FreeFall_801 wrote:I have some sneaky info for you all. This is what the service advisors have been given. My understanding and that of the adviser where the info came from is that it started as a service campaign but has now been changed to a recall. Which would tie in with CD saying that they are going to contact their owners database.
"Description of Problem and Prevention
MMC has advised that Triton and Challenger equipped with 4D56 High-Power engines may
exhibit a symptom of overheat caused by the loss of coolant.
As preventive action, the following corrective measures are implemented.
Replacing the radiator cap with a high-valve-opening-pressure type (raising the boiling point)
Replacing the coolant (To increase concentration from 30% to concentration 50%)
Reprogram of ECU (for early detection of coolant loss to prevent damage to the engine.)
Cause
Engine overheat may occur due to excessive loss of coolant that may be caused by repetitive
coolant evaporation.
Localised coolant evaporation could also occur after high load driving such as towing heavy
cargo.
Also, if the sealing condition is not adequate at the upper surface of cylinder block (due to the
surface roughness) engine coolant blow-by may occur promoting overheat.
Production Fix
Radiator cap valve opening pressure changed from 109kPa to 127kPa effective 21/02/2014
Coolant concentration changed from 30% to 50% effective 22/11/2013
ECU program changed to add coolant loss detection function (CEL*-on and engine output
restriction in case of detecting coolant loss) effective 09/09/2013
CEL*=“Check Engine Lamp”
Improved smoothness of upper surface of cylinder block for engines built on and after
18/03/2014 (engine number 4D56 UCFA9504 onwards)"
That's a very interesting checklist
Seems that they have been active on the production side of things for a while, again backed up by the poster a few above with a 2015 model already fitted with the higher capacity cap
Like how we are nearly 18 months into better block smoothness for example