landy-lee

Well-Known Member

• Jun 15, 2021

• #1

Aup

Just been looking at my injection pump and this rubber cap thing fell off with a small washer inside.

What is it and what does it do?

Cheers Landy Lee

 

neilly

Well-Known Member

• Jun 15, 2021

• #2

its the breather.
Tail goes down.

Cheers

 

landy-lee

Well-Known Member

• Jun 15, 2021

• #3

neilly said:

its the breather.
Tail goes down.

Cheers

Click to expand...

Cheers

should the washer sit inside the metal part?

 

neilly

Well-Known Member

• Jun 15, 2021

• #4

landy-lee said:

Cheers

should the washer sit inside the metal part?

Click to expand...

Yes it should.

Cheers

 

adrian hogg

Well-Known Member

• Jun 15, 2021

• #5

It is open to atmosphere to allow boost diaphragm to move down as turbo pressure increases. I think Bosch went a little over the top engineering it to keep shmoooo from entering as boost drops and pressure beneath diaphragm momentarily drops below ambient. Bung the washer back and tappy tap tap the housing to retain it then bung the rubber Johnny back on

 

Blackburn

Well-Known Member

• Jun 17, 2021

• #6

Is that a gauze filter in the hole?

 

discool

Well-Known Member

• Jun 17, 2021

• #7

Blackburn said:

Is that a gauze filter in the hole?

Click to expand...

It is gauze and helps prevent oil from escaping along with the vented fumes, thats the theory.

 

L

lynall

Well-Known Member

Full Member

• Jun 17, 2021

• #8

Sadly they dont work if you do any deep water off road stuff, the fuel pin under the sliding piston will seize up.
Fine for road and light laning though.