Engine Pulley ??? - Forums at Modded Mustangs
 
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post #1 of 17 Old September 10th, 2012, 11:49 PM Thread Starter
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Engine Pulley ???

Hi guys im new to the board. I came here cause it seems like i find the best answers while roaming these forums before but I have a question that i couldnt find while searching. While trying to fix up my 3.8 to where it doesnt sound like its falling apart my local shop said i had a pulley going out. I've been looking around trying to find out if I had to replace one or all...if i have to replace all are there any kits that come with udps that you guys know of. Thanks for the help in advance.


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post #2 of 17 Old September 11th, 2012, 02:52 AM
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Im guessing the shop just went by ear on their judgement and didnt tell you which pulley did they? UDPs on 3.8s are just the crankshaft and alternator pulley. But since the shop didnt give you a direct answer to which one is making the noise, I doubt getting underdrives will fix your problem.

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post #3 of 17 Old September 11th, 2012, 09:29 AM
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Possibly the tensioner pulley? To my knowledge no other pulleys "go out", the piece of equipment they drive are usually what goes out, i.e. the powersteering pump, a/c clutch/compressor etc. I could be wrong, but I doubt it

My suggestion would be to find another shop, or post a vid with the sound in question.

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post #4 of 17 Old September 11th, 2012, 11:45 PM Thread Starter
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so what your saying veesicks is that it could be be the altinator(which i was going to upgrade), the water pump, or anything that uses the pulley system to run could be gettig ready to crap out? i think ill corral my neighbor one morning cause he is the mechanic at a body shop here in town.
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post #5 of 17 Old September 12th, 2012, 11:23 AM
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That is exactly what I was saying, once you can locate which piece of equipment is making the noise, then you'll know what to replace. The tensioner and idler pulleys do not drive anything, so it is common practice to say those pulleys are going out/went out, as for the rest, you have the idea. Let us know what you find out

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post #6 of 17 Old September 12th, 2012, 02:23 PM Thread Starter
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well im just going to start with the alt since it whines anyway.
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post #7 of 17 Old September 13th, 2012, 04:19 PM
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It's more than likely a tensioner or idler pulley. It would take all of a minute to diagnose, rather than wasting money on parts that may not need to be replaced.

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post #8 of 17 Old September 13th, 2012, 06:30 PM
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I had an idler pulley go back in my ranger. That thing squealed like a SOB everytime I let off the gas at 20mph and less. Made pulling up to houses and intersections incredibly embarrassing.. Was just a pulley that ended up not costing too much if I remember correctly. Was under $100 I know that
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post #9 of 17 Old September 16th, 2012, 01:11 PM Thread Starter
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are the idler pulleys from autozone good for replacement....i did some searching on vids across google and youtube and found how to check them and found the idler pulley is grinding and spins fast when turned by hand..another question if the tensioner is taking alot of force to pull up on to move is that good or bad...plus i was going to change the alt anyway since i was going to upgrade my headlights and drop a lower end sub system in the trunk to help fill out musical sound.
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post #10 of 17 Old September 16th, 2012, 04:26 PM
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I don't see why an idler pulley setup from AZ would be a bad choice... Wouldn't be my first choice, but that is personal preference. The alternator however, should most definitely come from a more reputable source. Just my $0.02.

The tensioner needs to have a good amount of tension on it That is the purpose of it, keeps the belt nice and tight. Tight like a tiger

M90 setup done, and slightly running lol. Working on self tuning now

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I've got Rembrandt as my right hand, and Solo as my pilot.
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post #11 of 17 Old September 16th, 2012, 05:36 PM Thread Starter
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well i just found out that a sound system buddy of mine is now workin at our local AZ and he said just to rebuild my stock alt cause it will hold the accent lights for the inside, new headlights, and my subs/amp i want to put in my trunk....they have my idler pulley in stock for 17.90 right now
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post #12 of 17 Old September 16th, 2012, 08:34 PM
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Quote:
Originally Posted by KrimsonKnight View Post
are the idler pulleys from autozone good for replacement....
That will be fine.

Quote:
Originally Posted by KrimsonKnight View Post
another question if the tensioner is taking alot of force to pull up on to move is that good or bad...
That is good.

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post #13 of 17 Old September 16th, 2012, 09:45 PM Thread Starter
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i gave you guys some good rep for the help and guiding me
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post #14 of 17 Old September 16th, 2012, 09:55 PM
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Replaced my Idler Pulley, it made it super quiet.. Just did it today..




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post #15 of 17 Old September 16th, 2012, 11:50 PM
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Quote:
Originally Posted by KrimsonKnight View Post
well i just found out that a sound system buddy of mine is now workin at our local AZ and he said just to rebuild my stock alt cause it will hold the accent lights for the inside, new headlights, and my subs/amp i want to put in my trunk....they have my idler pulley in stock for 17.90 right now
You talkin about Danny? I got a system as well in my sixxer :p




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post #16 of 17 Old September 17th, 2012, 02:02 PM Thread Starter
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got the autozone idler pulley and put it on in like 15 mins. putting pics up under the what did you do to your sixxer post when i get to a wireless spot....damn ps vita not being on 3g. yes mustang girl im talking about danny....first time i seen him outside of crush's i was like arent you that kid that works at crush's
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post #17 of 17 Old September 18th, 2012, 05:31 PM
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Originally Posted by KrimsonKnight View Post
well im just going to start with the alt since it whines anyway.
a whine could be the water pump rubbing the timing cover, mine did this and most noobs think its a super charger. it was not even loose on the bearing and no leaking in the wheep hole.
note: tensioner pulley bolt is most likely reverse thread bolt.
idler pullley is normal thread.
if its not too loose you can use a exacto knife to remove the bearing dust shields to add grease and prolong its life, also will make it quiet.
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