m998 hmmwv hissing noise

[Bulldogger]

It’s a solenoid operated valve not a vacuum pump. One moving part inside. It gets pressure and fluid from the steering pump. I figure the reason why it hisses for some of us and not others is down to individual vehicle characteristics of fluid type, amount of use, age of components and so on.
Bulldogger

 

[Action]

Ok well here is my quandary. If it's normal then why don't all hmmwv's and H1's do it? If it's normal then why doesn't putting a piece of rubber under the part mess it up? Lastly, anywhere I look indicates this sound is from a faulty vacuum pump and that hissing isn't normal on other (non hmmwv) vehicles. I know I'm new here but my 1097a1 is doing this hissing as well and I'm a bit of a perfectionist to the point I want my vehicle to be like it's brand new (function wise) although it's a 2009.

Not to be a party pooper, but if you want to get your m1097a1 back to new specs, you should shoot for the early '90s, not 2009.

 

[Natron]

Yes, my fault there, it's '99 with rebuild date of 2009 on engine and B pillar. I'm always forgetting that, lol!

 

[teteacher101]

Pics if possible? That sounds like a good idea!

Here ya go!

 

[Natron]

Great, thanks!

 

[RJTM998]

Cadillac valve, undo the band clamp and slide some rubber in there to isolate it. It'll go away.

Fixed mine. Thanks

 

[BAJATMMBC]

Hi.. I need the hose that goes from the cadillac valve to the radiator, any Idea where to buy it?

 

[TOBASH]

True story:

My M1165 is parked on my buddies land in California. His dog went by and there was a hissing sound. It was a rattlesnake.

 

[Mogman]

Hi.. I need the hose that goes from the cadillac valve to the radiator, any Idea where to buy it?

3/8" power steering return hose, purchased by the inch at your local auto parts store.
I buy Gates in 25' rolls online.

 

[juanprado]

Hi.. I need the hose that goes from the cadillac valve to the radiator, any Idea where to buy it?

Napa or a hydraulic hose shop would have the correct specd double walled push on hydraulic/oil compatiable hose. Don't use fuel line from autozone or such.