4.0 Ohv louder at motor then exhaust?

[942wdSC]

Hi just wondering are the Ohv 4.0's normally motor loud trucks or does it sound like i have a leak i checked all the bolts they're tight and feel no exhaust coming out anywhere just wondering if i have an issue or they're loud motors?

 

[Ramcharger90]

Could be a cracked manifold. Or the timing is ready to blow apart

 

[4.0blue98]

You need to get a louder exhaust...

Mines always been a bit noisy. The 98+ versions like mine are known for it. I heard a few reasons from piston skirts to wristpins. Mine did it when I got it in 2003 and still does it with 182k. Never caused an issue.

 

[942wdSC]

I actually got new manifolds I pretty much threw a whole new top end on the truck and it doesn't sound different it's just loud

 

[Curious Hound]

Electric vehicles are generally much quieter all around.

 

[4.0blue98]

I like to pretend mine's a diesel. After a while the carbon knock will drown out the other noises.

 

[Snoranger]

If your fan clutch is bad, it can sound like a 747 taking off.

 

[Uncle Gump]

Sno makes a valid point... as usual.

What kind of noise are we talking about here... describe it please.

 

[adsm08]

Electric vehicles are generally much quieter all around.

They are. We had a particularly oblivious advisor at one place I worked, and I would make a game of seeing how close I could get to him in cars before he moved.

One day I got a hybrid into EV mode and got within an inch without him noticing. He jumped a foot when I hit the horn.

 

[Snoranger]

They are. We had a particularly oblivious advisor at one place I worked, and I would make a game of seeing how close I could get to him in cars before he moved.

One day I got a hybrid into EV mode and got within an inch without him noticing. He jumped a foot when I hit the horn.

We play that game with my supervisor, but it's a little different...
He's pretty much deaf when the batteries in his hearing aids die and we use an air horn on a dump truck. You can get within a foot of him with a tri-axle sometimes.

 

[942wdSC]

If your fan clutch is bad, it can sound like a 747 taking off.

I really don't know how to describe it it doesn't sound like a fan or anything abnormal it just sounds louder up at the motor compared to the exhaust

 

[4.0blue98]

The way to rule out the fan clutch would be to remove the serpentine belt and start it up briefly. If it's quiet then there's your problem.

 

[Dirtman]

Engines make noise.

 

[4.0blue98]

Some more than others.

 

[PetroleumJunkie412]

Get a better sound system. UNLEASH THE WATTS

My money is that you have a walker exhaust. They're eerily quiet.