What size is the ac belt on a 2.5? - Alfa Romeo Bulletin Board & Forums
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post #1 of 31 (permalink) Old 01-19-2017, 04:42 PM Thread Starter
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What size is the ac belt on a 2.5?

Parts store says 15370. That one is WAY too long. I know the real answer is to order from one of the vendors, but I was hoping to pick one up locally.

BTW, I do not have the old one to match up since I bought the car in pieces.

Al

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post #2 of 31 (permalink) Old 01-20-2017, 03:25 PM
Del
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This is a little bit of a problem, as even the Alfa a/c belt is difficult to fit on, and the readily available ones from the regular auto parts stores are either too loose or too tight. Part of the problem is that the Alfa belt is slightly narrower than the auto parts store version, thus the store bought belt doesn't fit down further into the vee of the pulleys. The other problem is that the idler doesn't have enough travel to properly take up the slack of any longer belt.

I think I used the closest but longer store bought belt, removed the idler, installed the belt, and then reinstalled the idler, ending up with the idler moved all the way, and a slightly loose belt. Works ok though. Don't use a/c much here in Seattle.

Some use the Alfa belt, sort of start it on the pulleys and then rotate the crank to force the belt onto the pulley crank. I didn't do this because I was worried about harming the belt. They don't stretch worth a darn, lol.

I think the alternator belt is the same situation, a pain to put a new one on. Haven't done that yet, but at 100k miles, should soon, has a couple of small cracks. I suppose I will try the Alfa supplied belt and force it on via turning the crank because the alt doesn't have enough swing for much adjustment. You have to cut the old one off.

Del

Seattle

1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6

Last edited by Del; 01-20-2017 at 06:33 PM.
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post #3 of 31 (permalink) Old 01-20-2017, 03:37 PM Thread Starter
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Well, at least that explains the cut-up belts that came with the car. Guess I need to order the real ones.
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post #4 of 31 (permalink) Old 01-20-2017, 04:22 PM
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Originally Posted by radioal View Post
Well, at least that explains the cut-up belts that came with the car. Guess I need to order the real ones.
Yes, they are just about impossible to get off. We tried everything last time and had to cut it off in the end.

Current Alfas
2010 159 ti 1750 TBI sedan (red).
2004 GT 3.2 V6 (Stromboli Grey).
2008 159 TI Sportwagon 2.4 JTDM (Stromboli Grey).
1987 75 3 litre (red). My first 75 and now my son's.
2000 156 2 litre Twin Spark, ( Cosmos Blu metallic), my daughter's car.
2000 156 Monza Twin Spark, (Cosmos Blue metallic), son’s girlfiend’s car.
1999 GTV 3 litre 24 valve V6, metallic black, (son’s new car).

Non Alfa
1988 Range Rover Classic Highline 3.9 V8

Past Alfas
1989 75 3 litre, written off by runaway van.
1990 75 3 litre Potenziata (black), now sold & living in Newcastle NSW.
1990 75 3 litre Potenziata (grey, sadly deceased due to fire).
1982 GTV 2 litre, red, (daughter's first Alfa)
2 x 1992 164s, (1 red, 1 grey).
2 x 1988 33s, (both red).
1985 GTV 2 litre, (white).
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post #5 of 31 (permalink) Old 01-20-2017, 06:32 PM
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As far as I'm concerned, Alfa missed with the Milano on designing in enough clearance for easy belt installation and adjustment for the various belts, esp if you have to basically use a rare unique belt size and brand. And, if you cut the old belt off, and you don't have a proper replacement, you are stuck.

Del

Seattle

1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6

Last edited by Del; 01-20-2017 at 06:34 PM.
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post #6 of 31 (permalink) Old 01-20-2017, 09:45 PM
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I purchased five Milano AC belts from the UK. The size is 903 mm and you can buy them online. I tried using 890 mm and 915 mm belts and both did not work.
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post #7 of 31 (permalink) Old 01-20-2017, 09:47 PM
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I need a Milano AC tensioner pulley with a good bearing. I am going to replace the bad bearing, but need to machine part of the pulley to remove the sealed ball bearing.
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post #8 of 31 (permalink) Old 01-20-2017, 10:34 PM
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A #7345 belt will 'just' work. A little loose, not taut, after tightening the idler all the way, but at least you can get it on with a little work, and it drives the a/c pump without slippage so far at partial throttle. Might be slightly loose for high rpm but not a real big deal, as all it would is squeal and/or smoke slightly. It sure as heck is not going to come off.

Del

Seattle

1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
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post #9 of 31 (permalink) Old 01-21-2017, 05:17 AM
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Autozone 15348 this is the one I used. I experimented and this was the one!

AlfasRule!

1972 Montreal (The Pumpkin)
1975 Alfetta Sedan
1975 Alfetta Coupe Race Car
1982 Spider
1984 GTV-6
1984 GTV-6 Verde (GiGi)
1987 Milano (Da NEW Winta Beata)
1987 Milano Verde(Da kREDden Mobile)
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post #10 of 31 (permalink) Old 01-21-2017, 05:21 AM Thread Starter
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That's what I wanted the hear! Off to autozone...

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post #11 of 31 (permalink) Old 01-21-2017, 05:21 AM Thread Starter
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Wanted to hear. Still learning to type on a tablet.

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post #12 of 31 (permalink) Old 01-21-2017, 09:06 AM
Del
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when I tried that one from Autozone, it didn't work, couldn't get it mounted or something. Don't remember now, but I had to return it.

Del

Seattle

1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
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post #13 of 31 (permalink) Old 01-21-2017, 09:20 AM
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Like I went there and bought 3 different sizes, didn't care I can use them on the older cars and this one fit the best, I also use the same one for the alternator. 15348
They let me go back in the store and I matched the 15345, 15348 and 1535X(smallest number) and the 348 worked just fine. They were only ~$8.00 a piece and I didn't care. Engineering costs money, well I can use the others on my 75's.
These belts work for GTV-6's as well since all is the same.
MAKE SURE you Mount the belt on the INNER PULLEY of the compressor!! BAD things happen if you don't!
Ask Cousin Betsie!
Easy to get off, just need a piece of wood wedge and crank the motor, put it on the crank 1/4th of an inch I use a marshmallow stick break it to 6" and jam it turn the motor over off!!

AlfasRule!

1972 Montreal (The Pumpkin)
1975 Alfetta Sedan
1975 Alfetta Coupe Race Car
1982 Spider
1984 GTV-6
1984 GTV-6 Verde (GiGi)
1987 Milano (Da NEW Winta Beata)
1987 Milano Verde(Da kREDden Mobile)

Last edited by alfasrule; 01-21-2017 at 10:22 AM.
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post #14 of 31 (permalink) Old 01-21-2017, 04:36 PM
Del
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I do notice that your Milano is an 87. Maybe the 89 is a little different. It did not fit. Tried all the usual tricks.

Del

Seattle

1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27

previously owned since 1964:

62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6

Last edited by Del; 01-21-2017 at 05:00 PM.
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post #15 of 31 (permalink) Old 01-21-2017, 05:18 PM
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I have a 1987 Milano Silver and 1988 Milano Verde and both use the 903 mm belt. I tried many belts and even removed metal from part of the compressor and the belt was either too tight or too loose. The reason why I finally purchased five belts Dayco A13 0915 or 17360. The belt is a little longer than the original belt, but it works. You can buy them on eBay for $8.95 each and the seller is in the US.

Last edited by kuni123456; 01-21-2017 at 05:24 PM.
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