[s-cars] Knocking developed while on highway

[ELLIEOLSEN at aol.com]

Sounds like what happened to my car...violent shaking....and then 
 
S
 
 
In a message dated 5/7/2008 9:12:40 A.M. Central Daylight Time,  
trgreen at comcast.net writes:

Wow,  real answer is I don't know, so you can ignore the rest if you   
like.

I guess a quick engine burp could rotate the engine on bad  motor mounts
enough to tear the intake hose.  Otherwise, I would think  you would  
have had
other indications if the hose was torn for a  while, i.e., MIL or miss/ 
jerk on
acceleration.  But what could  cause such movement to tear the hose?    
Look
under the upper  timing belt cover to check for any visual damage.    
If  you
see anything suspect, I wouldn't turn the engine over any more  until  
you can
confirm it's ok, and valve sprockets and  crank/flywheel marks align  
at TDC.

I read that you have the  knocking noise at idle and hear it just  
looking under
the  hood?  Check the hydraulic fluid level, since the pumps are known   
to be
noisy (knocking sound) especially when low on fluid.  It, or  another  
accessory
could be failing (alternator, A/C compressor,  or water pump) and can  
put such
a load on the engine that it  appears to be a miss.  Check condition  
of the
serpentine  belt for any excessive wear.  A long screwdriver (plastic  
end  to the
ear) or mechanics stethoscope can help isolate the noise source  if  
you don't
find any visual indications.

You will  want to check for DTCs and clear them also.  Oil from the   
crankcase
vent system will deteriorate the intake hose and cause it to  crack at  
the clamp,
so this part may just be a common  issue.

Tom






**************Wondering what's for Dinner Tonight? Get new twists on family 
favorites at AOL Food.      
(http://food.aol.com/dinner-tonight?NCID=aolfod00030000000001)