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#1
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Is dieselgiant wrong?
I've recently bought a very stock, very nice '84 300D. I'm interested- in what seems like a consensus- with the elimination of the two lines that feed vacuum to the black, two-lever switch box located on top of the valve cover.
Now, there seems to be conflicting info here- I read here that this device has nothing to do with the proper operation (shift points, smoothness) of the AT, being only part of the lame US EGR system. However, reading DieselGiant' s instructions, I'm told that this valve/ lever device has everything to do with the AT's operation... Am I missing something? Thanks for your advice Will |
#2
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Yes they do.But I got rid of them,and run line to 3 way conector,one end plugs on the vac modulator on injection pump,the other the vac line from transmission goes in.Egr is the worse thing for diesels.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
#3
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I have removed or completely bypassed the egr system on every MB diesel I've owned. DG may run into legal issues were they/him to mention otherwise.
In the pic you may be able to see my switchover valve is bypassed also.
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83 SD 84 CD |
#4
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I certainly like the cleaned-up appearance you have there.
Do you have an official MB part number for the white- colored plug next to the firewall? (Kidding) thanks for your help |
#5
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That is a seemingly common misconception. The purpose of the valves is to operate the EGR valves. However, if the valves leak, the operation of the transmission can be affected. So, folks replace the valves, then the transmission shifts better. So they conclude that the valves operate the transmission. (This applies to the subject vehicle; other models are different.)
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#6
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I thought it also had something to do with softening the shift while cold but that is really just speculation.
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For Sale: 1982 MB 300TD 1995 Chevrolet Suburban 6.5TD Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel |
#7
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Quote:
Is that the electrical switch that is usually mounted on top of the camshaft cover? What its purpose?
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Current Rides: 2004 BMW R1150GS Adventure 2005 MB W211 E320 Cdi |
#8
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DG means that if the valves are leaking they can have a big impact on transmission performance. Working normal or removed, they have no impact on the transmission.
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#9
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Quote:
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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST 1983 300SD - 305000 1984 Toyota Landcruiser - 190000 1994 GMC Jimmy - 203000 https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif |
#10
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Quote:
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#11
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Quote:
dd
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------------------------------- '85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit) '82 300D, 'Tex', 228k body / 170k engine ... summer car '83 300TD Cali Wagon 210k, wife's car |
#12
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I have run without the valve for years with no issues with my trannys.
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1984 Euro 300SDC, (4spd standard) 1986 Toyota Landcruiser Diesel HJ60 5spd X2 Gone but not forgotten (some sold, some stripped) 1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D |
#13
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The 240D is the only one that the valve on the valvecover affects the transmission.
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#14
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Quote:
The switchover valve is located on the first firewall, the pic shows a new hard line from the manifold to the switch over valve, I have just bypassed it on this car yesterday, and am going to take it for a drive to see if there is any difference. The one on my CD has always been bypassed.
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83 SD 84 CD |
#15
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Quote:
Quote:
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
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