96 Cougar 4.6L engine noise

Reply

  #1  
Old 08-10-04, 01:29 PM
aja8888's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Texas
Posts: 69
Unhappy 96 Cougar 4.6L engine noise

Folks, I have a problem!

Wife's 96 4.6 stock Cat (68K) started making a rattling/ squealing noise from the front of the engine. I have never heard this kind of noise in my lenghty career with cars (1949 Chev on up!). At first, I thought one of the pulley bearings was going out. I drove it a while longer and the noise went strictly to a loud rattle of sorts. I removed the serpintine belt and checked all the pullys for bad bearings. They all felt and turned good. I started the car with the belt off and the noise continues. It actually sounds like a marble is rattling around under the timing chain cover or the valve covers.

Any ideas? It looks like (in my service manual) the only things that can get loose under a cover are the timing belt tensioner and spring and possibly a camshaft mounting bolt or a lifter. The engines runs smooth so a cylinder is not out due to a sunk lifter or rocker arm.

Thanks in advance for the replies!

Tony
 
Sponsored Links
  #2  
Old 08-10-04, 04:18 PM
Member
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
Take a peek under the timing belt cover from your description that's where I would look.Do you have good oil pressure?
 
  #3  
Old 08-10-04, 04:59 PM
aja8888's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Texas
Posts: 69
Thumbs up Will do!

Davo: The oil pressure is where it normally is as I watched the gauge intently driving it home. I suspect that a chain tensioner busted, but I am not positive. I plan to pull the front cover off Saturday when I have several hours. I need a wheel puller for the harmonic balancer and the PS Pump pulley to get the bolts out. It is a SOHC engine so the cover is fairly encompassing on these 4.6 liter engines.

Tony
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes