The blow by hose on my OM602(NA) was cracked and allowed sludge to accumulate in the intake and the intake ports, all over the intake valves too. Is there any safe way to clean both the manifold and those ports? I had the intake off to ream the glow plug holes, service the injectors (being rebuilt by greazzer), and check the plastic fuel hard lines (thankfully no cracks or chaffing) and just noticed how nasty it was.

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.