Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Paul99 on August 11, 2019, 12:36:29

Title: Oil in the fuel injection system
Post by: Paul99 on August 11, 2019, 12:36:29
I keep checking the status of the oil level via the small screw in plug on the injection system. All seems fine.

My question is how does the oil get there?  Is it fed by the engine? If not should I be changing it or not or just ensure the level is ok ?
Title: Re: Oil in the fuel injection system
Post by: teahead on August 11, 2019, 16:38:15
what year car you have?

Early ones were self-contained.

Later, it was fed by the engine oiling system.
Title: Re: Oil in the fuel injection system
Post by: Garry on August 12, 2019, 00:16:47

his info on signature shows as 66 230 sl
Title: Re: Oil in the fuel injection system
Post by: Benz Dr. on August 12, 2019, 01:36:06
his info on signature shows as 66 230 sl

I saw that too after I read it twice. It wouldn't be the first time I've fired off a quick response only to see later that I missed the mark.

I've made it a point to read through all posts carefully before answering and to spend a bit of time editing my posts before I hit send. Sometimes I do such a good job there's nothing left to send.  :)
Title: Re: Oil in the fuel injection system
Post by: Paul99 on August 12, 2019, 07:58:47
Yes its a fairly early car - oct 1966, uk car 230.   The oil looks very clean, but I haven't changed it for the past 9 years I have had the car.!  Not sure I could get the oil out to change it?
Title: Re: Oil in the fuel injection system
Post by: FresnoBob on August 22, 2019, 13:49:54
I too have a 1966 230 SL and was similarly concerned.  I talked to Bruno at Pacific Fuel Injection in South San Francisco and he advised that the oil should be measured by the screw-in dipstick at the rear of the pump (not the red plastic breather cap).  The pump can supposedly be drained by a screw below the knurled adjustment knob (the one that sets idle fuel flow), but I haven't done this yet.  I did top up the oil level when I started my restoration as it was nearly empty. 
Title: Re: Oil in the fuel injection system
Post by: Tom in seattle on September 17, 2019, 03:34:54
My IP is a 1967 250 SL .  I found that it was gaining oil in the dip stick. It is serviced by the oil pressure system but apparently has its own reserve systems as well.  I shipped it off and a gasket was replaced. Now the level seems constant.    Hope this is useful to know.