I'm STUMPED on this one???? Any ideas???

[2000StreetRod]

exhaust leak?

It almost sounds like an exhaust leak to me but they are usually worse when cold than warm. You might try getting a 3 foot section of hose and put one end at your ear and the other at various exhaust places to listen for a leak. Using the hose also might help you locate the source of the noise if its not an exhaust leak.

 

[FireZingr]

Yeah at times I am thinking exhaust leak but would an exhaust leak cause it to misfire and miss when idling. Once driving it seems normal like it is not missing at all.

 

[FireZingr]

Plus according to my on board computer my gas mileage was went from and average of 13.8 MPG down to 10.2 MPG

 

[FireZingr]

Shadetree mechanic down the street said sounds like I have a bent/broken rocker arm

 

[Eagleisx]

Or Bent or Broken Pushrod!!

 

[FireZingr]

Nope....... Broken timing chain guides

 

[DonDDR]

Whats up with the timing chain guides? My 4.0 makes a tick like a failed lifter.

 

[bluestream1]

Nope....... Broken timing chain guides

Seem to be hearing that a lot these days...

How many miles does it have?

 

[DonDDR]

What is the low down with the guides and why does it sound exactly like a lifter?