New Product: Adjustable Tension Alternator Bracket For 79-91
05-14-13 | 04:09 PM
#1
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Joined: Jan 2008
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From: Indiana
New Product: Adjustable Tension Alternator Bracket For 79-91
We have developed our Adjustable Tension Alternator Bracket kit for use on 79-91 12A & 13B engines. The purpose is to allow users to achieve the correct level of belt deflection. The spec is:
New Belt: 12-15mm @ 10kg
Used Belt: 14-17mm @ 10kg
We find that most owners simply put a pry bar under the alternator and hope they achieve the proper level of tension. This was the technique that was used for most cars up unto the 90's when Mazda incorporated an adjustable tensioner on the FD and Cosmo.
For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings. Below is a pic of excessive front stationary gear bearing wear.
Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.
We have even seen a few cracked water pump housings at the alternator pivot point from extremely over-zealous owners.
Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.
New Belt: 12-15mm @ 10kg
Used Belt: 14-17mm @ 10kg
We find that most owners simply put a pry bar under the alternator and hope they achieve the proper level of tension. This was the technique that was used for most cars up unto the 90's when Mazda incorporated an adjustable tensioner on the FD and Cosmo.
For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings. Below is a pic of excessive front stationary gear bearing wear.
Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.
We have even seen a few cracked water pump housings at the alternator pivot point from extremely over-zealous owners.
Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.
Last edited by Banzai-Racing; 05-14-13 at 04:19 PM.
05-14-13 | 04:14 PM
#2
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Joined: Jan 2008
Posts: 4,834
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From: Indiana
New Adjustable Tension Bracket:
Product can be purchased on our site: http://banzai-racing.com/store/86-91...lley_belt.html
The threaded hole on the alternator does need to be drilled out for the adjuster to be installed. If you have already installed an FD alternator there is no modification required.
Product can be purchased on our site: http://banzai-racing.com/store/86-91...lley_belt.html
The threaded hole on the alternator does need to be drilled out for the adjuster to be installed. If you have already installed an FD alternator there is no modification required.
Last edited by Banzai-Racing; 05-14-13 at 04:23 PM.
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05-15-13 | 01:48 PM
#9
Just take the blue pill..
Joined: May 2003
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From: EU
07-02-13 | 10:55 AM
#14
Can Post Only in New Member Section
Joined: Jul 2013
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From: Bhopal
Adjustable Tension Alternator Bracket For 79-91
Adjustable Tension Alternator Bracket kit for use on 79-91 12A & 13B engines. The purpose is to allow users to achieve the correct level of belt deflection.
For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings.
Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.
Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut steel, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.
Please read and follow instructions carefully to ensure correct installation
Tools Required
* Ratchet
* 12mm, 13mm & 14mm Sockets and/or wrenches
* Drill with 5/16" bit (ONLY for FC Alternator)
Procedure
1. If removing alternator from the car disconnect the battery.
2. Using 14mm and 12mm tools loosen and remove alternator and factory bracket
3. On an FC alternator, drill out the threaded hole using a 5/16" drill bit identified in pic #1.
4. Attach new bracket to alternator as pictured in #2 & #3
5. Reinstall alternator.
6. Adjust tension; the deflection spec:
* New Belt: 12-15mm @ 10kg
* Used Belt: 14-17mm @ 10kg
2013 MERCEDES BENZ SL-CLASS
For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings.
Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.
Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut steel, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.
Please read and follow instructions carefully to ensure correct installation
Tools Required
* Ratchet
* 12mm, 13mm & 14mm Sockets and/or wrenches
* Drill with 5/16" bit (ONLY for FC Alternator)
Procedure
1. If removing alternator from the car disconnect the battery.
2. Using 14mm and 12mm tools loosen and remove alternator and factory bracket
3. On an FC alternator, drill out the threaded hole using a 5/16" drill bit identified in pic #1.
4. Attach new bracket to alternator as pictured in #2 & #3
5. Reinstall alternator.
6. Adjust tension; the deflection spec:
* New Belt: 12-15mm @ 10kg
* Used Belt: 14-17mm @ 10kg
2013 MERCEDES BENZ SL-CLASS
07-02-13 | 11:00 AM
#15
Thread Starter
Joined: Jan 2008
Posts: 4,834
Likes: 318
From: Indiana
That would be from our installation instructions posted on our website. Alternator Bracket Kit Installation Instaructions
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