Cam Phaser Bolt Issue
Thread Starter
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Tuned
Joined: Aug 2017
Posts: 403
Likes: 72
Cam Phaser Bolt Issue
Hi all,
I have a 2005 5.4 3V engine, I have refreshed with new cam phasers(OEM Ford) and have had the passenger side phaser bolt back out on me. I have built hundreds of engines, from Ford to chevy to Honda high performance applications. I torqued the bolts to the suggested torque specs of 30 foot pounds, and the 90 drgree TTY. Has anyone experienced this? Should I use thread lock? any help would be great. I actually really like this stupid motor, it just pulls whatever I throw at it with ease, until now.
Thanks!
I have a 2005 5.4 3V engine, I have refreshed with new cam phasers(OEM Ford) and have had the passenger side phaser bolt back out on me. I have built hundreds of engines, from Ford to chevy to Honda high performance applications. I torqued the bolts to the suggested torque specs of 30 foot pounds, and the 90 drgree TTY. Has anyone experienced this? Should I use thread lock? any help would be great. I actually really like this stupid motor, it just pulls whatever I throw at it with ease, until now.
Thanks!
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
Likes: 193
Was that a new bolt . Are both sides backing out . This is highly unusual. No thread lock is used. Any chance you got used or counterfeit bolts . People try to sell used bolts .
How much do you trust that torque wrench . I forgot that torque spec off hand .
If its one side I would suspect you have bad threads on cam .
Test your torque wrench . You can test it with a luggage scale . Are you sure the pins engaged the cam off phasor to cam . I know that has happened to some guys , did you use the toothed holding tool on phasor or did you use vise grips . I don't like the vice grip method . I have had touble with click torque wrenches , now i use a dial type or electronic adapter . Are your pin holes wallered out on cam .
How much do you trust that torque wrench . I forgot that torque spec off hand .
If its one side I would suspect you have bad threads on cam .
Test your torque wrench . You can test it with a luggage scale . Are you sure the pins engaged the cam off phasor to cam . I know that has happened to some guys , did you use the toothed holding tool on phasor or did you use vise grips . I don't like the vice grip method . I have had touble with click torque wrenches , now i use a dial type or electronic adapter . Are your pin holes wallered out on cam .
Thread Starter
|
Tuned
Joined: Aug 2017
Posts: 403
Likes: 72
Was that a new bolt. Yes, OEM phasers and bolts Are both sides backing out. Passenger side only so far This is highly unusual. No thread lock is used. Any chance you got used or counterfeit bolts . very possible People try to sell used bolts .
How much do you trust that torque wrench . very much, as it's used to build precision engines regularly I forgot that torque spec off hand .
If its one side I would suspect you have bad threads on cam .
Test your torque wrench . You can test it with a luggage scale . Are you sure the pins engaged the cam off phasor to cam . Yes, I'd be surprised if they weren't as the cam phaser would be out of alignment with the chain I know that has happened to some guys , did you use the toothed holding tool on phasor or did you use vise grips . holding tool I don't like the vice grip method . I have had touble with click torque wrenches , now i use a dial type or electronic adapter . Are your pin holes wallered out on cam .
How much do you trust that torque wrench . very much, as it's used to build precision engines regularly I forgot that torque spec off hand .
If its one side I would suspect you have bad threads on cam .
Test your torque wrench . You can test it with a luggage scale . Are you sure the pins engaged the cam off phasor to cam . Yes, I'd be surprised if they weren't as the cam phaser would be out of alignment with the chain I know that has happened to some guys , did you use the toothed holding tool on phasor or did you use vise grips . holding tool I don't like the vice grip method . I have had touble with click torque wrenches , now i use a dial type or electronic adapter . Are your pin holes wallered out on cam .
The end of the cam looks fine, and didn't feel unusual that the bolt wasn't tightening. Just not sure why it happened. at this point I feel like cramming a glob of red threadlock in it...
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