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Post by phaeton on Mar 4, 2018 10:35:46 GMT
Fetched the wife last night around 23:00 no issues, got in this morning & ignition warning light not going out. So figure 3 things alternator screwed, wire broken or fuse blown, is there a fuse in the circuit?
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Post by davrav on Mar 4, 2018 11:03:28 GMT
Is the serpentine belt slipping?
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Post by phaeton on Mar 4, 2018 12:42:54 GMT
No it seems okay, but there is a faint whiff of brunt electronics so it could be the actual alternator, although that might just be me, it hasn't given any signs, just need to work out how to get to it now
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Post by phaeton on Mar 4, 2018 17:00:30 GMT
So taken the plunge & taken the alternator off, it had 12V at the big terminal
For reference to other people the way I did it was
1. Disconnect Battery
2. From over top of engine, remove 10mm cable stay, then 10mm main battery terminal from alternator & the 4 pin control terminal
3. Jack up offside & remove wheel
4. Remove lower wheel arch trim to see alternator
5. Remove 2x 12mm bolts, they are awkward & tight, make sure you get socket square on
6. From above again remove 12mm bolt holding the top of the alternator, as this comes off it comes away from the serpentine belt
7. On the bulkhead is what looks like some form of ECU or something held on with 2x 10mm bolts removing this give access to lift the alternator free.
 img images |
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Post by davrav on Mar 4, 2018 19:33:16 GMT
So taken the plunge & taken the alternator off, it had 12V at the big terminal
For reference to other people the way I did it was
1. Disconnect Battery
2. From over top of engine, remove 10mm cable stay, then 10mm main battery terminal from alternator & the 4 pin control terminal
3. Jack up offside & remove wheel
4. Remove lower wheel arch trim to see alternator
5. Remove 2x 12mm bolts, they are awkward & tight, make sure you get socket square on
6. From above again remove 12mm bolt holding the top of the alternator, as this comes off it comes away from the serpentine belt
7. On the bulkhead is what looks like some form of ECU or something held on with 2x 10mm bolts removing this give access to lift the alternator free.
img imagesGood info. Thank you. Can we pin this Hoovie? |
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Post by phaeton on Mar 5, 2018 10:43:21 GMT
Went to the local Auto electricians at 8:30, he pulled off the back & said yep diode pack blown, £40 for new fitted or £80 with new bearings/brushes as well, so having both done. Just rung me to say he's done it, off to fetch it now
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Post by davrav on Mar 5, 2018 11:36:12 GMT
Nice one :TU:
Will you be replacing the belt on re-assembly?
I asked about belt replacement at last service [110K] with MrT and was told that they inspect the belts and only replace if wear/damage evident.
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Post by Hoovie on Mar 5, 2018 11:49:03 GMT
Went to the local Auto electricians at 8:30, he pulled off the back & said yep diode pack blown, £40 for new fitted or £80 with new bearings/brushes as well, so having both done. Just rung me to say he's done it, off to fetch it now
Nice job Could you take a couple of photos of the refitting as well? I'll put it all together as a How-To (or you can write it up yourself and I'll put in in the How-To section?) |
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Post by phaeton on Mar 5, 2018 14:03:50 GMT
Nice one :TU: Will you be replacing the belt on re-assembly? I asked about belt replacement at last service [110K] with MrT and was told that they inspect the belts and only replace if wear/damage evident.
I did think about it, but ringing round nobody had stock till later today so it looked okay & had the alternator gone I wouldn't have changed it so, I'm hoping I'm okay. I'll do the rebuild as I need to catch up on work I've missed outside, other than to say the belt was a real beeitch.
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Post by phaeton on Mar 5, 2018 17:39:19 GMT
So taking what I put above just a couple of clarifications, this is for a 2007 4.3 2.2L D4D Diesel, the alternator is bolted directly to the engine block & the belt is tensioned by a spring loaded pulley. The alternator is located down the back of the engine in the top left hand corner of the bay as you are facing it, below the brake & clutch fluid reservoir.
Here is the Alternator back from the refurbishment
It's a little awkward & it doesn't help that the alternator must weigh 7Kgs maybe even more, I know that's not particularly heavy but whilst knelt with 1 knee on the battery & the other on top of the engine it gets heavy very quickly.
To get a bit better access I removed the radiator expansion bottle 2x 10mm each end, you have to remove the first 3 plastic clips from the trim panel to get to 1 bolt, you can then just lift it away. If I had to do another one I would do this as I took the alternator out.
Then there is a clip in the way, again just a 10mm to move it, you get better access this way.
Before
After
Then it's a matter of pushing the 12mm top bolt through the hole in the alternator & then using your other hand try to find the hole & start the thread, you can't see what you are doing but once it starts (don't force it) I screwed it in so far, then went up from the bottom & put the 2x 12mm bolts in, got them reasonably tight, then came back up & finished the top one.
Replaced the cable support on top of the alternator, fitted the 4 pin plug & then the 10mm of the main battery cable.
Then came the hard part, or what I felt was the hardest part, getting the belt back on, I took the belt off the crank pulley but left it on all the others.
There is a 22mm bolt head on the tensioner, you have to turn it anti-clockwise, hold it there & then feed the belt onto the bottom pulley, a 2nd pair of hands would help here, I was concerned about putting too much tension on to make the belt slack enough but it seemed okay. I had to use 2 spanners to get enough leverage, I'm sure there will be a proper tool to do it.
This is the ECU thingy that I removed to be able to get the alternator out
This is looking down from the top of the engine with everything connected again.
Reconnect battery & fire her up, 12.49V before starting, in less than 1 minute up to nearly 14v
Looking at the time of the images the alternator was taken at 11:21 & I have one with 14V on the multimeter at 12:58 so about an hour & a half to put back
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Post by Hoovie on Mar 5, 2018 18:14:18 GMT
Job Done :TU:
You make it sound very simple (relatively speaking) ... How easy would you say for a typical 'interested' person?
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Post by phaeton on Mar 5, 2018 18:29:50 GMT
In vein of Haynes 5 spanners it's about a 3, 30 years ago I would have breezed it, I'm aching a bit currently
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Post by unclebob on Mar 5, 2018 18:33:43 GMT
Job well done 👏🏻👏🏻
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Post by jasehutch on Mar 5, 2018 19:05:00 GMT
Great write up.....  |
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