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#1
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Alternator Repair AL0734X
The 2003 X5 4.4l has the Bosch alternator A water cooled wonder on engineering. But they do go faulty at times, and the one in my car has been showing signs of doing so. So I decided to find the parts and rebuild the unit, after it cant be that difficult.
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2002 BMW 325i Touring 2003 BMW V8 4.4 2002 Land Rover Discovery 2 2002 Land Rover Freelander 1 1980 Lotus Esprit. Sold. Less work for me 1961 Jaguar MK2 Sold. One less project 1962 Land Rover Series 2 |
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#2
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Some photos
First of all,
It was an easy job after all. The parts where easy to find The regulator cost about 26 Dollars. Bosch number IB200 The bearings are a 6203 and B17-99D (17x52x17) The bearing where not needed after all as they where still fine One thing I did learn It is not a good idea to split the top casing from the bottom This rips out the wires from the Diode blocks But us easily fixed, I soldered them back again
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2002 BMW 325i Touring 2003 BMW V8 4.4 2002 Land Rover Discovery 2 2002 Land Rover Freelander 1 1980 Lotus Esprit. Sold. Less work for me 1961 Jaguar MK2 Sold. One less project 1962 Land Rover Series 2 Last edited by ZAX5; 03-04-2020 at 09:03 AM. |
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#3
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Steps to follow
So the first step is to remove the pulley
Then take the four bolts out and the one nut on the positive terminal This allows the black cover to be popped off, the silicone was old and so it popped off quiet easily Remove the old regulator by taking out the four Torx holding it down Replace with new regulator Fasten the four Torx Put the cover back with new silicone Tighten the four bolts and add pulley, All done So I cant see why a recon unit can cost so much If the do the bearings, then the casing needs to be split, And the it is easy to get to the bearings, But if you do this, then loosen the wires from the field before you split the casing, and solder them back once done
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2002 BMW 325i Touring 2003 BMW V8 4.4 2002 Land Rover Discovery 2 2002 Land Rover Freelander 1 1980 Lotus Esprit. Sold. Less work for me 1961 Jaguar MK2 Sold. One less project 1962 Land Rover Series 2 Last edited by ZAX5; 03-04-2020 at 09:04 AM. |
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#4
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Interesting desing
The alternator seems to have an induced field to activate the rotor
With this the unit does not need brushes, and so one less wear part Brilliant design If you do split the casing you need to add heat transfer paste between the front casing and the back, this allows the heat from the regulator to be transferred to the back where the water is This step is not needed if the bearings are fine The front bearing is a double race unit and will take a while to fail
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2002 BMW 325i Touring 2003 BMW V8 4.4 2002 Land Rover Discovery 2 2002 Land Rover Freelander 1 1980 Lotus Esprit. Sold. Less work for me 1961 Jaguar MK2 Sold. One less project 1962 Land Rover Series 2 |
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#5
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So now it is fixed
The total cost in parts was the regulator at about 26 dollars from a Bosch dealer
Item IB200 The time whit splitting the casing probably an hour, but if only the regulator is changed then only about half an hour The battery voltage is now about 14 VDC when revved and 13.6 on idle And a lot easier than I thought I searched the web to see how it is done and found nothing So I hope this helps
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2002 BMW 325i Touring 2003 BMW V8 4.4 2002 Land Rover Discovery 2 2002 Land Rover Freelander 1 1980 Lotus Esprit. Sold. Less work for me 1961 Jaguar MK2 Sold. One less project 1962 Land Rover Series 2 |
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