Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: balimatharu on November 27, 2018, 11:21:38

Title: Oil pump
Post by: balimatharu on November 27, 2018, 11:21:38

I am reconditioning the engine for my 250sl. The oil pump needs replacing. I am trying hard to source this. No luck. There is a good bit of play in the bush bearings and the housing is scored. The two gears look reasonable condition.
Any suggestions where to get the pump from or can I change the bushes.
I am based in UK
BALI

Title: Re: Oil pump
Post by: ja17 on November 27, 2018, 16:23:30

Most are using a oil pump from a latter MB engine. It fits and works fine and has a slightly higher output. I believe the pick-up needs to be changed, then it bolts right up. Bud's sells them, but you can save if you figure it out yourself. I think it is the oil pump from the Mercedes 6cyl M110 engine.

Title: Re: Oil pump
Post by: balimatharu on November 29, 2018, 09:12:52

Thanks
I will follow that track.
Bali

Title: Re: Oil pump
Post by: Jack Jones on November 29, 2018, 23:55:00

I purchased the newer pump from Metric Motors and upon closer inspection it is from a M110 engine. A little more pressure can't hurt.

Title: Re: Oil pump
Post by: Benz Dr. on November 30, 2018, 02:51:30

They are M110 oil pumps with a pressure relief valve right on the pump. These pump are higher volume which in turn can create higher pressure.

Title: Re: Oil pump
Post by: balimatharu on November 30, 2018, 08:40:16

Dear Jack
Benz Dr.
Thanks for the reply. I have located a pump from M 110. It is supposed to be an original Mercedes pump no. 1101801702. It is a new pump sitting in a shop in Cyprus. This pump has no relieve valve on it. Only difference is the pickup. From the pictures it looks the pickup could be swapped.
I will wait for a few days and see what else comes up.
The relieve valve in the engine could be sufficient to control the pressure.

Bali

Title: Re: Oil pump
Post by: balimatharu on December 11, 2018, 23:03:39

Received the pump. I swapped the pick up. With the swapped pickup, the overall length is 7 mm shorter. It will sit 7 mm higher in the oil pan. Should that be acceptable?
Bali

Title: Re: Oil pump
Post by: Shvegel on December 11, 2018, 23:32:48

Should be fine.

Title: Re: Oil pump
Post by: ja17 on December 12, 2018, 00:12:05

Bali, I am not sure what version lower oil pan you are using. Here is some additional information. The latest version M130 engine and used a 7mm deeper lower oil pan (ribbed bottom and 13mm drain plug). Oil capacity was increased by 0.5 liter. A rubber extension was added to the oil pick-up for the increased depth in conjunction with the new style, deeper oil pan. All details and part numbers for this change are described, in detail, in the late BBB supplement (July 1973), p. 18-6/1 and 18-6/2 .  During repairs early oil pans are normally replaced by the later deeper oil pan. Recognize the later lower oil pan by it's ribbed bottom and its 13mm head drain plug.

Title: Re: Oil pump
Post by: balimatharu on December 15, 2018, 09:19:50

Thank you for your reply.
It has original sump. I checked with the dipstick in and found that the dipstick is higher than the bottom of the pump.
Thanks