RIPPERTON wrote:A friend has a 2017 Land Rover Discovery SD4 2.0l diesel twin turbo with only 70000km on it and the engine has a lot of blowby.
He takes it to the dealer and they say it has low compression in one cyl and quote $54k to install a replacement engine.
I said I would try my Nulon engine wash to try to save the engine.
I drain the oil which looks like it is more than 10000km old, soot black. I do my usual compressed air purge into the oil filter outlet.
I put 6l of Magnatech in with half a can of Nulon and drive 50km.
Drain the oil again, it comes out pitch black. Compressed air purge and new oil.
Didnt have oil filters so I washed it out in unleaded fuel. I ordered 20l of oil 3 filters and 3 cans of Nulon
Another 6l of Magnatech and 3/4 can of Nulon and after a drive the oil is starting to stay clean.
After work I get in this and just drive it around for an hour, cleaning the inside of the engine.
I pull the injectors and find a lot of carbon buildup on the tips. The base washers look ok , they arnt leaking compression into
the cam case (blowby)
The standard washers look skimpy so I cnc new ones with smaller ID and larger OD, same thickness. These have more bulk to them and are a lot tougher.
They will be installed with Locktite sealer.
I also sprayed a full can of Nulon top end cleaner down the injector holes basically filling the cylinders and cleaning the compression rings from the top.
The 4th pic shows the air gun with hose used to purge the old oil. It is held onto the hole in the center of the oil filter housing.
dumper wrote: so it’s not how you change the oil it’s when you do it that makes the difference
metalworker0 wrote:i wanted him to, take spark plugs out put all the pistons at same height down the bore ..and pour cellulose thinners down them and leave it overnight ..then put some oil down the bore to take away the dryness, then do an oil change. he would not go with the idea ..but I'm sure it would have worked somewhat.
all the best.mark
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