Vacuum Pump Implosion? W115 240D
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I was driving home in the W115 240D on the freeway and noticed some louder than usual engine noises. All of the sudden when traffic built up I pressed down on the brakes and no vaccum boost was available! I was going through south central and the engine was still running and there was oil pressure so I pushed on.
When I got home I found that the whole front end of the vacuum pump had cracked from top to bottom. Has anyone seen something like this? I guess it's metal fatigue from 32 years of operation :rolleyes: http://www.curtisgee.com/digital/P0004910_600.jpg |
Well, when you figure 1 pulse per engine rotation...
3000rpm highway cruise for 1 hour. That's 180,000 pumps! I can't even imagine how many times it pumps over 200,000+ miles! :D Amazing that they don't break sooner. |
Oh I have never seen a pump do that. I bet the rocker arm assembly failed.
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Take a look at the photos of mine in post #24:
http://www.peachparts.com/shopforum/diesel-discussion/151324-stuck-ne-vacuum-pump-failed-2.html Most likely the pump failed and broke the casing. You don't want to drive it until you replace the pump and take a look in the oil pan for loose parts. Hopefully, you will be luckier than I was. |
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It would seem that the pump failed and hammered away at the case. I am interested to know what happened. When I get the pump back I will post some follow up pictures. I hope the pump from the 1979 240D will fit on it! Wow am I happy that I upgraded my AAA membership to Plus status 3 weeks ago! The memership fees paid for itself in one tow. :rolleyes: |
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Worst case scenario, if it's bad, it's time to yank the 300D motor and drop it in! |
yeah, sounds like it is restricting your intake on the oil pump.
not good. tom w |
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