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Old 12-13-2017, 03:58 PM   #1
cityhawk
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Default Idler pulley bearing

I stumbled across this thread where OldNuc says that you can replace the idler pulley bearing with a 6203 bearing. How hard is it to replace this bearing and is this a better idea than buying a new idler pulley?

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Old 12-13-2017, 04:02 PM   #2
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Default Re: Idler pulley bearing

Perhaps this bearing?

https://www.autozone.com/batteries-s...e&newYmme=true

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Old 12-13-2017, 04:10 PM   #3
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Default Re: Idler pulley bearing

Not if the picture is correct. What is shown is open on at least one side, you need "double-sealed". 6203 defines the basic bearing size, but suffixs like "ZZ" specify sealing, shielding, grease used, grade, etc. The price seems a bit high, but I usually go to a commercial bearing supplier, and it has been a while since I bought any.

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Old 12-13-2017, 09:06 PM   #4
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Default Re: Idler pulley bearing

Thanks BillR

Does anyone have an answer to my first post in this thread?

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Old 12-13-2017, 09:28 PM   #5
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Default Re: Idler pulley bearing

Do you mean how hard is it to do? I haven't done one of those but think it would be fairly easy. Certainly some pressing is involved, but it is a small bearing with symmetric housings and such; much easier to set up properly than a front wheel bearing. And, probably no fierce snap-ring! Regardless, avoid any use of a hammer during either the removal or installation. For a small simple bearing like this, a "press" could be merely a jack, socket/pipe, and a big weight (like a car) to push against.

I did take a peek, those 6203 double-sealed bearings seem to be available on-line in the $2-5 range. The high-priced $5 one is SKF.

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Old 12-13-2017, 09:59 PM   #6
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Default Re: Idler pulley bearing

Quote:
Originally Posted by cityhawk View Post
I stumbled across this thread where OldNuc says that you can replace the idler pulley bearing with a 6203 bearing. How hard is it to replace this bearing and is this a better idea than buying a new idler pulley?
You can replace the bearing in a Metal idler or tensioner pulley, plastic pulleys are not simple to do. The primary criteria is that the outer rim of the pulley does not have a sharp edge worn into it by the belt, if it does it is a paper weight. As long as you apply force to the outer race ONLY you can swap it out/in with a hammer and socket, it is not in there very tight. You need a quality double sealed bearing size 203. The "6" indicates the quality fit and is about all you will see so a 6203 double sealed is what you want. Every manufacturer has a slightly different methods of indicating double sealed so the code is of minimal interest. Google your location for Motion Industries or Bearing Supply to see what is close. A decent quality will be in the $5,00 range. Swapping out metal for plastic may be the better choice as long as you can afford the price difference which should be minor.

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Old 12-13-2017, 10:32 PM   #7
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Default Re: Idler pulley bearing

Thanks Nuc. How about I replace the whole thing with one of these:

https://www.rockauto.com/en/moreinfo...267017&jsn=345

or

https://www.rockauto.com/en/moreinfo...sn=346&jsn=346

Both are steel.

If so, either one preferable?

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-13-2017, 10:43 PM   #8
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Default Re: Idler pulley bearing

There's also this one, if I want to buy one locally quickly:

https://shop.advanceautoparts.com/p/...m=idler+pulley

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-13-2017, 10:51 PM   #9
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Default Re: Idler pulley bearing

Apparently, there's a Motion Industries in Somerville, which is close (my work takes me into Somerville daily).

I think my pulley is still ok, though I believe it's original (making it 25 years old). I'm just trying to find the easiest and quickest quality fix.

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-13-2017, 10:56 PM   #10
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Default Re: Idler pulley bearing

If it wobbles and makes noise it is due for replacement and if it is original then a complete replacement is best approach.

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Old 12-14-2017, 06:43 AM   #11
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Default Re: Idler pulley bearing

I meant the pulley itself. I t is making a noise... wobbles a little so the bearing must be shot... But yeah, I was thinking of replacing the whole thing.

...
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1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-14-2017, 04:56 PM   #12
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Default Re: Idler pulley bearing

I went through this last spring. I bought the bearing but couldn't get the old one out of the pulley since I don't have access to a press. So then I just went ahead and replaced the entire pulley. While at it, I recommend you also replace the pully on the tensioner and the belt itself. One last thing, locally I could only find some of the pulleys in plastic. I ended up having to order both my tensioner and idler pulley online in order to get metals ones.

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Old 12-14-2017, 06:39 PM   #13
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Default Re: Idler pulley bearing

I replaced it today with the pulley listed above from advance auto parts. What a difference! For a number of years when I started the car on the really cold day it made a sound like a power steering pump that was low on fluid. Eventually the sound died down as the car warmed up. I just always assumed that sound was the power steering pump. Recently that sound got louder and kept on going after the car warmed up. I thought maybe I really was low on power steering fluid so I checked that and it was fine. Then the sound started to get louder and raspier and didn't sound so much like a power steering pump anymore. I loosen the tensioner on the belt and tried spending some of the police and the tensioner seemed a little bit crusty and a tiny bit wobbly. Given that that's the original tensioner that's 25 years old and 182,000 miles on it I figured that was the likely culprit. It was an inexpensive thing to try. So I tried it and Vpila! I don't remember a time when the engine was so quiet.

As to the tensioner, I replace that with an oem one two or three years ago.

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-14-2017, 06:47 PM   #14
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Default Re: Idler pulley bearing

By the way, when I took out the old one the bearing was really crusty.

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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Old 12-14-2017, 07:41 PM   #15
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Default Re: Idler pulley bearing

Quote:
Originally Posted by cityhawk View Post
I replaced it today with the pulley listed above from advance auto parts. What a difference! For a number of years when I started the car on the really cold day it made a sound like a power steering pump that was low on fluid. Eventually the sound died down as the car warmed up. I just always assumed that sound was the power steering pump. Recently that sound got louder and kept on going after the car warmed up. I thought maybe I really was low on power steering fluid so I checked that and it was fine. Then the sound started to get louder and raspier and didn't sound so much like a power steering pump anymore. I loosen the tensioner on the belt and tried spending some of the police and the tensioner seemed a little bit crusty and a tiny bit wobbly. Given that that's the original tensioner that's 25 years old and 182,000 miles on it I figured that was the likely culprit. It was an inexpensive thing to try. So I tried it and Vpila! I don't remember a time when the engine was so quiet.

As to the tensioner, I replace that with an oem one two or three years ago.
Mine makes that exact noise, I figured it was the PS pump as well, but maybe Ill try the idler and tensioner and replace the belt while I am there.

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Old 12-14-2017, 07:53 PM   #16
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Default Re: Idler pulley bearing

btw, I tried spinning some of the pulley, not spending the police. Damn speech to text. it's good, but still not perfect!

...
Saturns:
1993 SW2 MT 182,000 hard Boston city miles ("Rozzie")
Gone but not forgotten:
2001 LW300 ("Elle")
1999 SW2 MT
Project cars:
1966 Corvair Monza convertible
1928 Ford Model A Tudor Sedan

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