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2001 SLK320
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1,770 Posts
Discussion Starter · #1 ·
I'm trying to remove the alternator but I haven't got very far. I have both bolts undone, and the electrical connector disconnected. I can't reach the main connector, but I maybe I can get to it when I get the alternator moving.
Does the alternator comes out from below? If so, there are two pipes in the way These are rigid pipes and even with short lengths of rubber pipes in the line, they don't move. See attached; the pipes with orange and yellow marks.

I can't get it out through the top/front without taking the water pump off (which provides the mounting bracket for the alternator). Not a huge job, but best to ask for advice before I do that.

Search shows nothing in our DIY section, and I can't find anything on Youtube. Benzworld has one post that simply says "remove a bracket, and lower the alternator downwards and out". Lack of information suggests it should be obvious, but it's not to me.

Can anyone provide some guidance please.
 

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*Premium Member
2001 SLK320
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1,770 Posts
Discussion Starter · #10 ·
No problem getting the bolts out. I will have to decide whether to take out the water pump or take it to a repair shop. I'm not going to take the transmission cooler pipes out.
 

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*Premium Member
2001 SLK320
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1,770 Posts
Discussion Starter · #12 ·
It's out and rattling around. It's out of the brackets. It's supposed to come out of the car downwards but there's two pipes in the way (transmission fluid by the looks of things). Despite having short lengths of rubber hose, these pipes are largely rigid and don't move even when I remove some fixing clamps. There is a photo in post #1.
 

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2001 SLK320
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1,770 Posts
Discussion Starter · #15 ·
Thanks. I did think that's what a professional might do, but I don't have the facilities to get both ends of the car in the air at the same time. Raising the engine of a sloping car doesn't appeal. :) . I wish I'd had the job done when I got my engine mounts done a few years ago, but I didn't think of it.
 

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2001 SLK320
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1,770 Posts
Discussion Starter · #18 ·

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*Premium Member
2001 SLK320
Joined
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1,770 Posts
Discussion Starter · #22 ·
Oh, that's a good write-up. I should've thought to look on the crossfire forum. Mind you, I found it impossible to rotate the alternator more than about 5 degrees, never mind 45 degrees. The bottom mount is held between two jaws of the engine casting (as alternators are) and it's held really tight. I managed to push the bush of the upper mount back, so that one was very loose, but I couldn't get enough room to do the lower mount, and even if I had, that would only have retreated half a mm or so.

So I took the water pump out today. LOADS o' room now! New alternator will be here early to mid next week, as well as a new water pump gasket. I wish I'd done that first. I've done the water pump before, so no learning curve, easy job. No stress and frustration.
 

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*Premium Member
2001 SLK320
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1,770 Posts
Discussion Starter · #27 · (Edited)
Yes, I think the consensus here is Auto Transmission is a real beast and Manual G/Box is a bit of a beast 🤣
Well, actually, if I'd known what I know now (for me, easier to remove the water pump), it would all be done by now. I'd just accept it and it wouldn't be hard. I spent almost a day trying to work out how to get the alternator out, based on instructions that didn't appear to relate to my car.

I accept this as a price I pay for being a novice. I'm not too bad a repairing things but I acknowledge I don't have the experience of a professional. And I know my limits. Removing a water pump (whether required or not) made it easy and saved me a few hundred dollars by not having to take it to a repair shop.

Mind you, the new alternator isn't back in place yet. :unsure:
 

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2001 SLK320
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1,770 Posts
Discussion Starter · #29 ·
Could that be anything to do with putting the wrong bolts in the wrong hole? There are an awful lot of bolts on this water pump, and many (many, many) different diameters and lengths. If you put too long a bolt in the wrong hole...............?
 
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