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Showing results for tags 'Valves'.
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SNPIEE posted a topic in 3.5LI have a 2010 Ford Edge SEL FWD 3.5L with about 80k miles on it. It has been increasingly developing a noise that took me a while to pinpoint as to where it was coming from. When in the car the noise sounded like a fan spinning up or a very rapid rattle/knock some where from under the center dash area. I did some digging and narrowed the noise down to the intake manifold area. This noise is not present at start up and idle hot or cold. It only starts when accelerating and most pronounced between 1500 and 2000 RPM. I can reproduce it easily and hold it when I accelerate to that range. When listening at the engine the noise sounds like valves tapping or backfire into intake manifold or something rattling in the intake. I was thinking that maybe the timing is off and I'm getting a backfire into the intake. What I tried so far: 1. Replaced spark plugs with new OEM plugs. No change. 2. Replaced spark plug coils with new (aftermarket). No change. 3. Replaced MAF sensor with new OEM. No change. 4. Sprayed (Drenched) almost everywhere with carb cleaner to try find a vacuum leak. The idea was if there is a leak the engine rpm would change slightly as it sucks in carb cleaner. Made no impact. 5. Removed upper intake manifold including throttle body, air box and MAF and tried running the engine. Engine wouldn't run until I hooked up electrical connector to the throttle body. The idea here was to see if the issue is mechanical (bad valves, etc). Other than trying to maintain smooth idle without throttle body and MAF, the engine seems to run fine. 6. Started putting the intake parts back one by one and seeing if I can reproduce the noise. With upper intake manifold installed, throttle body installed, vacuum tubes hooked up but MAF sensor not yet installed I couldn't reproduce the noise. When I installed the MAF sensor then I could reproduce the noise. Weird. I'm using a brand new MAF so why is it without the MAF it runs fine but with MAF it makes that noise?? 7. I'm lost.
macbwt posted a topic in 3.5LHere is the video of the exploratory viewing of the 2nd Generation 3.5 Duratec with 95K miles on the ODO. Had to break it down to change the plugs so thought might as well see what is inside. Let me know what you think. I found it to be interesting since I see no video's like this on youtube for the 3.5 duratec non ecoboost engine.
macbwt posted a topic in 3.5LI used my endoscopic camera to view the piston tops and intake valves of two 2011 Ford Edge limiteds with the 3.5 duratec. One is a grocery getter and the other is a work vehicle that drives primarily on the interstate. View the videos and see the difference.
Just wondering, I was watching Mac T's transmission flush video and thinking, "Where's his sexy foam blocks that Ford has placed on top of the valve covers and intake manifold?" Had the 2008 Edge even shipped with them? I recall reading more than a few threads ranging from valve noise to dying out and failing coil packs etc. Obviously this V6 engine has what may be classified as a noisy valve train. Ford felt it necessary to try and quiet things down, and shield the uninitiated from matters going on "down below" such as the VCT, aluminum valve covers, coil packs, etc. My question to others is this: I've thought about removing these insulating foam blocks from my 2013 to assist with heat dissipation from the top end and open up the air space in the engine compartment. In turn possibly, spare the coil packs from excess heat. In the colder winter months, put the foam blocks back in to help the motor heat up quicker and also protect the aluminum and other top end components like the fuel rail, coils etc from brine spray and moisture. I think who really cares if the noise of the valves are heard a little more? Just my thoughts. Any others out there like me?