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whats this rattling? it only does it when i go like 70 and over and then it stops after a mile or 2?
it almost sounds like my engine is blown, but then it goes away.
4 Answers
- JT B ford manLv 61 decade agoFavorite Answer
The valves are making that noise put premium in the tank for a while and see what happens, I had a Ranger that did that and it cured the problem and slow down you will live longer. :-)
Source(s): 36 years @ ford motor co repairman - 1 decade ago
So your doing 70mph or something like 70mph?
I would need more information to give you better help, but it could be a heat shield rattling at certain speeds due to vibrations at only certain speeds. Are you sure it's engine noise and not suspension, or transmission related?
- SmoothieLv 51 decade ago
You have a natural frequency vibration in your car. Don't drive at that speed very long. Over or under and you'll be fine.
Source(s): EDIT: All structures have a "natural frequency". Remember science class? The structure will begin to vibrate uncontrollably when subjected to it's natural frequency, but it's a very small bandwidth - in your case around 70 mph. Here's a GREAT example: http://www.answers.com/topic/tacoma-narrows-bridge and VIDEO of it: http://tools.wikimedia.de/~gmaxwell/jorbis/JOrbisP... - Anonymous1 decade ago
lose exhaust?
