10 replies to this topic

[Agus1601]

Hi Guys! Today finally I got my car running ok but then I checked the dashpot damper and it is very difficult to fit in.

 

That means there is too much oil on dashpot or that it needs some? Which would be the correct level of oil to use?

 

Thanks

Agustin

[jime17]

There needs to be some resistance up and down. That's how it works. How hard actually is it.? I just usually top it up to near the top of the neck.

Edited by jime17, 17 July 2016 - 08:41 AM.

[Compdoc]

I read an an article on an SU carb rebuild recently and it suggested the dashpot oil level should be just below the top of the inner piston if you have a vented screw on cap. If the cap is non vented then the level should be just above the top of the inner piston. If the damper is very hard to push in, it could have been filled up with engine oil which is too thick and will slow the piston. I seem to remember SU recommending a thin oil such as 3 in 1.

[grck1]

Technically the correct oil should be su dampener oil as made by su themselves.
This is what I use and have no problem with it.
Dont know why people say engine or 3in1 as neither are the correct item and the correct oil is easily available.

[madaboutcherry]

sae 20 is the nearest to su oil, and a lot cheaper.

[Dusky]

I keep wondering ( over and over again) why people pay 100's of pounds to buy stg 1 kits and stuff to make their mini go faster, but try to skimp on 5£ for a bottle of SU oil.
Yes, different states of tune will need a different oil in the dashpot, I'm fully aware of that. But for probably 75% the SU oil will give excellent results.

[Agus1601]

Hi Guys! Sorry for my english, I live in Argentina. I have su oil which I also bought but I have quite few of it and they do not send oil by airplane any more. So... I have no problem in fitting the one I have left but I have the original dashpot damper, it is very hard to fit it... I remember it was much better before when using same oil as engine.

 

How can I check the level of the dashpot? Yesterday I used a flash light to see where it was but it was much of a guess to really understand it, are they no exact proportions for it?

 

Thanks

Agustin

[Compdoc]

http://static.mgexp....t_oil_level.jpg

 

The oil does not provide any lubricating properties, its there purely for its viscosity. I've seen people use brake fluid, engine oil and all sorts. Its whatever floats your boat!

If only I was a bit more anal, I might be able to work up the enthusiasm to spend £5 on a bottle of dashpot oil.

[CityEPete]

I've got proper su oil, found it too thin and went back to 20/50, billions of miles must have been driven in cars with su carbs with 3 in 1 or engine oil in without issues.

[MRA]

As 3in1 is SAE20 it is totally acceptable, engine oil on the other hand is not acceptable because it is a multigrade and changes viscosity with temperature increases therefore changing the tune of your engine as it gets hotter.

[Agus1601]

I am using original SU oil guys, but wanted to know how much did it needed, also changed needle and it is working quite better now

 

Thanks for all your answers

Agustin