any ecoboost yet?
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#9
Join Date: Feb 2005
Location: The Great State of Texas
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Just a friendly warning - The current 3.7 and 3.5 engines going into Mustangs and Edge's are experiencing cold start up knocking noises. My question to Phil (Ford Engineer)was ignored about these known problems that Ford has not addressed with these engines; therefore I'm questioning if the Ecoboost will suffer from these same problems. I'm not certain the knocking noises is piston slap or from the mechanical bucket lifter arrangement these engine have.
I would research these existing problems thoroughly before jumping on the EcoBoost bandwagon.
I would research these existing problems thoroughly before jumping on the EcoBoost bandwagon.
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Just a friendly warning - The current 3.7 and 3.5 engines going into Mustangs and Edge's are experiencing cold start up knocking noises. My question to Phil (Ford Engineer)was ignored about these known problems that Ford has not addressed with these engines; therefore I'm questioning if the Ecoboost will suffer from these same problems. I'm not certain the knocking noises is piston slap or from the mechanical bucket lifter arrangement these engine have.
I would research these existing problems thoroughly before jumping on the EcoBoost bandwagon.
I would research these existing problems thoroughly before jumping on the EcoBoost bandwagon.
3.5 cold start up knocking - Google Search
#11
Do you mean a knock, or tap? Is it the same RPM as the engine, or half speed?
You can see the way the direct action tappets are designed that they could (would) tap. The design simplifies the valve train, yet allows it to be incredibly responsive. The tappets are computer selected during production and my understanding is that they are not intended to be field adjustable.
Guess the camshaft could be pulled and different thickness tappets used, or a spacer ... but, my concern would be more if I had a super quiet engine that burned valves.
You can see the way the direct action tappets are designed that they could (would) tap. The design simplifies the valve train, yet allows it to be incredibly responsive. The tappets are computer selected during production and my understanding is that they are not intended to be field adjustable.
Guess the camshaft could be pulled and different thickness tappets used, or a spacer ... but, my concern would be more if I had a super quiet engine that burned valves.
#13
Join Date: Feb 2005
Location: The Great State of Texas
Posts: 6,233
Received 1,480 Likes
on
917 Posts
Do you mean a knock, or tap? Is it the same RPM as the engine, or half speed?
You can see the way the direct action tappets are designed that they could (would) tap. The design simplifies the valve train, yet allows it to be incredibly responsive. The tappets are computer selected during production and my understanding is that they are not intended to be field adjustable.
Guess the camshaft could be pulled and different thickness tappets used, or a spacer ... but, my concern would be more if I had a super quiet engine that burned valves.
You can see the way the direct action tappets are designed that they could (would) tap. The design simplifies the valve train, yet allows it to be incredibly responsive. The tappets are computer selected during production and my understanding is that they are not intended to be field adjustable.
Guess the camshaft could be pulled and different thickness tappets used, or a spacer ... but, my concern would be more if I had a super quiet engine that burned valves.
#14
I have owned a 2008 Taurus with 80K miles on it....never had one issue with that car 3.5L no ticking or knocking either.
I have a 2010 Taurus right now with the 3.5L 29K miles on it, and not an issue with that either. Car is running flawless
#15
I think this cold "knocking" you are referring to is fairly standard on direct injection engines. I owned a Mazda CX7 with the DI turbo engine and it would "knock" when it was cold outside.
If the temperature got below maybe 15-20F it would almost sound like a diesel on startup and before the engine warmed up. It was a fairly common issue that was talked about on forums.
Whether it is good or bad I don't know, I'm no engineer.
If the temperature got below maybe 15-20F it would almost sound like a diesel on startup and before the engine warmed up. It was a fairly common issue that was talked about on forums.
Whether it is good or bad I don't know, I'm no engineer.