Hi All,
I have a 2013 Stralis with 90,000kms Only and the piston liners are looking like this below.
What would cause this?
Electrolysis is a obvious one but i have never seen or heard of it happening so quick/badly.
Could a bad earth be part of the problem?
Could it have just been crap steel they used?
Cheers,
Nick
youtube.com/watch?v=5_7PtvziB-Q
youtube.com/watch?v=iZLc2BUttFI
Cavitation might explain it.Effectively tiny air pockets/bubbles forming in the coolant and then collapsing creating small shockwaves which smash the metal.Maybe the result of a loss of pressure in the system combined with a design which creates a lot of cylinder wall flex.
Rubbish coolant. Piston slap. Failed water pump. Air in system.
highwayandheavyparts.com/n-1106 … ained.html
vibrationacoustics.asmedigitalc … id=2275115
As noted in first article - bad cases can be in as little of 500 hours of operation.
Cavitation. Incorrect chemical composition of the coolant aggravates the issue. If the coolant in that engine had been OK then there wouldn’t be rust staining.
alsglobal.blog/en/cavitation-diesel-engines/
cat.com/en_US/by-industry/m … iners.html
■■■■■■■■■■■■■■■■■■■■■■■■■■■ … 00963A.pdf
Iveco will have their own specification for Cursor engines presumably.
If the vehicle is wired insulated return then you should also check for spurious voltages + o r- to the chassis from incorrectly wired or faulty equipment.
cav551:
If the coolant in that engine had been OK then there wouldn’t be rust staining.
Yeah if that liner has just come out and not been stood on a shelf for a couple of days then the coolant was buggered. I changed the thermostat on my MX5 which is at the bottom of the block and the whole unit comes as a complete housing, it uses OAT and despite being 10 years old there was no sign of any rust in the block when drained and the housing removed.
Wonder if a disgruntled driver put something other than coolant in the header tank.
Liners used to corrode like that back in the 60’s/70’s before folk started running their trucks with a 50% antifreeze mixture, never had any corrosion issues with them once that was sorted. I’m guessing that with the OP being in OZ they don’t use antifreeze there though?
Pete.
That looks like cavitation, far too much water in the coolant, maybe its had a leak and been topped up with water?
Scanias and Volvos used to suffer from liner cavitation back in the late 80s early 90s, was an additive Iirc and some trucks had new coolant filters each year which had some sort of additive built in.
maybe it was made with chinese metal? my brother works in an aircraft engine factory and he told me metal from china is a no no
Hi,
It had coolant in it when i purchased it but no idea if it did in the past so probably not.
But i’ve never seen liners get so bad let alone after 90,000kms even with no coolant.
Thanks for the replies.
bowers340:
Hi,
It had coolant in it when i purchased it but no idea if it did in the past so probably not.
But i’ve never seen liners get so bad let alone after 90,000kms even with no coolant.Thanks for the replies.
Cavitation can cause it along with poor coolant etc
