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#1
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300E center vent problem
So, all my vacuum pods are original in the 87 300E, and they all still work (fingers crossed) with the exception of the center vent actuator. When I turn the A/C on, the actuator does not open the flap for center vents like its supposed to. However, if I stick a rod through the vent grille, and gently push on the flap, it will slowly start lowering itself down and stay down until I shut the car off. I have to do this every time I turn the a/c on otherwise it just won't open by itself.
Any idea why the pod won't pull the flap down by itself? Is it finally shot or could there be some other kind of vacuum leak that's not giving the pod enough power for the initial push? Thanks much in advance! -Chris
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Streetside: 1987 Mercedes 300E Petrol Blue/Green 2014 Ford Mustang Grabber Blue 1999 Ford Ranger Green Dockside: 1968 Eltro 17 1985 Silverton 34C |
#2
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You need to make sure that there isn't any other vacuum "pods" that leak.
When you ask for center vent operation, there are 3 other diaphragms that get vacuum to CLOSE at the same time. You need a vacuum schematic & a vacuum hand pump with gauge.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Pull the glovebox, then use a Mityvac on each vacuum line. Whichever ones do not hold vacuum = done!
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k |
#4
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Thanks.
I'm sure I'll fine a few that are leaking.
__________________
Streetside: 1987 Mercedes 300E Petrol Blue/Green 2014 Ford Mustang Grabber Blue 1999 Ford Ranger Green Dockside: 1968 Eltro 17 1985 Silverton 34C |
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