ls2cruiser wrote:Your truck will start to run like crap. You would have to pull the intake off
I bought a small video camera and fed that down into the intake manifolds a few times, wiping the sludge and oil off it, to get a view before cleaning them. i couldn't get it all the way thru and didn't want to risk it staying down there. I did that and the mod and the catchcan at 100k, which i clean every fortnite and do my fuel adjustment (2T and chemtech) every full tank of fuel and any surging disappeared, the car behaves perfectly, the oil for a diesel is still clean on the dipstick after 10k and I never have to top up more than 500ml between services and i can get in it and drive it for 6500km like on on the last run to Port Douglas and back and the engine runs better than ever. ML 165k no complaints, i will dig out the camera and do a follow up to see how they are after the mod and can, i haven't done it again since that initial peep ...This morning i removed the intercooler ( I had never cleaned it ) to check it for oil/sludge and gave it a flush with petrol, first flush I closed both ends and gave it a good shake and set it aside for a short time to let it soak, a small amount of black gunk was washed out (I bought the car at 100k now it is 165k) same shake and soak again for 2nd and 3rd flush it was clean so i wiped it down shook the remaining fuel out, checked the cores, soft brushed a few insects off and let it dry out for a few hours. Checked inside the intercooler inlet and outlet pipes, there was a film of oil on the inside of the metal 90 degree bend where the metal gasket is, cleaned all that out, wiped the insides of the rubber pipes with a cloth and they were surprisingly clean, so it was worthwhile doing for just the peace of mind that all my intake is nice and clean and is not likely to get oiled up or dirty again probably for the rest of its life...(I guess the metal pipe condensed more mist/vapour than the rubber pipes).