80 replies to this topic

[hanra]

I just noticed the fan belt on my 308 w/o Air Con is at max adjustment via the alternator adjustment. I can spin the fan if I apply some force. To me it appears the fan belt may just be a fraction too large.... I wouldn't have thought it should be at max adjustment.

Just looking at the Gates website, it's a bit confusing between a 4.2 and a 5.0 w/o Air Con. Why would the belt part numbers be different between engine sizes? Just wondering if I bought the incorrect size?

[dattoman]

Damper is the same

Front pulley is same

Water pump is same

Water pump pulley is same

But 2 different belts listed... not sure why

 

https://www.vbeltguy...tomotive-v-belt

 

https://www.vbeltguy...tomotive-v-belt

[RallyRed]

wish Yel 327 was here.....

[rexy]

Your belt should have a length printed on it. Check it's the correct one.
I would just buy one a bit smaller than your current one.

[hanra]

Check ya pullies aren't worn,will give you same result because the belts sit low in the pullies

The water pump pulley and crank pulley were both painted 2pac so that may have taken up any wear. The alternator pulley is new. I had a new alternator fitted into the orignal casing. But they used the new pulley, it is slightly different to original. Perhaps it's slightly smaller?

[S pack]

V8 with A/C use a different fan pulley to non A/C V8.

[hanra]

Yep but the part numbers listed for 4.2 & 5.0 by gates are conflicting for A/C and non-A/C cars?

[S pack]

Yep but the part numbers listed for 4.2 & 5.0 by gates are conflicting for A/C and non-A/C cars?

Wouldn't be the first time an aftermarket manufacturer doesn't know the full facts about the parts they make and the models and production options they suit.

[Ice]

wish Yel 327 was here.....

Yeah well that wont happen in a hurry

[hanra]

Have I missed something? Byron was a wealth of knowledge.

[Ice]

Have I missed something? Byron was a wealth of knowledge.

Yeah he hasnt been around for a while now

[grumpy xu1]

That's possibly because some other members question to many of his postings Gene sadly, i personaly like most of you really value his knowledge. Brad you should be able to sit the belt in each pulley & check for wear, if they all come up well I'd be inclined to go down 10 - 20 mm in belt length myself. Obviously you will have to work out if you need the 11a or 13a a check of the belt in the pulley will Determine that. Hope that makes sense to you mate. Gary.

[hanra]

Interesting. The parts book show differing part numbers also between 4.2 and 5,0?

[dattoman]

Yep...which I linked up earlier

[Shiney005]

 Brad you should be able to sit the belt in each pulley & check for wear,

If a belt is sitting low in a pulley, it could be wear in the pulley, or the belt.

 

Reading Modern Belts.

• Read the first two characters on the belt. Standard automotive belts start with "3L" or "4L." If your fan belt begins with this number/letter combination, continue on to Step 3. If it doesn't, skip to "Reading Classic Fan Belt Numbers" .

• Understand the meaning behind "3L" and "4L." Both symbolize the width of the belt. A "3L" belt measures 9.5 millimeters across, while a "4L" belt measures 12.5 millimeters.

• • Read the next characters on the fan belt. These should be numbers, not letters or a combination of the two. These numbers represent the outside length of a fan belt. The number might be 420; this means the outside circumference of the fan belt is 42 inches.

  • Combine the information from Steps 3 and 4 to figure out exactly what width and length of fan belt you need. A belt with the number "3L420" on it means it is 9.5 millimeters in width and 42 inches in length. This is the information you'll need when searching for a replacement.

  • Reading Classic Fan Belt Numbers

    • Look at the first character on the fan belt; if it's a letter instead of a number, you have a classic fan belt.

    • Understand what the letter means. The letters run A through E, and symbolize the size of the belt. An "A-belt," which is the most common, is also the smallest. An E-belt is the largest.

    • • Read the number that follows the letter. This number represents the length of the inside of the fan belt (as opposed to the number in the standard automotive belt, which represents the outside circumference). For example, if the number is 46, that means the inside circumference of the belt is 46 inches.

      • Combine the letter and the numbers to understand what kind of fan belt you need. A belt that read "B44" is a fan belt with a "B" width that measures 44 inches long on the inside of the belt.

      • Tips & Warnings
         

        • An "A" belt is roughly equivalent to a "4L" belt, and they can be interchanged.
        • The outside of a 4L fan belt is roughly two inches longer than the inside. This means a 4L420 fan belt is the same as an A40 fan belt. The outside of 3L fan belt is one and a half inches longer than the inside.
        • Some belts may also have the letter "X" included. The "X" means the belt has notches on it. Belts without an "X" are smooth.
        • All the belts described above have a 40-degree angle (this is the part that makes the belt look like the letter "V"); belts that have the letter "V" included in the product number have a 30-degree angle instead of the standard 40 degrees.

         

         

 

Edited by Shiney005, 26 March 2017 - 11:32 AM.

[hanra]

[hanra]

Yep...which I linked up earlier

Yeah those links are pretty straight forward:

5.0 with Air Con


5.0 without Air Con




But look deeper between a 4.2 and a 5.0....?

As it stands, the belt I have is for a 4.2 without Air and a 5.0 with Air.....

Edited by hanra, 26 March 2017 - 02:49 PM.

[arrimar]

The confusion in the listing of 4.2 and 5.0 belts is probably associated with the generator pulley listing in the parts book also being out of whack. It lists a different pulley for 6cyl, 8 cyl, and 5 litre. It should read 6 cyl, 8 cyl, L34.

If you want a further example of errors in "official" GMH publications try and fit the 8cyl water pump shown to a 253/308.

[hanra]

Just go buy a 11A1080 or 11A1070?

Is it that simple?

[Ando]

That alternator flat bar arm looks short as well as the slot. My 2 cars have a longer slot & a longer radial arc. 

[torana74]

looking at that pic, your alternator adjuster bracket is wrong type or mounted on the wrong bolt at timing cover.  Yes you need a shorter belt, 11a1080/70  but if you pull that alterator in on it's currrent arc, you will run the risk of the  alternator fan fouling on your bracket.  If i recall correctly, the adjusting bracket on a torana mounted on the bolt behind the balancer. Other holdens were on the lower waterpump bolt.  But i could be mistaken on that.

[torana74]

It doesn't look like you have much adjustment at all possible with the current config before either hitting bracket slot end/ fuel pump, alternator fan on adjuster. Relocating that arm to give a nicer throw would be something i'd be looking into. Or it's the wrong adjuster bracket and not enough curve on it.  I can't remember which was which but there was also a more rounded bracket that holden used