help

twitch02x · Mar 11, 2015

Installed 6.0 manifolds and rudys up pipes this weekend and now I can hear the motor inside the cab. Sounds like there is a speaker under dash it is so clear, if I put in drive and give it gas while holding the brake it goes away. I tried loosening the down pipe and moving it around but it didn't help. Coming from trans tunnel area

Any ideas

SlowSmoke · Mar 11, 2015

twitch02x said:
Installed 6.0 manifolds and rudys up pipes this weekend and now I can hear the motor inside the cab. Sounds like there is a speaker under dash it is so clear, if I put in drive and give it gas while holding the brake it goes away. I tried loosening the down pipe and moving it around but it didn't help. Coming from trans tunnel area

Any ideas

Did you pull cab to do this?

SlowSmoke · Mar 11, 2015

It's the downpipe hitting the firewall, they get real close running 6.0 manifolds. What we do is loosen all cab bolts, lift up on the cab and roll the chassis forward as far as you can. There's about a half inch of play there and you can usually get enough by doing this. Easier said than done if you don't have a hoist though.

twitch02x · Mar 11, 2015

Didn't pull cab

forcefed6.4ford · Mar 11, 2015

Hammer fixed mine.

powerstroked08 · Mar 11, 2015

If I remember correctly there is a bolt that can hit the up pipe that will resonate the engine noise if it's hitting.

forcefed6.4ford · Mar 11, 2015

It's the support bolt for the fuel line on the back of the engine. I filed mine down.

SlowSmoke · Mar 11, 2015

forcefed6.4ford said:
It's the support bolt for the fuel line on the back of the engine. I filed mine down.

Where is there a support bolt for a fuel line on the back of a 6.4? Only thing I have ever seen rub is a downpipe or possibly a 6.0 manifold on the drivers side as that side is tight. Without a hoist it's obviously not as easy to repair. There is also a stud coming out of the firewall on the passenger side about half way up the up-pipe. That also gets real close with aftermarket piping.

powerstroked08 · Mar 11, 2015

SlowSmoke said:
Where is there a support bolt for a fuel line on the back of a 6.4? Only thing I have ever seen rub is a downpipe or possibly a 6.0 manifold on the drivers side as that side is tight. Without a hoist it's obviously not as easy to repair. There is also a stud coming out of the firewall on the passenger side about half way up the up-pipe. That also gets real close with aftermarket piping.

That's the one I'm taking about.