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Unread 09-04-2002, 06:21 PM   #1
bombo
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Join Date: Sep 2001
Location: VA/NY/MA
Posts: 5
Whining

I put a new engine in my 1980 CJ7 last year and have driven it lightly since... it drives great with the new 258 and a Weber carb. But there is a whining sound that seems loudest after the engine is driven for a bit and warmed up. It is loudest at idle and decreases to nonexistent at driving speed.

During the reinstall a small capacitor type thing that was attached to the coil came off and broke and I haven't been able to find a replacement. I'm guessing that isn't good, but most operations are normal so far. So:

A) What was that thing?
B) Where do I get one?
C) Could it cause the whining?
D) If it isn't the cause, what could be?

Thanks...

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Unread 09-04-2002, 09:07 PM   #2
CSP
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Join Date: Aug 2002
Location: Colorado
Posts: 12,427
Where is the whining coming from? The capacitor is there to reduce feedback noise in your radio. That's all it does. It's hard to tell if it's the cause of the whining without knowing where the whining is coming from.
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Unread 09-05-2002, 08:15 PM   #3
beardedcj7
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Join Date: Sep 2002
Location: Southern MS
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whining

my '83 cj7 recently started making the same whining noise as yours did, more prevalant at low to idle speeds, i checked my power steering fluid and it was almost gone, so i added some more and it quieted the whining tremendously but it hasn't stopped, i figure it may be because the pump had to run almost dry before i noticed it, that may not be it but its my guess. let me know if you find out what it is. thanks
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Unread 09-06-2002, 03:50 PM   #4
bombo
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more info

Well can't be the power steering - don't have that...

I can't really tell where the sound is coming from as it is so loud that it's hard to pinpoint. It seems to be coming from the distributor/ alternator side of the engine but that is only a guess.

Thanks for the posts...
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Unread 09-09-2002, 09:32 AM   #5
boredstiff
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Join Date: Dec 2001
Location: Fenton, MI
Posts: 64
noise

well, if you haven't found the whine, remove your alternator belt and start your engine. See if it goes away... if not at least you can rule out the alternator/water pump...
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Unread 09-09-2002, 01:14 PM   #6
kasper37
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Join Date: Aug 2002
Posts: 17
how to trace down the noise

get one of these:

http://www.ipstool.com/PRODUCTS/Mech...ethoscope.html

they are very helpful when trying to trace down engine noises and are well worth the cheap price...

dan
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Unread 09-09-2002, 01:34 PM   #7
johny1i
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Join Date: Mar 2002
Location: Crestview, Florida
Posts: 782
try spraying your fan belt with some WD-40 also. you can do it while it's running, but watch out for the fan! Like Jeeba said, belts can cause some weird sounds, and this will silence them.
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Currently an '86 CJ-7 and a '77 CJ-7 Golden Eagle---#4 and 5 following a '01 Sahara, '90 Sahara, and '85 CJ-7....
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