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Injector + Cylinder question / opinion please
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Renton
 


Member Since: 13 Jan 2009
Location: Somewhere in the middle
Posts: 1718

2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
Injector + Cylinder question / opinion please

On my engine problems I just received word from the stealer.
One injector is dirty and needs replacement. They also advise to change all injectors because of the engine mileage. The car has run 96K miles.
Does it makes sense to change all injectors?

They also measured the compression in the cylinder. Normally its around 15/16Bar for new engines with a 10% allowance. The cylinder with the faulty injector has 13Bar pressure. They have an endoscope but its 9mm whilst the injector hole is 6mm, so they can't look inside the cylinder without taking the engine apart.
They think it shouldn't be a problem for the engine if one cylinders runs on 13bar.
Any other thoughts? CLUB ILLEGAL CAR WASHERS  
Post #5766838th Jan 2010 12:21 pm
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chrisbowler
 


Member Since: 30 Jan 2009
Location: UK WALES
Posts: 176

2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

I work as an Independant LR repairer and as per the Land Rover Service shchedule, I do not recall seeing a mileage based requirement to change, service or test injectors on TDV6 OR 4.4v8 ENGINES. I am however quietly confident that these injectors are VERY expensive so will make someone a nice profit if all need changing.

Regards Chris Bowler Chris Bowler
D3 2005 EXPEDITION
D2 Challenge Vehicle
300 TDi Spare car
107" TD5 Comp Safari Motor  
Post #5770288th Jan 2010 6:48 pm
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10forcash
 


Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534

United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt SilverDiscovery 3

The ECM system in conjunction with a spill test is sophisticated enough to provide good dynamic data on injector performance to isolate a defective injector, i'd personally change the one outside of compression range as this generally indicates cylinder' wash' from a failing injector, potentially the next stage is that the injector turns into a plasma cutter on the crown of the piston...  
Post #5770358th Jan 2010 6:54 pm
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Renton
 


Member Since: 13 Jan 2009
Location: Somewhere in the middle
Posts: 1718

2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks Chris and TFC.
You confirmed my thoughts. Before I change anything I have all injectors ultrasonis cleaned and then tested.
Costs about 35 each. A new injector is about 190. CLUB ILLEGAL CAR WASHERS  
Post #5770768th Jan 2010 7:56 pm
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