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  #1  
Old 11-18-2011, 11:08 AM
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82 240D starter or ignition switch issue. Wont crank.

Guys,

New MB diesel owner and new to the boards. Didnt think my first post would be about a problem..Hahaha Have had my 240D, 181K miles, mint, one owner car, for a month now, ran flawless up until this morning. I started to notice hard starting in the cold morning a few days ago, Figured the glow plugs or relay needed to be changed since this car sat for 6 months(but warmed up every week) till i got it. So this morning, it wouldnt start. Kept cranking it, nothing. Since i was free today, decided to take the plugs out and inspect, all but one had oil/diesel gunk on them.

My understanding is if your GP isnt getting hot, then the gunk doesnt burn, hence the stuff on the plugs. Tested the plugs with jumper cables and the ones that were covered in oil were not lighting at the tips. Had extra plugs, tested them, worked, popped them in the car..Now, starter wont turn because i drained the battery from cranking it excessively..so i thought.

Hooked up car to another via jumper cables, let it charge for 10 mins or so..Lights all strong, accesories, etc. Turn the key, key wouldnt turn for a second, seemed jammed, turned it to 0 position, couldnt pull it out, jiggled the wheel a lil. Key turns, glow plug light works as it supposed to, but now the starter wont crank, and all i get is a click..

I ran out of daylight so i didnt get to try jumping the starter or tapping the solenoid..

What do u guys think? something with the starter or something with my ignition switch? Its just coincidental that the key jammed, wouldnt turn, and now the starter wont crank.

BTW, I love this car. having owned various Hondas, e36, e46 BMW's, I find that its such a handsome and nice driving car abeit slow, and I appreciate this 80's MB technology..They DID build these better back then.

TIA

-Ray
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Old 11-18-2011, 11:59 AM
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Hi Ray,
I've got no idea, but it sounds like maybe you're battery's too flat to turn the motor... you've put better GPs in, but yr battery's gone dead.
Charge it, sleep on it, start it, drive it...
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Old 11-18-2011, 12:35 PM
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Fuel filters? Could be algae in the tank if it sat that long?
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Old 11-18-2011, 01:05 PM
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When you jump start a car it is better to have the engine of the other car (supplying the juice) running at about 2000 rpm or a bit more so that the charging system on the other car is giving enough juice to your stricken beast.

Alternatively disconnect the battery in stricken beast and connect up a healthier battery.
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Old 11-18-2011, 02:57 PM
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Engine not starting or Starter not Cranking?

Mercedes or not the Starter Battery stuff is mostly the same as other Cars.

If you have an Automatic Transmission there is a Neutral Safety Switch that can go bad your Starter will not crank.
You can try starting in neutral to see if it works there.
Worn Shifter Bushing can cause a similar problem.

If the Starter is not cranking try a jumper wire from a Posative source to the small terminal on the Starter Solenoid. If it cranks like that you have some issue between the Starter, Neutral Safety Switch and the Ignition Switch.

Bosch or Beru Glow PLugs are the only ones that hold up well. I tried Autolite Glow Plugs and barely got 2 of them out of the Cylinder Head due to the tips becomming swollen.

When the Glow Plugs were out the holes should have been reamed out with a Glow Plug Reamer made for the job or some alternative method.
I believe if there is enough Carbon around the Glow Plugs the heat goes into the Cylinder Head and the Coolant instead of heating up the Air in the Precombustion Chamber.

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Old 11-18-2011, 04:56 PM
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I'd suspect poor connections at the battery or a bad battery.
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Old 11-18-2011, 06:47 PM
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Hey guys, thanks for the replies. So this is what happened today

battery is good, actually its about a month old.. had it checked just to be sure and its got the right amperage.

jumped the two prongs on the solenoid, no good. It tries to spin slowly but not enough to turn the engine over.

read up on the possible neutral safety switch but its definately not that, since the starter will try to spin when i turn the key..

it looks like a bad starter. By looking at the bolts and the starter itself, it looks like its still the original unit...

Before I changed out the glow plugs yesterday, I kept cranking it over and over again when it wouldnt fire..Would doing that ruin a possibly 29 year old starter?
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Old 11-19-2011, 12:33 AM
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Quote:
Originally Posted by KleanW123 View Post
Hey guys, thanks for the replies. So this is what happened today

battery is good, actually its about a month old.. had it checked just to be sure and its got the right amperage.

jumped the two prongs on the solenoid, no good. It tries to spin slowly but not enough to turn the engine over.

read up on the possible neutral safety switch but its definately not that, since the starter will try to spin when i turn the key..

it looks like a bad starter. By looking at the bolts and the starter itself, it looks like its still the original unit...

Before I changed out the glow plugs yesterday, I kept cranking it over and over again when it wouldnt fire..Would doing that ruin a possibly 29 year old starter?
Yes it is possible you could even cook a new starter doing that.

A quick test if you have a voltmeter or test light. One lead on the battery post. The other lead on the battery post clamp. Do both terminals while having someone turning the ignition switch to the start position for a second or two each time.

There should be almost no voltage. Or the test light should not glow. The reason for this test is you had the battery in and out etc. There may be a poor terminal to battery clamp situation existing. Not too possible but I would eliminate it before changing the starter out.

For the time it takes loosen and inspect the connection to the starter of the large wire. The heavy continuious current of excessive cranking may have had some effect of the connection. Plus it is wise to make sure the grounds are good still. Running a booster cable from the negative terminal to the block easily tests for that..
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Old 11-19-2011, 07:32 AM
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X 2 what Barry said. If happens to be a starter, IMO only replace it with a Bosch new/rebuilt unit. I was in a crunch, and needed the car, so I got one from the local AZ. Gave up on AZ after two bad units. Knock on wood, the Bosch is still going strong.
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