New Ford Expedition with V6

Turtle n Peeps wrote:

brulaz wrote:

Turtle n Peeps wrote:

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I would think they would lean from the 6.5 timing chain issues not to run a HPFP with a chain. My chain was junk at 130K and my HD chain was only about a foot long. Nothing like the mile long chain like they run on these EB's. No wonder they are having stretch problems. :S And guess what drives the new Ecodiesel pump? :E
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Suspect it's pretty hard to get away from chains in any V engine these days. IIRC even the new Cummmins 5L V8 diesel has four, and the two cam chains are quite long.

But even poorly engineered short chain systems in an I4 diesel can be a problem, as I found out with my 2005 Passat TDI. There the chain guides of the oil pump chain would wear down making for lots of chain slop and eventual failure. VW fixed it by providing a drop in geared replacement.

I don't know, what's wrong with a push rod engine? Easy to go with a gear to gear. Why do we have to go with OHC and mile long streeeeeeeecheeee chains? V8 push rods engines still dominate in racing and towing alike.

I just don't like chains. Too many problems in my life with them. My new engine is a push rod belt drive cam. I hope I won't regret that either. :E

Understood. And agree.

But all engines, even the newer push rod engines, while less chains/belts, are getting pretty complicated: there's the cylinder de-activation in the GM's Ecotec3 line using oil pressure, CVVT, and it seems that all new engines are direct injection now-a-days with the issues that could arise there.

Just not sure that GM's 5.3L or 6.2L Ecotec3 with all these new features, will be any more or less reliable in the long run than Ford's 3.5L Ecoboost with its turbo, intercooler and chains.

Only time will tell, I guess.