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Car Forum / Mercedes-Benz Cars / September 2007

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Will a 300E start without the belt

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jb - 14 Sep 2007 02:42 GMT
My car all of a sudden wouldn't start for me. So, I looked under the
hood to find that the belt was dead loose. The spring in the belt
tensioner has broken. Is there anything that would prevent my 1988 300E
from starting due to lack of tension on the belt or am I in for more
fun? Thanks for your thoughts.

JB
99 E55
88 300E
trader4@optonline.net - 14 Sep 2007 04:19 GMT
>   My car all of a sudden wouldn't start for me. So, I looked under the
> hood to find that the belt was dead loose. The spring in the belt
[quoted text clipped - 5 lines]
> 99 E55
> 88 300E

What exactly do you mean by it wouldn't start?   Does it turn over?
If the alternator belt has come off and the car is run enough for the
battery to discharge, then that would certainly prevent any car from
starting.
jb - 14 Sep 2007 17:06 GMT
>>  My car all of a sudden wouldn't start for me. So, I looked under the
>>hood to find that the belt was dead loose. The spring in the belt
[quoted text clipped - 10 lines]
> battery to discharge, then that would certainly prevent any car from
> starting.

No it cranks fine. The battery is strong
Tiger - 15 Sep 2007 14:58 GMT
Technically, the car should be able to run without the belt... that is why
MB put such a large battery in the car... so you can continue to drive after
belt or the alternator is shot... for up to 2 hours.
jb - 15 Sep 2007 16:49 GMT
> Technically, the car should be able to run without the belt... that is why
> MB put such a large battery in the car... so you can continue to drive after
> belt or the alternator is shot... for up to 2 hours.

Thanks Tiger
Jens - 16 Sep 2007 15:14 GMT
> Technically, the car should be able to run without the belt... that is why
> MB put such a large battery in the car... so you can continue to drive after
> belt or the alternator is shot... for up to 2 hours.

Yes, it will (or should be able to) run. But water pump will not be
driven, and engine will consequently soon run hot.

So, the starting problem is to be found somewhere else.
Tiger - 17 Sep 2007 15:44 GMT
Doh! I didn't think about that... maybe that's why there is a kill switch to
prevent the engine from running... I guess only the alternator is allowed to
die... but belt requires total shutdown.
Jens - 21 Sep 2007 06:39 GMT
> Doh! I didn't think about that... maybe that's why there is a kill switch to
> prevent the engine from running... I guess only the alternator is allowed to
> die... but belt requires total shutdown.

Just curious, what kill switch?
Tiger - 21 Sep 2007 15:37 GMT
I am not sure... I would assume they compare the signal of the crank
position sensor with the alternator and air conditioner compressor...
DougS - 27 Sep 2007 20:47 GMT
> > Doh! I didn't think about that... maybe that's why there is a kill switch to
> > prevent the engine from running... I guess only the alternator is allowed to
> > die... but belt requires total shutdown.
>
> Just curious, what kill switch?

Don't know about the gas burners, but my diesel has a big STOP sticker
to show where the kill switch is on the engine, its basically just a
fuel cut-off for the diesel engines. Most others have some kind of
switch or lever on the engine (under the hood that is) that will let
you kill it from the engine compartment.
mcbrue - 28 Sep 2007 00:08 GMT
Well I personaly alllllways wear a belt when driving an MB. That way
if it lips off, I can just take my belt off and beat the kar with it
until it behaves. Good luck!

mcbrue beltedly under the bridge in the trailer down by the river

06 LS430 Kudzu burner
Guenter Scholz - 16 Sep 2007 15:33 GMT
>Technically, the car should be able to run without the belt... that is why
>MB put such a large battery in the car... so you can continue to drive after
>belt or the alternator is shot... for up to 2 hours.

    of course it goes without saying that you'll be watching your
temperature gauge depending on the time of year.....

cheers, guenter

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