ninjatalon

iTrader: (1)

Well,one thing for sure is that intake valves aren't cleaned by fuel additives. The pcv and egr system might be biggest reasons why the valves get dirty. I'm suspecting that cam timing has its part also

peeblesm

I wouldn't worry about it. Just enjoy the truck and drive the hell out of it tell it breaks Use it as a truck is intended for, If something goes while still under warranty just take it in to get fixed. When the warranty runs out, we are all pretty much screwed with the cost of replacing something in our trucks(just hope its not the turbo's or the tranny). The more someone worries about situations, the more prone a problem will occur IMO. Nothing personal, just my opinion.

Joewee3.5

Oh I'm not worried. I'll sell mine before warranty is up. I was just curious what everyones thoughts were. I've read that high heat will remedy the build up so I floor it regularly haha. Also, I was just pointing out that the torture test engines valves didn't have heavy deposits.

Vwluca

I wouldn't worry about it. I know that it has nothing to do here but I'm also a BIG fan of VW's (21 years) and my other car is a 2006 TDI which is also a direct injection. When I bought it some would say that the cams were weak and also that because of direct injection carbon buildup would also happen and turbo (vnt actuators) wouldn't function anymore. I was freaking out and the car was new. Then someone said ''drive more and worry less''. And this is what I did. Make sure that maintenance is done religiously and once in a while drive it like you stole it. Now 273,000km and like new and none of the above mentionned problems.

So ......... I will do the same with my new EB that I LOVE !!

good luck to all

Luc
Montreal, Canada

amascio

Seems like I read somewhere that Ford has a heated PCV system - in other words there is a heating coil that turns the blow by gasses (which could stick to the intake valve because they are mixed with moisture coming out of the engine oil) into a dry smoke (or vapor perhaps) which doesn't clog the valves because it has already been burned up by the PCV.The vapor is just sucked into the combustion chamber and doesn't cling to the intake valve.

I'll see if I can find that info again and post a link here....

amascio

Well, I was wrong about the heated PCV valve - the Taurus Ecoboost has it.

I looked here:http://www.fordparts.com/ at the PCV for my FX4 and the illustration appears to be a non heated valve.

Pretty neat web site; just join for free, punch in your vehicle VIN a check out parts and prices. Lots of exploded parts diagrams, which is totally cool. It's an official Ford site too!

OK the search goes on.....

Georgiaboy5.0L

This is an older post......but does anyone have anything new to add to this topic......thanks guys

acdii

Well 2 things that can cause the deposits, the first is the crankcase blowby(PCV) that can accumulate on the valves, and the second is oil drawn past the valve stem seals by the vacuum of the engine. You would think Diesels would have this problem since they are DI, but they are also turbo charged, so the extra pressure of the turbo helps keep the oil from sticking to the valves, and most likely the same will hold true with the TTDI EB.

When you think about it there are only 3 things different between the TTDI and a Diesel, the fuel, the ignition, and the compression. Other than that they are pretty much identical in how they operate. Replace the spark plug with a glow plug, increase compression and you have a diesel engine. I think diesels run higher boost though.


I havent looked at other DI engines, but are all of them FA? I'm curious myself how Ford found a way to alleviate the issue with deposits.

offroadeco

GM has n/a DI engines in a few cars and are testing more of them includeing a TTdi v6. The Hi feature v6 in some of the cadi's and the ss fwd cars are DI.

rancherlee

If you don't have oil usage issues then Carbon shouldn't be a problem on a DI engine. Yes Gas cleans the valve, Ethanol even more so, but oil past the valve seals is the main culprit. I'd only worry about carbon on the intake valves IF your burning more than a quart between oil changes OR there is a puff of blue smoke every time you start it though with a turbo charged engine that could also mean a leaky turbo seal.