SPONSORED LINKS

Loud hooting, screaming noise all the time, idle or fast

Tiny
KAYMACKSIMMONS
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
This noise is all the time loud and has a wierd smell
Monday, March 30th, 2015 AT 7:43 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Check the accessory belt under the hood. It sounds loose. Chances are the tensioner is bad.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, March 30th, 2015 AT 9:03 AM
Tiny
KAYMACKSIMMONS
  • MEMBER
  • 2 POSTS
Changed belt that made no difference. Sounds like it is coming from the back of the engine. I was told by a diesel mechanic that it was the hooter valve. What is that?
Was this
answer
helpful?
Yes
No
Monday, March 30th, 2015 AT 9:47 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
I hate to say it, but yes, it is an actual part. It is the crankcase vent valve. See the pic attached.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Monday, March 30th, 2015 AT 7:36 PM

Please login or register to post a reply.

Related Ignition Timing Content

VIEW MORE

Sponsored links