car
W210 E300 TD
w210 E300TD OM606 turbo engine

I've recently changed the glow plugs and injectors.....Now starts lovely. There is the usual diesel knock at tickover.
It ceases once the car is above idle.
However another knocking/pinking noise starts between 1000 and 1500 rpm.
Just the sweet sound of a merc 6 cyclinder diesel above 1500rpm.
Is this normal or a fault.

Many Thanks

EMH
 

Dieselman

Banned
Joined
Jul 13, 2003
Messages
34,206
Car
Peugeot 403 Convertible
Try disconnecting the EGR valve and also meter the MAF voltage.

It's probably the new injectors or the serpentine belt damper bushes rattling.
 
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EasyManHugo

Active Member
Joined
Jul 7, 2009
Messages
60
Location
Telford
Car
W210 E300 TD
Thanks Dieselman

Sounds like I'm already out of my depth

How do I disconnect the EGR valve.....and will this drive the ECU mental?

Also how do I test the MAF and what are considered normal readings.

Many Thanks
EMH
 

Dieselman

Banned
Joined
Jul 13, 2003
Messages
34,206
Car
Peugeot 403 Convertible
Disconnect the vacuum pipe that feeds the EGR valve. the ECU will engage limp home after about 5 minutes, but you will be able to test if the noise has subsided.

Meter the MAF at pin-5 WRT ground.
Expect ~2v at idle rising to ~4.8v at full revs and on boost.
 

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