Vauxhall Insignia A20DTH 2011 Diesel - Engine noise #
Posted by Tony Attwood on November 16, 2014, 4:26 am
Year of Manufacture *: 2011|
Engine Size and Code *: 2000 .. A20DTH
( Optional ) ECU Type: EDC17C59
( Optional ) Scanner Used: Vauxcom / KTS
( Optional) Fault Codes: None
Well actually this is not a ‘fixed and gone’ .. more of a heads-up but, if I can beg your indulgence Peter, I’ll update as required.
Above vehicle arrived Saturday morning suffering from irregular but frequent 'chunk - chunking' noises & the occasional squeak / squeal from the engine.
Driver reported the vehicle stuttered whilst being driven, when the noise was heard.
Along with this, live data showed an approx drop of 200 RPM & an engine load value rise consistent with the timing of the 'chunk - chunking'
First impressions/vibration was: the noise was originating from the turbo but the stethoscope & logic soon disproved this.
The turbo oil feed pipe was slackened & within half a turn of loosening, oil gushed from the union bolt, discounting oil pressure issues. ( OK, not scientific but enough of a first look to show oil pressure ok .. especially as the union is right in front of you. )
The Auxiliary belt was then removed to discount rotational component failure i.e. A/C compressor intermittent seizing .. .. No change in noise.
The vehicle drives very well, clutch felt excellent .. no judder, drag, roughness or anything that would suggest DMF .. Apart from the noise and faltering that was very consistent with DMF failure.
After consideration, it was decided to remove the cam carrier: Upon removing the carrier, it was apparent the the intake cam had both longitudinal & lateral movement in it, closer inspection revealed just two balls left in the bearing located at the timing gear end of the cam & no ball separator at all left around the bearing.
There is no trace of swarf, nor any sign of the missing balls around the cylinder head .. .. I find it hard to believe ATM that ALL traces of the missing bearing parts have disappeared into the sump without some residual evidence on the cylinder head top surface !!
I have received the go-ahead for sump removal & inspection / report so will update this thread.
This vehicle is a '61 plate, 2012 MY with 81500 miles on it.
Owner, who is a cab driver, only bought it six months ago with 64K recorded; he states he has had oil changed twice since purchase.