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Noisy EGR Jim Herrington 9-12-02  
I have an intermittent rattling noise which seems to come from my Triton V10 powered Bounder at cruise speeds of 60 -65mph and between transmission shifting when the engine is not under load (not accelerating hard). It does not sound like pre-ignition. I suspect a noisy egr valve.

I would appreciate any other ideas.

Jim
Re: Noisy EGR LHyzer 9-16-02  
What year is your V10? In 1998 some transmissions needed spacers placed in the trans to eliminate what sounded like rattling of thin metal.

You could hear this noise after you started the engine. I don't know for sure if this is your problem though.

If you hear it when you first start it up at idle it may be the cause.

Problem was that it didn't do it all the time. And was hard to locate.
Re: Noisy EGR Joe 9-16-02  
What year is your coach, and how many miles are on it? There is a possibility that what you are hearing is worn connecting rod bearings. Ford uses a copper lead (very hard) bearing in the high output engines. Sometimes they wear and also wear the crank. When there is no load on the engine and it is turning consistant RPM with no load the rods will rattle. The best test is to rev your hot engine to 1500 or 2000 rpm and hold it there for several seconds and see if you get the rattle. If not we'll looke elsewhere...probably not the EGR valve. Don't get scared yet, it's just that I have had two of these this year with the same problem.
Re: Noisy EGR Jim Herrington 9-18-02  
Thanks for the reply. The engine is in a 2001 Bounder, 7500 miles total miles. The rattle isn't there all the time, only between shifting and sometimes at cruise when not accelerating. I am unable to get it to rattle when reving the at from idle. The sound doesn't seem to be coming from deep in the engine - more external. I suppose my best bet is to take it to the Ford folks to see what they can figure out. The biggest problem there is it will be hard to convince them of a real problem because it being intermittent.

Thanks again!
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