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3.5 Ecoboost issues solved for 2018? #5291866 12/11/19 08:30 PM
Joined: Dec 2017
Posts: 3,206
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JLTD Offline OP
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Joined: Dec 2017
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Hey folks - looking for some thoughts on a 2018 Ford 3.5 EB, considering one as a replacement for Ms JLTD's 2008 Jeep.

From my reading online, I believe that they've ironed out all the issues and the engine is good to go.
(except perhaps for the water pump inside the block?)

Would appreciate any comments or knowledge.



"Let’s not pretend like 0w20 is anything but a CAFE required crutch to eek another 1/2MPG" - BLND1

Hers: 2018 Ford Flex AWD EB, 35k, dealer fill

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291901 12/11/19 09:08 PM
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Driz Offline
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Scotty Kilmer had a great segment on that water pump🤦🏻‍♂️ $1500 to change a water pump sure would bring tears to my eyes and that’s only if you catch it before the water trashes the block. If that went away I’d call it fixed otherwise it’s just a disaster delayed...... just my 2 cents worth. My buddy has one though and loves the thing

Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291918 12/11/19 09:25 PM
Joined: Dec 2013
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clinebarger Offline
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Other than Water Pumps & Timing Chains.....The FWD 3.5L EB is a good engine!

DI puts soot in the oil, The oil in a boosted engine is already stressed.....This leads to accelerated timing chain wear! High quality synthetic oil at 5,000 mile intervals will help a lot.

Cracked spark plugs are more common in the F150 version....But I've seen it in the FWD versions as well. It's comical that the old Autolite sourced plugs never had a cracking issue....But the NGK sourced plugs do.

These engines HAVE a external weep path for the water pump....Don't ignore coolant drips OR coolant smells. Water pump labor on a '18 Explorer calls for 12.4 Hours so it's not cheap!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291924 12/11/19 09:29 PM
Joined: Dec 2017
Posts: 3,206
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JLTD Offline OP
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Joined: Dec 2017
Posts: 3,206
Thanks guys...should have mentioned this is an AWD Flex.


"Let’s not pretend like 0w20 is anything but a CAFE required crutch to eek another 1/2MPG" - BLND1

Hers: 2018 Ford Flex AWD EB, 35k, dealer fill

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291926 12/11/19 09:31 PM
Joined: Aug 2013
Posts: 677
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tcp71 Offline
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Posts: 677
The pump isn’t inside on the f150s, only on the transverse mounted engines.

Keep up the oil changes and the engine is fine.

FYI

400k mile 3.5 eco

Last edited by tcp71; 12/11/19 09:38 PM.

2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: NAPA 5w30 syn. (varies)
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291936 12/11/19 09:50 PM
Joined: Feb 2011
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fsdork Offline
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Joined: Feb 2011
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I just watched a video about the F-150 version of the 3.5 Ecoboost this morning. The presenter mentioned that in the 2018+ F-150s, there was a revision to the timing chain components so that a second tensioner was added to remove slack from the chain more equally. I'm not sure if that translates to the engine in the Flex, but that seems like a significant upgrade to me.

https://www.youtube.com/watch?v=NOBsDgdUEyM


2003 Ford Explorer Limited 4.6L 4x4 - 219K km
2008 Ford CVPI 4.6L - 133K km
2011 Ford F-150 Lariat S/C 6.2L 4x4 - 90K km
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291943 12/11/19 09:57 PM
Joined: Aug 2004
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double vanos Offline
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I’ve got an ‘18 3.5 EB in my F150 and so far it’s great! I’ve only got 8k miles on it but so far so good. Of course mine is in a truck but the engine is pretty much the same excepting the water pump location. You’ll love the power.


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291956 12/11/19 10:17 PM
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double vanos Offline
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The engine in that video is a gen 1. The gen 2 has two separate chains, one for each bank. The mechanic in the video is right; regular 5k oil changes with a good filter is one of the most important things you can do for longevity. That plus drive them. If you try to hyper mile an Ecoboost engine it won’t like it. Drive it like a performance truck - Ecoboost motors thrive when being worked.


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5291963 12/11/19 10:31 PM
Joined: Oct 2014
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Impatient Offline
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Joined: Oct 2014
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Somewhere around there (2017-2018?), Ford went to a hybrid DI / PI design, and (as mentioned above) replaced one super-long timing chain with 2 shorter ones. These were important improvements. I assume the PI will mitigate the intake valve carbon buildup issue. I don’t know if fuel dilution is mitigated. I’m still looking to see if there have been any changes to the ignition coils, or whether that has even been an issue for awhile.

Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5292057 12/12/19 04:19 AM
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tcp71 Offline
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The second generation eco showed up in the f150 for 2017. Dual timing chains and both types of fuel injection started with gen 2 along with a 10hp and 50lb/ft increase in torque. That said, I don’t think the flex ever got the gen 2 version


2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: NAPA 5w30 syn. (varies)
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5292304 12/12/19 10:41 AM
Joined: Sep 2011
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itguy08 Offline
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133k on an EB in a 2010 SHO. In 2 weeks it will be 10 years old.

Oil changed by the book at around 7.5k. Most of its life at the dealer. Only since 70k or so did I do them at home with synthetic. Still the original water pump and chains. They (the chains) will rattle occasionally on a cold start if it sits a long time (days or more).

According to some it would be sooted up, have coolant in the oil, and be dead by now. It still runs like a top.

I'd not hesitate to buy another SHO, Flex, or Explorer with this engine. It's been rock solid for me outside of a knock sensor under warranty. One of the most reliable vehicles I've owned.

Last edited by itguy08; 12/12/19 10:41 AM.
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5292394 12/12/19 12:07 PM
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BeerCan Offline
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Like itguy08 I have a gen 1. It has ~115,000. No noise, dependable truck. I do about 10k oil changes. Done a uoa every time. It was worked real hard up until about 80k now it's just a grocery getter.


2020 Porsche Cayenne
2017 Ford F250 6.7 PS
2016 Ford F150 3.5 EB
2016 Porsche 981 GTS
2015 Ford Mustang 2.3 EB
My car list is getting long smile
1994 Porsche 968 Coupe
1987 Porsche 944 Turbo
Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5292482 12/12/19 01:29 PM
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cptbarkey Offline
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Probably a great engine to own when its under warranty. Good luck on labor costs outside of warranty.

Re: 3.5 Ecoboost issues solved for 2018? [Re: JLTD] #5292503 12/12/19 01:44 PM
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dareo Offline
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Well now that the 5.0 has the plasma cylinder liners in 2018, the 3.5 EB would be my F150 engine of choice. What i really want is F150 with the GM 6.2 V8 but that would be too awesome and therefore not permitted.


2018 Regal TourX, 2016 Golf Wagon 5MT, 2016 GMC 1500 SLT 6.2
Re: 3.5 Ecoboost issues solved for 2018? [Re: dareo] #5292603 12/12/19 03:43 PM
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tcp71 Offline
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How about Ford’s new pushrod 7.3 gasser in that F150...won’t happen, but it would be fun.

Originally Posted by dareo
Well now that the 5.0 has the plasma cylinder liners in 2018, the 3.5 EB would be my F150 engine of choice. What i really want is F150 with the GM 6.2 V8 but that would be too awesome and therefore not permitted.


2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: NAPA 5w30 syn. (varies)
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