pwood999

Well-Known Member

Full Member

• Jul 31, 2024

• #1

So after changing the diaphragm valve last week on the Green P38, is now making a strange squeak after it dumps air out the EAS exhaust !! It's easy to hear becasue my EAS has had the silencer removed for years (mainly becasue it makes pedestrians jump), and I can hear how often the pump switches on & off.

I get two distinct noises:

1) 1-2 second squeak similar to a pulley bearing when the pump stops & the gallery gets vented.
2) Asthmatic wheezing when the block is doing its tickety-tick and adjusting up & down.

This is new one on me. Never heard it before on any of the valve blocks I've refurbished !!

 

Datatek

Well-Known Member

• Thursday at 07:41

• #2

pwood999 said:

So after changing the diaphragm valve last week on the Green P38, is now making a strange squeak after it dumps air out the EAS exhaust !! It's easy to hear becasue my EAS has had the silencer removed for years (mainly becasue it makes pedestrians jump), and I can hear how often the pump switches on & off.

I get two distinct noises:

1) 1-2 second squeak similar to a pulley bearing when the pump stops & the gallery gets vented.
2) Asthmatic wheezing when the block is doing its tickety-tick and adjusting up & down.

This is new one on me. Never heard it before on any of the valve blocks I've refurbished !!

Click to expand...

Sound like a dodgy diaphragm valve to me.

 

Flossie

Well-Known Member

• Thursday at 09:15

• #3

I've only ever done one vb, mine.
But an o ring not seated can make some weird noises. From memory, and you'll know this for sure, the diaphragm end is easy to take off and recheck. And the spring, I'm sure, you did refit.

 

pwood999

Well-Known Member

Full Member

• Thursday at 09:22

• #4

I thought dodgy valve or oring as well. Wife's Freelander MOT takes priority today though.

 

Henry_b

Think outside, no box required.

• Friday at 21:54

• #5

I had very similar with mine, it was the diaprahm valve which had corroded to nothing..

 

Henry_b

Think outside, no box required.

• Friday at 21:59

• #6

 

pwood999

Well-Known Member

Full Member

• Saturday at 16:06

• #7

[Update] Popped another diaphragm in on Thursday evening, and all sorted. Rather than a fault with the diaphragn, I think it was just not seated properly.