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  #1  
Old 09-27-2019, 08:53 AM
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Join Date: Jun 2005
Location: Anniston, AL
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1987 420 SEL - Main areas of concern

Greetings. I am considering the purchase of the title car with only 60K miles. What are the main weak points / issues that crop up with this model? I owned two other W126's, but they were both diesels...
Thanks in advance!

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Mine: 1987 MB 420 SEL - 62K (Dec 2019)
Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016
Mine:1981 MB 300SD - 326K mi (July 1997)-sold
Wife's: 2008 MB C300 Sport - 92K mi (April 2009)
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  #2  
Old 09-27-2019, 11:39 AM
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If it isn't rusted it will be a nice car. Replace the timing chain guides, plastic pieces on the camshaft oiler tubes and VC gaskets.
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  #3  
Old 09-30-2019, 07:35 AM
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Quote:
Originally Posted by Sugar Bear View Post
If it isn't rusted it will be a nice car. Replace the timing chain guides, plastic pieces on the camshaft oiler tubes and VC gaskets.
Thanks!

I also spoke with my local MB indy. Said that rust inside the gas tank and fuel distribution system/injectors should be evaluated.
__________________
Mine: 1987 MB 420 SEL - 62K (Dec 2019)
Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016
Mine:1981 MB 300SD - 326K mi (July 1997)-sold
Wife's: 2008 MB C300 Sport - 92K mi (April 2009)
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  #4  
Old 09-30-2019, 01:43 PM
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Quote:
Originally Posted by dcotejr View Post
Thanks!

I also spoke with my local MB indy. Said that rust inside the gas tank and fuel distribution system/injectors should be evaluated.

yes the gas tank should be checked. I'm on my 2nd new fuel filter because the first one got plugged up after just 12k miles.


Fuel distributor on your car is aluminum so they don't get rusty like the old cast iron ones and how's he going to check it? the only way is to rebuild. I would leave it alone
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  #5  
Old 10-01-2019, 07:59 AM
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Join Date: Jun 2005
Location: Anniston, AL
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Christuna, I wasn't thinking about dismantling the fuel distribution, but just taking the car for an agressive test drive to make sure there are no skips, etc, and that there is smooth acceleration
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  #6  
Old 10-01-2019, 01:55 PM
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way to check your distributor and injectors without taking it apart:


https://www.youtube.com/watch?v=bEof3MltBgM


I actually did that on my 300SE and all cylinders were within 5% and the spray pattern was good

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