|
|
|
#1
|
|||
|
|||
Vacuum reads 11 at the brake booster on...
a new Mityvac.
BTW, the carrier bearing, housing and flex disk job works well. The shifter is vibrating just enough to let you know the engine is running. Almost no vibration at all. I've started on the vacuum system and by removing the main line from the brake booster and plugging the two tees on the main line. Shall I buy a new pump?
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#2
|
||||
|
||||
I think it is supposed to read about 20. That's what my 81 300SD reads.
|
#3
|
|||
|
|||
seems low.
you may want to inspect the check valve at the top of the pump. easy access. I think its 18mm or 19. I just bought a new one at PP for $75, but I'm sure you can find used for cheap. If that's your problem, PM me and i'll send you a spare. another alternative is to rebuild your pump. there are two kits. unfortunately one of the kits is NLA, and the other is expensive. I found both on ebay, reasonably priced. and the rebuild was significantly less than buying a new pump. you may also want to find a nice used pump.
__________________
1983 300CD Turbodiesel |
#4
|
|||
|
|||
Try breaking the fitting upstream and measure as close to the pump as you can. No sense fooling w/ the pump if the low reading is from a tubing leak. If you see the needle on the gage pulsing with the engine (1/2 rpm), the outlet check valve on the pump is probably bad or gunked (easy to clean) and they don't come w/ a new pump. The "check-valves & seals" rebuild kit for your 1-tube pump cost ~$110. A new pump cost ~$350. If you do rebuild, change the roller's bearings if they might be bad (posts here w/ PN's).
__________________
1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#5
|
|||
|
|||
Check valve.
Quote:
Perhaps someone took it off and I'm reading the diagram wrong or I am selecting the wrong diagram? PP shows no check valve for this year and model. I'm concerned about this and I'm open for suggestions.
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#6
|
|||
|
|||
is this your pump?
Vacuum Pump 0002301365 - Genuine Mercedes-Benz - Genuine Mercedes-Benz - 000-230-13-65-M22 | Pelican Parts
__________________
1983 300CD Turbodiesel |
#7
|
||||
|
||||
I would have left the line connected and measured at the "T"s, one at a time with the other blocked off.
This helps my make sure there isn't any leaks at the connection point. Should be around 22 inHg. Here's a video I did a few years ago: https://www.youtube.com/watch?v=bMAl9GXU1KY That's the SD, the orifices are between the fake fire wall and the real fire wall.
__________________
83 SD 84 CD |
#8
|
|||
|
|||
Quote:
I actually took the main line off the brake booster and plugged that end, removed the two Tees between that and the pump and hooked the gauge up there to check the vacuum source. I'm asking if this particular auto was build without a check valve in the main vacuum line.
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#9
|
|||
|
|||
Quote:
Honestly, it's had vacuum problems since I got it several years ago. I changed the vacuum pods when I changed the interior four years ago. I'm guessing all the years of hard shifting is what ripped the center/carrier bearing housing apart. Will it be possible to locate the part number on that pump while it's on the engine?
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#10
|
|||
|
|||
Sorry, Bill
Quote:
It's raining here in Greenville, SC this morning and I'm without cover so I'll remove and examine that valve when it clears a little. Thank you, sir.
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#11
|
|||
|
|||
Take a picture when you get a chance
But it seems that you "should" have the single port pierburg pump with check valve
__________________
1983 300CD Turbodiesel |
#12
|
|||
|
|||
Quote:
Is this valve no more than a housing with a metal ball within which allows air to flow one direction? If it is wouldn't a gallon vat of carb cleaner be sufficient to clean it out? It's over the counter stuff which does no harm to aluminum so I'm guessing it wouldn't hurt brass or other soft metals.
__________________
84 300SD 85 380SE 83 528e 95 318ic |
#13
|
||||
|
||||
Some of those are one piece units, below is one that can be opened up.
__________________
83 SD 84 CD |
#14
|
|||
|
|||
I thought you had a vacuum problem, no?
It looks like you put up a pic of the IP Maybe I'm missing something
__________________
1983 300CD Turbodiesel |
#15
|
|||
|
|||
Which fitting are you checking from, between the firewalls?
There are two branches off of the main line with one having a metered orifice. If you inspect it closely, it will have a "dot".
__________________
Sam 84 300SD 350K+ miles ( Blue Belle ) |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|