The alternator seized up on my 82' 300d. I have an 84 300d for a parts car with a good alternator ( I hope ). My problem is that I can't get the adjustment bolt to budge on the 82'. I have the bottom bolt nearly off ( not sure that it needs to come all the way out ), and the nut on the adjustment bolt is off but the bolt wont budge. Any suggestions on what to do about this? I can't even get the alt. to move so I can get the belts out of my way. Any help is appreciated.

I should add that I have the adjusting rod/nut bent out of the bracket but the big bolt with the bushing won't move.

Thanks

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

Anyone out there? The bolt is still seized and I am getting ready to take a jack hammer to it. Really, I am about to start taking the car apart so I can get a torch and a hammer on the bolt. I would prefer not to but don't know what else to do. Any suggestions are helpful. Thanks

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

Try posting this in the Diesel Discussion.

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- 1979 W123 240D 4-speed, 390k miles

Id be soaking it in a penetrating fluid of some kind. Take a closer look at your donor and see if there are any openings you can get a bigger tool in there.

My adjuster is simply what looks like a bolt coupler and it works great. I cant think of a reason of why its locked up unless someone used a thread sealer on it.

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

I had to bend the adjuster part and the bracket part.Then work bolt up and down with adjuster part of bolt.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

I have the adjuster free but the big bolt ( connected to adjuster ) that goes through the alternator won't budge. The adjuster just bends with out the bolt moving.

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

please explain what you are trying to do.

are you wanting it tighter? do you want to loosen everything to get the belts off?

I always loosen the three bolts from the back of the alternator first. then the alt, and bracket are able to move easily.

if the wrong belt in on there, tightening will be difficult.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

To remove the alternator on my car there is just a bottom bolt that goes through the alt and the top bolt with the adjuster on it. The alternator seized so I was replacing it with one from a parts car. I ended up cutting the adjuster part of the bolt off so I could get a wrench on it. Then with lots of torch and hammer work it finally came out. That was the most difficult alternator project ever. I can replace the alt. on my truck in 10 minutes.

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

if you are not loosening the third bolt that attaches the upper bracket to the block, you will have great difficulty loosening the alternator...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

The third bolt holding the bracket to the block is stripped. The main problem was the adj. bolt was rust/welded into the bracket.

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

Not to the point of this thread but this thread might attract someone who needs the below information.

Using an Eye Bolt to repair a broken alternator tensioner bolt eyebolt on Alternator
Stuck on V-Belts: ALternator bolts frozen and tension bolt broken - Page 2 - PeachParts Mercedes ShopForum

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84 300D, 82 Volvo 244Gl Diesel

Thanks, that's a good idea. Fortunately the alternator tensioner bolt on my parts car came off just fine.

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96 F350 CC, LB, 4x4. 290,000 with around 90,000 on wvo.

82 Mercedes 300d. New to me. 211,000 soon to be on wvo.

Cut the nut off the adjusting bolt.

.

Neverseeze type compound also seem to work well at decreasing the chance of Bolts getting rusted in place.

Sounds like in your case the whole shaft of the larger portion of the adjusting Bolt could benefit from a coating as well as the threads.

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84 300D, 82 Volvo 244Gl Diesel