Cracked manifold?

I have the dreading ticking sound coming from my passenger side of the engine bay on my 2005 tundra. The symptoms seem to be consistent with those of the cracked manifold, except everywhere I read says that the ticking goes away once the engine warms up however mine does not. It consistently ticks from the passenger side anytime I apply gas, any speed or temperature. It is not audible from inside the cab but with the windows down or from the outside it is pretty loud. Does anybody know if it could be something different from manifold?

 

What could it be? Could be valve train noise, or any rotating assembly piece that is making contact with another object during revolution. What is it most likely? The exhaust manifold. How to diagnose? Automotive stethoscope.

 

Sounds like you may have a cracked manifold. I’ve learned to live with mine but it goes away when the engine’s warm. I wouldn’t worry myself unless it gets louder and you think you might not pass inspection. If it were big enough it could throw off the air/fuel mixture. I can’t say from experience how large a crack it would have to be for that to occur.

 

Maybe this video will help.

https://youtu.be/lGB21ctR-L4?si=YeMUJe3YfB83ZmLP

 

I have it, more on driver's side than passenger. Increases with speed. Heat doesn't seem to have any effect on it. I have 75,000 miles. I highly doubt it's manifolds, but injectors make quite a bit more sense. I haven't tried to unplug power to any though, to see if it changes. Mostly because IDGAF. It's a tick. Vehicles have ticks, it happens. As long as your steering shaft seal is OK, you shouldn't hear it in the cab.

 

Same exact thing with me. I’ll have to check the injectors, I can’t stand out of place noises on my truck. Thanks for the info

 

I had someone, long ago, tell me it's just the injectors making noise. It sounds like a sewing machine to me. I always find it funny, because Toyota used to make (and maybe still does) sewing machines. Initially I thought it was valvetrain chatter.

 

Another thing about the noise, it only makes the ticking when I am in drive or reverse, when I am driving and put it into neutral and rev it, there is no ticking. It sounds exactly like the exhaust leaks I’ve heard others have otherwise though.

 

Have you ever had anyone stand outside the truck when you're reversing to say if it's outside, and maybe under the truck?

Specifically for them to look for: Does the ticking match a specific point when the driveshaft is spinning?

If no friends available, have you tried setting a phone under to record while in reverse and see when the noise is loudest during your path?

 

Check the rear spark plugs as well. Some 2UZ's have been known to have the rear most plug work its way loose during heat cycling and you can get blow by. It can also cause misfiring as the coil pack will get cooked.