Cold Start Rattle
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
Likes: 2
From: Vancouver, BC
Cold Start Rattle
Hey everyone,
2017 2.7L. When I start the truck cold I have this very obvious rattle sound. Goes away when warms up. Anyone have an idea what this is?
https://youtu.be/KJS05k6zG_U
2017 2.7L. When I start the truck cold I have this very obvious rattle sound. Goes away when warms up. Anyone have an idea what this is?
https://youtu.be/KJS05k6zG_U
Lead Driver
Joined: Dec 2016
Posts: 5,650
Likes: 243
From: GA
Hey everyone,
2017 2.7L. When I start the truck cold I have this very obvious rattle sound. Goes away when warms up. Anyone have an idea what this is?
https://youtu.be/KJS05k6zG_U
2017 2.7L. When I start the truck cold I have this very obvious rattle sound. Goes away when warms up. Anyone have an idea what this is?
https://youtu.be/KJS05k6zG_U
Lead Driver
Joined: May 2015
Posts: 5,889
Likes: 360
From: Mts. S. of San Francisco
My 3.5 does not do it either, and being the 1st generation of the 3.5, I know I have the "long" timing chain which is theoretically a bit more prone to something like this.
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
Likes: 2
From: Vancouver, BC
Not all. Only some, but I don't know what the percentages are. I have 3 friends with the 2.7, and none of them have this issue.
My 3.5 does not do it either, and being the 1st generation of the 3.5, I know I have the "long" timing chain which is theoretically a bit more prone to something like this.
My 3.5 does not do it either, and being the 1st generation of the 3.5, I know I have the "long" timing chain which is theoretically a bit more prone to something like this.
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
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From: Vancouver, BC
everything at the dealer.
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2nd Gear
Joined: Nov 2021
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Hey - I just had this fixed. It - for me it was a Cam Phaser issue that there is a service bulletin for. I'd already had my truck in for other minor warranty issues when they called and said that they'd heard it, got the parts in and fixed it.....the cam phasers control the variable valve timing....
Last edited by RA121824-2; Nov 9, 2021 at 02:42 PM. Reason: needed to add something
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Moderator
Joined: May 2005
Posts: 8,236
Likes: 1,248
From: San Antonio, TX
The sound is bad. My son in law had the same sound at only 4,000 miles, it was the timing chain in his 2016 2.7. The dealer put bulk 5w20 in the on the first oil change and the problem started within a few hundred miles. He took it in and they replaced the timing chain, guides and cam phasers. It's been perfect for 80k miles now.
I amazes me how many oil change places and even Ford dealers still go with bulk 5w20 in the EcoBoosts.
I amazes me how many oil change places and even Ford dealers still go with bulk 5w20 in the EcoBoosts.
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
Likes: 2
From: Vancouver, BC
The sound is bad. My son in law had the same sound at only 4,000 miles, it was the timing chain in his 2016 2.7. The dealer put bulk 5w20 in the on the first oil change and the problem started within a few hundred miles. He took it in and they replaced the timing chain, guides and cam phasers. It's been perfect for 80k miles now.
I amazes me how many oil change places and even Ford dealers still go with bulk 5w20 in the EcoBoosts.
I amazes me how many oil change places and even Ford dealers still go with bulk 5w20 in the EcoBoosts.
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
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From: Vancouver, BC
so mine doesn’t rattle when I accelerate. I thought maybe it was loose exhaust but I don’t think so. It’s coming from where the wheel well is.
Moderator
Joined: May 2005
Posts: 8,236
Likes: 1,248
From: San Antonio, TX
Does it sound different when you open your hood? The wheel well is just the best sound pathway from the engine compartment when the hood is closed. It may be just the cam phasers with yours. If it doesn't make any sound when accelerating.
At first it almost sounded like some stole your catalytic converter off that side of the exhaust.
At first it almost sounded like some stole your catalytic converter off that side of the exhaust.
Thread Starter
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New User
Joined: Oct 2021
Posts: 19
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From: Vancouver, BC
Does it sound different when you open your hood? The wheel well is just the best sound pathway from the engine compartment when the hood is closed. It may be just the cam phasers with yours. If it doesn't make any sound when accelerating.
At first it almost sounded like some stole your catalytic converter off that side of the exhaust.
At first it almost sounded like some stole your catalytic converter off that side of the exhaust.
Moderator
Joined: May 2005
Posts: 8,236
Likes: 1,248
From: San Antonio, TX
Not necessarily, they would have full oil pressure going to them. But when the computer tell the phasers to move, they would give a quick rattle for 2 seconds or so. If it was the timing chains the noise would always be present. I asked about opening the hood because you are likely to hear the sound differently that way. Now you say you hear it at the wheel well, but once the hood is open you will likely hear it coming from the top of the engine.