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Forum Newbie
Group: Forum Members
Last Login: 6/14/2009 5:29:52 AM
Posts: 1,
Visits: 2
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| I have a 1995 E-350 with the 351 5.8L. A few months ago I started hearing a loud high pitched wining noise that seamed to be coming from the alternator. I listened with a tube but since everything is so close and sounds transfer I had a heck of a time telling exactly where it was coming from. I put in a salvage alternator and to my surprise the noise was still present. I assumed that I had just got another alternator with the same whine as mine. Just yesterday I replaced the alternator with a brand new one and it did not fix the noise. I have changed the serpentine belt, the smog pump, and the alternator and still have the problem. The noise is intermittent and fluctuates with engine rpms. It seems less prevalent when warm and at higher speeds. Idling on cold mornings will wake up the neighborhood with a whiny annoying sound that comes and goes at unpredictable intervals. The noise seems to be coming from the alternator around the middle or toward the back but it could be traveling from somewhere else. I removed the serpentine and all pulleys move freely with no noise. I have a duel battery setup and I have unhooked the secondary because the battery is the original and it is dead. Could the alternator be working to hard and causing it to make the noise? Is it ok to leave the secondary battery unhooked? Any other ideas on the noise? It is getting me frustrated not to mention it is embarrassing and scares pedestrians and animals when it suddly decides to start whining. I thank you all for any opinions or ideas.
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Forum Newbie
Group: Forum Members
Last Login: 6/14/2009 5:52:45 AM
Posts: 2,
Visits: 3
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I think i have the same problem. been doin it for a least two years but has gottin louder lately. I have 94 e150 club wagon with 65000 miles- 351 v8, 5.8L engine same as you. I change the tensioner pulley and the other one too but same whining noise. You have worked harder at it than I have,and I don,t have a clue either yet. But the wife tells me (she drives it all the time)THERE IS NOW AND OCCASIONAL "WOPP" OR "CLUNKING NOISE". I HAVE TO CHECK IT OUT. maybe related? If you find out anything please email. Same here. My secondary battery also unhooked: it died long time ago.
Hope to get it checked this weekend.
bruiser
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Forum Member
Group: Forum Members
Last Login: 6/14/2009 11:09:26 PM
Posts: 38,
Visits: 40
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Remove the surpentine belt to see if the noise goes away if not you now know its got nothing to do with the stuff driven by this belt ive heard of the cam sensor causing this Good Luck!!!
Hop
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