Richard Kovac replied:

jdpatrol
Not a smart thing to do putting your and over the inlet,
You can cause a lot of damage to your hand drawing blood to the surface

If you need to test in this way I would suggest using some heavy cardboard or a like

I also think the engine would stop long before all air supply was cut off

Richard

at4x4 replied:

easier still, put a plastic shopping bag over the snorkel head.

You will hear any leaks very easily then, because of the amount of air the engine tries to draw through the leak.

Haza replied:

The air will take the path of least resistance, by doing any of the above methods I'd be confident that it is sealed correctly. If you have a frog mouth (oneway valve) on your Air box just make sure it is cleaned out and working properly.

Exploder replied:

Pressurise it, just be careful how much pressure you pit into it as you may damage the seals you just made or create new leaks. Also you will be surprised at how much air can escape.

Was testing a new hydraulic system the other day before we did the flushing and fully pressurised it, with just pressurised air at 7 bar ( 73 Psi) we were finding pinhole leaks in welds and fitting’s, and this system operates at around 3500 PSI!!!.

I think you may find more leaks in the snorkel set-up than you want to know about but 90% of them will be so small they will not case any problems anyway.

Member - Nick (TAS) replied:

I was testing our vehicles snorkel for leaks before we headed away to Cape York a couple of years ago with a plastic bag over the ram.All was good,motor was starting to die,couldnt hear any leaks(head close to engine) when all of a sudden"BANG",nearly fell over backwards.Shut off engine and started to worry a little until I realised the plastic bag popped.PHEW

jdpatrol replied:

thanks all
will check using plastic bag over ram.
jd

D-Jack replied:

The correct way to do it would be to put your face of over the intake - if your eyes are pulled out of their sockets and you have to pull them out to the intake by the nerves at the back, then .... well... still got no idea if the snorkel is sealed .

Billowaggi replied:

Hi all .The best way to check for any induction leaks on a diesel is to spray a little Aerostart around all the joints with the engine running a change in engine sound or speed will indicate a leak,do it sparingly though.
Regards Ken.

Billowaggi replied:

should be no problem JD Aerostart is mostly ether and you are only puttig in a bit of vapour. I yous' to pre deliver new Ford tractors this was the method recomended by Ford to test the air induction pipes and joints between the air filt and engine. Ingress of dust was the main prob we were looking to prevent ,this is critical with a 4wd as well
Regards Ken