Ask Your Car Question. Car Experts Answer You ASAP.

(Not a Car Question?)

Hi I have a 1996 mustang cobra double overhead cam 4.6 I ...
Sent to Car Experts August 31 02:28 AM

Hi I have a 1996 mustang cobra double overhead cam 4.6 I have a paxton supercharger less than 8 lbs of boost and I just put on bassani headers. My question I have a strange noise coming from my timing chain or from my cam chains, and I have never heard this before, could the headers cause any new problems. I always change the oil at 3000 miles with syn mobil 1. 83,000 original miles. it sounds like a cement mixer right now until you give it revs?????    thanks     Dale

 

Optional Information:
1996 Ford cobra 4.6 dbl cams

Already Tried:
Just listening and ready to break down valve covers and timing chain.

Customer (name blocked for privacy)
Status:  Closed   Value: $8
Info Request
August 31 11:24 AM (8 hours and 55 minutes and 24 seconds later)
         
REPLIED to Info RequestCheck Mark
Did this noise happen imediately after the headers were put on?
Picture
BOBBY -- Technician/ Service Advisor -- 100% Positive Feedback on 1046 Car Accepts
ASE MASTER CERTIFIED, CALIFORNIA EPA AIR CONDITIONING CERTIFIED, AA DEGREE AUTOMOTIVE/DIESEL TECH
Reply
September 7 11:12 AM (6 days and 23 hours later)
         
Reply to BOBBY's Post: Hi No a week later and about 500 miles of driving the car, the noise was just there nothing really happended. It sounds like a timing chain guide or something to me but it's a lot of work to start removing stuff becoz I have the supercharger in the way too. I still think it has something to do with headers??? The clacking noise goes away with some revs put on the engine too!!!
Customer (name blocked for privacy)
Answer
September 7 11:15 AM (3 minutes and 49 seconds later)
         
REPLIEDCheck Mark
The headers themselves will be slightly noisey. They will actually cause sort of a clacking sound. It is strange though if it didn't happen immediately after they were put on. Does the sound appear to be coming more from the front of the engine or the header area.
Picture
BOBBY -- Technician/ Service Advisor -- 100% Positive Feedback on 1046 Car Accepts
ASE MASTER CERTIFIED, CALIFORNIA EPA AIR CONDITIONING CERTIFIED, AA DEGREE AUTOMOTIVE/DIESEL TECH
Reply
September 7 1:50 PM (2 hours and 34 minutes and 56 seconds later)
         
Reply to BOBBY's Post: my mechanic used an engine stethoscope and did'nt really pinpoint it for me. But no it is not coming from the exhaust area. However, the bassani pipes have a "collecto" which does reverberate some of this sound. But it is a much larger clacking sound I guess on top of the engine.
Customer (name blocked for privacy)
Answer
September 7 4:04 PM (2 hours and 13 minutes and 25 seconds later)
         
ACCEPTEDCheck Mark
And you really only get the noise at idle? Does the tone of the noise change at all when the engine warms up?
Picture
BOBBY -- Technician/ Service Advisor -- 100% Positive Feedback on 1046 Car Accepts
ASE MASTER CERTIFIED, CALIFORNIA EPA AIR CONDITIONING CERTIFIED, AA DEGREE AUTOMOTIVE/DIESEL TECH
Reply
September 7 4:38 PM (34 minutes and 23 seconds later)
         
Reply to BOBBY's Post: no change at warmup but revs make it go away!!
Customer (name blocked for privacy)
Reply
September 7 9:39 PM (5 hours and 57 seconds later)
         
well I guess this is'nt going tell me anything I did'nt already know so that's it
Customer (name blocked for privacy)
Answer
September 8 12:06 AM (2 hours and 27 minutes and 6 seconds later)
         
ACCEPTEDCheck Mark
It does sound like you have some looseness in the timing chain. Just to be sure though, this is a long shot, double check your heat shields near your catalytic converters. These have a tendancy to come loose and reverberate through the manifolds.
Picture
BOBBY -- Technician/ Service Advisor -- 100% Positive Feedback on 1046 Car Accepts
ASE MASTER CERTIFIED, CALIFORNIA EPA AIR CONDITIONING CERTIFIED, AA DEGREE AUTOMOTIVE/DIESEL TECH
Reply
September 8 12:46 AM (40 minutes and 15 seconds later)
         
Reply to BOBBY's Post: Thanks that's a really good idea!!
Customer (name blocked for privacy)
Answer
September 8 12:55 AM (9 minutes and 3 seconds later)
         
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
Picture
BOBBY -- Technician/ Service Advisor -- 100% Positive Feedback on 1046 Car Accepts
ASE MASTER CERTIFIED, CALIFORNIA EPA AIR CONDITIONING CERTIFIED, AA DEGREE AUTOMOTIVE/DIESEL TECH
Think you can answer this question?
Login or Become an Expert

Related Answers

 

DISCLAIMER: You acknowledge that any information you may obtain from individuals you contact through use of the Just Answer service comes from those individuals, not from Just Answer!, and that Just Answer is not in any way responsible for any of the information these third parties may supply. The site and services are provided "as is" with no warranty and no representations are made regarding the qualification of an Expert. Responses and comments on Just Answer! are for general information and are not intended to substitute for informed professional advice (such as medical, legal, investment or accounting) and do not establish a professional-client relationship. Just Answer! is not intended or designed to address EMERGENCY QUESTIONS which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service.

Just Answer! > Car Repair