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Old 11-05-2007, 09:10 PM
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Captain Scott Captain Scott is offline
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Join Date: Apr 2005
Location: Coos Bay Oregon
Posts: 90
Yep, Tom, that was a bad word-error, no!? As a closet mechanic, I'll probably recover...

On this 74, the fuel pump has been humming noticably on and off for the past 2 years, but I only put a few hundred miles per year. Although I believe the pump is doing it's job, should I just change out the pump or start with the check valve and wait for the pump to worsen? Do new pumps include a built in check valve system or is it extra?

Cost-wise, the check valve is much easier to swallow if the pump will last.

What do you think?


Quote:
Originally Posted by Tomguy View Post
Either your year is incorrect or your assessment of your fuel system is. MB used D-Jet through 75 and 76 was the changeover year.

Either way, your fuel pump's check valve sounds at fault.
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1974 450 SL (214K)
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