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  #1  
Old 06-08-2011, 01:46 AM
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1980 450 sel no start

Quote:
up until a couple of weeks ago was running great and started right up. Now it will not start and I believe its a fuel delivery problem as it will start briefly if ether is sprayed into the intake, so it does have spark. The entire fuel system has been renewed as it sat for about 3 years with a 1/4 tank of gas in it. The tank has been relined with epoxy, the injectors and fuel system were professionally flushed and it has a brand new sending unit, pump and filter.
Quoted from the ad....any suggestions?

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Old 06-08-2011, 01:54 AM
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Also....I have thoughts about swapping an OM617 diesel from a 79 into this car.
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  #3  
Old 06-08-2011, 07:08 AM
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I was wondering if you were nuts, until I saw the second post...

Bringing a slumbering K-jet back from the dead is not easy or cheap, and then when you do it you are rewarded with , 12 mpg- why? The fuel is still not flowing as it should in that car, hard to say why. Fuel distributor? Still stuff floating around jamming up new parts?
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Old 06-08-2011, 09:58 AM
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Ok let's chat swap. How difficult would this be?
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Old 06-08-2011, 01:08 PM
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I don't think it would be too hard. I recall you have done some transmission heavy lifting before.

Driveshaft length/size/fittings the same? SEL vs 300SD

Air conditioning an issue where you are?

What about the rear end ratios?

I know it has been done before....probably lots of times
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
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Old 06-08-2011, 01:19 PM
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Quote:
Originally Posted by rs899 View Post
I don't think it would be too hard. I recall you have done some transmission heavy lifting before.
I have swapped one out before, and swapped similar engines before, but never a gasser to diesel conversion. However, it's going into the same vehicle, plus about....4.5" in length?

Quote:
Driveshaft length/size/fittings the same? SEL vs 300SD
I'm trying to find that out from a forum member here.


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Air conditioning an issue where you are?
I live in Canada.

Actually, the summers do get quite warm, but if the windows work (they don't on my current 300sd) and the sunroof - no worries at all.

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What about the rear end ratios?
I assume they are the same, but it shouldn't be hard to swap those over too if need be.

I know it has been done before....probably lots of times[/QUOTE]
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Old 06-08-2011, 01:26 PM
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I'm also wondering what the tranny on a 450 is like....be very cool if the bellhousing matched up, and if it was more robust of an auto.
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Old 06-08-2011, 01:48 PM
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Well, the tranny on the 450 is a 722.1xx, but 3 speed. If you need to use it, I guess you could swap bellhousings with the one from a 300SD.

I think the guts of the tranny may be rated for more power, but still that crappy torque converter...
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Old 06-08-2011, 02:20 PM
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I have lots of suggestions, but the last one would be to stick another engine in there.
You can start with the basics, Check if the fuel pump is getting power, disconnect the line to the fuel distributor and see if it's getting fuel etc.
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  #10  
Old 06-08-2011, 03:15 PM
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^^ sure, probably all the same stuff the PO tried and failed. Dunl's a dieselhead, he's just itching for an excuse. You, OTOH......

Right now on Diesel Discussion there's a guy converting a W126 , some good blather on there. Good suggestion on the vacuum shutoff.....
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  #11  
Old 06-08-2011, 07:22 PM
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Well, took a quick look today. Like all w116's....rust on the rockers. Too bad about them up here....it's a real shame. Back bumper is cracked and needs replaced. It died about three weeks ago....so there shouldn't be varnish in it yet. It almost sounds like it is going to start, but then stops. Spray ether in it and it keeps going. Definitely a fuel delivery problem of some kind.

Just not sure if it's worth the effort to make a 300SDL.
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  #12  
Old 06-08-2011, 07:27 PM
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Probably the best thing to do is find a nice southern 300SD. Those extra couple of inches don't make much of a difference to justify the effort.
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  #13  
Old 06-08-2011, 09:15 PM
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I agree- I was under the assumption that this was that rare rust-free car in Dunl's backyard. Much as I like the W116 , at the price of premium, with the expense of trying to figure out what's wrong with it, seems a bad investment. Have you looked at what it takes to change the timing chain on those? I am putting up with it in our R107, but there are better options in hulking sedans.
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  #14  
Old 06-09-2011, 01:58 PM
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My experience with K-Jets is purely theoretical, but there have been many reports of failed OVP (overvoltage protection) Relays, and Fuel pump relays. There are also many reports of blocked input/output filter screens on the fuel distributor. And more than a few mentions of vacuum problems.

But if you're a diesel head, you know about the vacuum thing (Is it true that part of the tool kit for diesel is a fistful of golf tees?)
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  #15  
Old 06-09-2011, 11:18 PM
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Quote:
Originally Posted by RadioTek View Post
(Is it true that part of the tool kit for diesel is a fistful of golf tees?)

And BB's.

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