Author Topic: Injection pump oil capacity ??  (Read 225 times)

rogerh113

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Injection pump oil capacity ??
« on: April 02, 2025, 17:13:43 »
Hello,

Looking to top up the oil level in the injection pump.  I have no idea what the capacity is, so don't know how much oil to start with - don't want to overfill.  At least if I know the capacity, I can put a little english on the amount I put in....

thanks -- Roger

engine is a 250
1966 230SL black 4 speed (250 low compression engine)

dirkbalter

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Re: Injection pump oil capacity ??
« Reply #1 on: April 02, 2025, 18:22:45 »
The pump should have a dip stick to verify the correct amount. Somewhere here is the procedure to check for the correct amount.
Dirk
66 230 SL
70 280 SEL
53 CHEVY 3100
18 C300 COUPE
05 HD FLSTNI

rogerh113

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Re: Injection pump oil capacity ??
« Reply #2 on: April 02, 2025, 19:20:21 »
Thanks.  I looked at the dip stick to note that I was a bit low.  It is pretty hard to effectively read the dip stick, since getting it in and out is awkward at best, and that could certainly affect the reading.

I put in about 3 caps of oil into the fill area, and it seems like the level is good (or as good as one is able to determine).

I would certainly recommend that the injection pump level be checked periodically, as a failed injection pump is likely a pretty dear repair.
1966 230SL black 4 speed (250 low compression engine)

dirkbalter

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Re: Injection pump oil capacity ??
« Reply #3 on: April 02, 2025, 19:37:24 »
Also,
I was told to measure the oil level with the dip stick only resting on the opening. (not screwed in). I have seen a post here that says to screw it all the way in to check the level on early 230's.
Dirk
66 230 SL
70 280 SEL
53 CHEVY 3100
18 C300 COUPE
05 HD FLSTNI

BobH

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Re: Injection pump oil capacity ??
« Reply #4 on: April 02, 2025, 19:43:16 »
Have a look towards the bottom of the page for checking the oil level

https://www.sl113.org/wiki/Fuel/Injection

Actually, seems you need to be a full member to access this page, the tips and pictures were taken from a post on here so you may find it if you search
February 1965 230SL Automatic
UK delivered RHD
Papyrus white, blue hard top & hub caps
Blue soft top
Blue leather

dirkbalter

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Re: Injection pump oil capacity ??
« Reply #5 on: April 02, 2025, 20:15:11 »
Have a look towards the bottom of the page for checking the oil level

Yup, there are also two different opinions on whether or not to screw it in. If I remember correctly, it is also described in the BBB. I will have a look later.
Dirk
66 230 SL
70 280 SEL
53 CHEVY 3100
18 C300 COUPE
05 HD FLSTNI