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  #1  
Old 10-19-2004, 09:00 PM
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Location: NC
Posts: 43
squealing engine on my 300SD

my 300 started screaming yesterday, like a loose belt but really bad. only on start ups and for about 4 minutes then it runs fine with only the deiesel purr.

i popped the hood but could not ascertain the problem. the sound seems to be coming from the passenger side of the engine under the air filter. i couldn't tell if it was a belt or not. is there an engine part that can make this heinous sound?

anyone have a clue?
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  #2  
Old 10-19-2004, 09:06 PM
1985 300SD Sady's Avatar
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How old are the belts? You should consider changing them, dont jump into something expensive, start with the cheap stuff.. Im thinking if its not the belt(s) then possibly alternator? Thats just a guess.. Anyone?
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  #3  
Old 10-19-2004, 09:12 PM
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Quote:
Originally Posted by 1985 300SD Sady
then possibly alternator? Thats just a guess.. Anyone?
will the alternator scream like this?
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  #4  
Old 10-19-2004, 09:20 PM
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Checking the belts is simple, spray a little PB or WD40 on them and see if the squel goes away for a bit. If it does, you know it's a belt.
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  #5  
Old 10-19-2004, 09:23 PM
Brandon314159
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Exhaust manifold gasket?
I just replaced mine...it squealed something furious.
Does it scream under boost if you are going down the road or up a hill?
It'll start quiet
then get louder and louder..
its not fun to do...but can be done...
Other possibility...turbo problems?
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  #6  
Old 10-19-2004, 09:35 PM
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Quote:
Originally Posted by Brandon314159
Exhaust manifold gasket?Dunno...

I just replaced mine...it squealed something furious.
Does it scream under boost if you are going down the road or up a hill?only for the first 4 or 5 minutes then it settles out.

It'll start quiet
then get louder and louder..
its not fun to do...but can be done...
Other possibility...turbo problems?that sounds spendy
......
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  #7  
Old 10-19-2004, 10:00 PM
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Angry Is your neighbor's cat missi____

HEY i am really sorry for this really ignorant joke> i hardly ever drink, but I had to go to the company party tonite and I drank 3 beers and now I am back at the office trying to sober up before I drive home,

I really apologize for offenfing anyone, I have a Cat and I am a very humane and compassionate owner..
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  #8  
Old 10-19-2004, 10:02 PM
Brandon314159
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Eh, drive it...if it develops an exhaust leak..you will know..
at first I just had a squal under load...
then it actually started the "put put put" of the exhaust leak
lemme know what it is...curious what else could make that noise.
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  #9  
Old 10-19-2004, 10:04 PM
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Quote:
Originally Posted by Carrameow
HEY i am really sorry for this really ignorant joke> i hardly ever drink, but I had to go to the company party tonite and I drank 3 beers and now I am back at the office trying to sober up before I drive home,

I really apologize for offenfing anyone, I have a Cat and I am a very humane and compassionate owner..

Call a cab dude! Call a cab!

Kevin
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  #10  
Old 10-19-2004, 10:23 PM
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Quote:
Originally Posted by Brandon314159
Eh, drive it...if it develops an exhaust leak..you will know..
at first I just had a squal under load...
then it actually started the "put put put" of the exhaust leak
lemme know what it is...curious what else could make that noise.
imma have 'earl' look at it tomorrow, i'll let you know.
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  #11  
Old 10-20-2004, 02:46 PM
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new belts $125.00
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  #12  
Old 10-20-2004, 06:46 PM
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Location: Savannah, GA
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Quote:
Originally Posted by WilliamJ
new belts $125.00
Ouch! From the PP catalog:
Complete Belt set for an 300SD to engine 039510 - $26.80
Complete Belt set for an 300SD from engine 039511 - $25.00


That's a complete set, not single belts.
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  #13  
Old 10-20-2004, 07:22 PM
Brandon314159
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Quote:
Originally Posted by WilliamJ
new belts $125.00
I think it cost like 10 bucks max for me to do all my belts..
But that is from a german auto import place...not the dealer
Man...the exhaust manifold gasket was only 17 bucks off fastlane...
all else fails, take all the belts off..run the engine..listen for noise..if still there..your problem isn't so simple
but don't go fork out 100+ bucks for belts!...
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  #14  
Old 10-20-2004, 08:09 PM
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I know exactly what your problem is since I had the exact same problem with my 85 300SD. It's your alternator belt and it's wore out and loose. Replace it and all noise will stop. Problem solved.
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  #15  
Old 10-20-2004, 08:30 PM
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Quote:
Originally Posted by WilliamJ
will the alternator scream like this?
Yes alternators with do that, my dads F150's alternator did it for a few years it sounded like a bad belt.
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