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Old 12-06-2014, 11:27 PM   #1
performanceisland
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Default m44 engine idler pulley

Is there supposed to be a second idler pulley on a 98 318ti, the one that would be the top one above the tensioner one next to and closest to the oil filter housing, see my pics, I don;t know if I'm missing it or if the later ti's don't have them, I certainly do have the threads for it.
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Old 12-10-2014, 12:12 AM   #2
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anyone on here with a 98 or 99 ti, please check to see if you have this pulley, thanks.
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Old 12-10-2014, 03:39 AM   #3
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My '97 has one. I'll take a pic of it for you tomorrow.
LouM...

Edit: RealOEM shows one for the '98.

Last edited by LouM...; 12-10-2014 at 03:42 AM.
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Old 12-10-2014, 05:15 AM   #4
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96 M44


95 M42


Cheers!
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Old 12-10-2014, 05:19 AM   #5
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Hey I just ran outside to check my 98... no pulley... exact same as you have it. Sorry no pic... snorkel etc in the way for night time pic.
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Old 12-10-2014, 05:25 AM   #6
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I'll look at my 98 tomorrow.
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1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

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1995 318ti Active - RIP
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Old 12-10-2014, 05:44 AM   #7
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Geez after looking thru the inter webs, i may be missing mine as well. :/
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Old 12-10-2014, 06:04 AM   #8
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I figure I better check before it storms tomorrow...

98 M44 - No upper tensioner pulley




Wonder why?
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1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2000 2.3L Z3 / 1997 1.9L Z3 / 1991 318ic / 1999 540it

1997 318ti Sport - "Huera" - RIP
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Old 12-10-2014, 09:05 AM   #9
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My 1998 318ti M44 engine have only pulley, one at the A/C Compressor Belt Drive and the other one is at the Water Pump/Alternator Belt Drive. See attached
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Old 12-10-2014, 09:21 AM   #10
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If you want to save money when replacing the Mechanical Belt Tensioner (item #2), from the previous attachment, you can just replace with item # 6 (Adjusting Pulley), see the attachment but make sure the Mechanical Belt Tensioner is serviceable otherwise replace the Mechanical Belt Tensioner Assembly.
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Old 12-10-2014, 02:50 PM   #11
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thanks guys!!! so here is my thought, why do the later ti's not have the pulley? if you look at my pic in the first post, without the pulley the belt barely grabs only 25% (90 degrees) of the alternator pulley, still spins fine, but wouldn't you be better off as a precaution to have this pulley installed? at which time the belt would grab about 50% of the pulley (180 degrees)? I'd love to know the reasoning behind 98-99s not having them.
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Old 12-10-2014, 02:53 PM   #12
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after searching bfc it's varied on bigger engines too.
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Old 04-26-2015, 12:10 AM   #13
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Default My 98 doesn't have it, BUT...

...found the spacer for the pulley lodged within the Intake Sandwich recently when I had it apart. So did mine originally have it and the PO took it off? Highly likely. PO had lots of things apart on the car over the years. One less pulley would mean less tension on the belt drive system, but since I found the spacer loose in the engine I'm guessing mine originally had the idler pulley.

I bought the pulley so I'm going to see what happens....
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