Quote:
Originally Posted by sixto
Slow cranking might just be the battery fading. If the starter turns the engine, I’d check for glow and fuel. Loosen each injector line at the injector then crank. Does fuel leak from each fitting?
606s aren’t known for timing chain issues but cam and IP timing would be on my list to check. Does the 606 turbo IP have an RIV port?
For the heck of it I’d pull the valve cover to make sure the cams are intact and the lifters move as they should while turning the crank.
Sixto
98 E320s sedan and wagon
02 C320 wagon
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He had a brand new battery in it and replaced the starter IIRC and it was still a slow crank. Might be worth checking to make sure there isn’t an electrical issue on either end.
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Only diesels in this driveway. 
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k
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