Hissing Sound

Freelander Kv6 Jordan

Member

Posts

35

Location

Jordan

• Oct 26, 2020

• #1

Dear,

I noticed a hissing sound comes from my gas/fuel cap filler when open it. It sounds a fully pressurized system or tank . So is this normal since my Jag doesn’t make this . Thank u.

 

Stanleysteamer

Well-Known Member

Full Member

Posts

45,046

Location

East Dorset

• Oct 26, 2020

• #2

More likely a partial vacuum in the tank cos your breathers a bit iffy.

 

Nodge68

Well-Known Member

Posts

32,954

Location

Cornwall

• Oct 26, 2020

• #3

Freelander Kv6 Jordan said:

Dear,

I noticed a hissing sound comes from my gas/fuel cap filler when open it. It sounds a fully pressurized system or tank . So is this normal since my Jag doesn’t make this . Thank u.

Click to expand...

It does build a partial vacuum, it's normal. Petrol do this, but not the diesels. Only the petrol freelanders do this, as they sealed tank system, the vapours being vented to the intake manifold to be burnt. Because the tank is vented to the intake manifold, it does build a vacuum, which is depleted when the cap is removed.

 

Freelander Kv6 Jordan

Member

Posts

35

Location

Jordan

• Oct 26, 2020

• #4

Aha, so good news that was normal. Thank u again!!

 

C

Colthebrummie

Well-Known Member

Posts

9,870

Location

Thatcham

• Oct 26, 2020

• #5

Unless of course it's a snake, in which case it won't be good news.

Col

 

Freelander Kv6 Jordan

Member

Posts

35

Location

Jordan

• Oct 26, 2020

• #6

Colthebrummie said:

Unless of course it's a snake, in which case it won't be good news.

Col

Click to expand...

Loll good one