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  #61  
Old 03-27-2016, 05:52 AM
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Re: WK2 Snorkel

Thanks Hutch.
Just doubled checked and those holes aren't in mine. I'll be getting the drill out tomorrow.

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  #62  
Old 03-27-2016, 11:31 PM
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Re: WK2 Snorkel

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Originally Posted by Wadeaus View Post
Has anyone here with a Murchison snorkel had any issues with water getting in the air box when driving in wet weather for extended periods of time?
I drove for 4hrs from Geraldton to Perth in the wet yesterday and found the paper air filter completely saturated, which I'm assuming was causing my acceleration issues due to restricted airflow.
If anyone has had this issue, have you come up with a solution? I'll speak to Murchison before I do anything but atm I'm thinking of either drilling some holes at the back of the intake part to allow some water pass through or maybe a baffle or something in the air box to direct water down instead of up into the filter.

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The Australian Army's Mercedes-Benz built G-Wagons come with snorkels pointing to the rear. I once asked the supplier why this was so when all after-market snorkels point forward. In typically Teutonic style, their reply was short and sweet, "It keeps water out".

Also, I've yet to see any factory fitted snorkel that points forward. The forward facing snorkel has a lot to do with the attractiveness of the air ram look. Ironically, sports car manufacturers that have experimented with air ram intakes, have abandoned them because of variable performance with speed, wind direction and buffeting. F1 cars use air ram but they need a huge plenum box to make it workable.
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  #63  
Old 03-28-2016, 12:13 PM
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Re: WK2 Snorkel

I've noticed a few racing 4wds these days with custom snorkels that point backwards. After seeing how much water I sucked in I can see why.
If you look closely you can see a bit of moisture in the air box section after the filter, there was a nice little puddle in the bottom section ImageUploadedByJeepGarage1459181194.282737.jpg
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  #64  
Old 06-19-2016, 12:05 AM
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Re: WK2 Snorkel

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Originally Posted by Wadeaus View Post
I've noticed a few racing 4wds these days with custom snorkels that point backwards. After seeing how much water I sucked in I can see why.
If you look closely you can see a bit of moisture in the air box section after the filter, there was a nice little puddle in the bottom section Attachment 66748
Yes I have the same problem.
I came back from Melbourne in the rain Friday and as I reached home the engine warning light came on. I couldn't find the problem until I checked the air filter; absolutely soaked!!!!

Had the Murchison snorkel fitted last week and agree it does not have correct water bypass fittings.

I've had a few snorkels in my time but never one that filled the air box with so much water that it soaked the air filter. It has to be really bad/deep to soak the filter so thoroughly. My previous snorkels have all been Safari units.

There should be a water catch and drain tube at the bottom of the solid snorkel before the duct levels out to cross the wheel arch and flow to the air box. This has to be in a position to prevent water ingress during water crossings or it is useless.

2 holes at the back of the snorkel head DO NOT do it for me. I regard this as a MAJOR DESIGN FAULT.

I'll talk to Murchison tomorrow.
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  #65  
Old 06-19-2016, 12:37 AM
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Re: WK2 Snorkel

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Originally Posted by Unbound1 View Post
Yes I have the same problem.

I came back from Melbourne in the rain Friday and as I reached home the engine warning light came on. I couldn't find the problem until I checked the air filter; absolutely soaked!!!!



Had the Murchison snorkel fitted last week and agree it does not have correct water bypass fittings.



I've had a few snorkels in my time but never one that filled the air box with so much water that it soaked the air filter. It has to be really bad/deep to soak the filter so thoroughly. My previous snorkels have all been Safari units.



There should be a water catch and drain tube at the bottom of the solid snorkel before the duct levels out to cross the wheel arch and flow to the air box. This has to be in a position to prevent water ingress during water crossings or it is useless.



2 holes at the back of the snorkel head DO NOT do it for me. I regard this as a MAJOR DESIGN FAULT.



I'll talk to Murchison tomorrow.

Out of interest, do you have the two holes at the back, as I have checked mine a few times after rain and no issues and when u r driving in the rain the water does clearly come out of those holes.


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  #66  
Old 06-19-2016, 12:52 AM
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Re: WK2 Snorkel

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Originally Posted by Hutch801 View Post
Out of interest, do you have the two holes at the back, as I have checked mine a few times after rain and no issues and when u r driving in the rain the water does clearly come out of those holes.


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No I don't have the 2 holes. I don't see why the 2 holes are an acceptable solution either functionally or aesthetically. Putting 2 holes in a basically flat back of the snorkel (apart from the small expressed box) strikes me as incapable of catching all the rain. Whereas a bypass as I described placed low in the snorkel tube should clear all water entering it.

Furthermore the installation instructions, that had to be sent separately as they were not in the original snorkel package, did not mention any need to drill the 2 holes you ask about.
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  #67  
Old 06-19-2016, 02:10 AM
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WK2 Snorkel

If u look at the back of head of the snorkel there is a little raise box, my understanding as the water goes in, the air forces it into the little raised or protruded area, the two holes drilled in there then allow the water to escape, I have them u don't notice them and from what I have seen they work well.
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  #68  
Old 06-19-2016, 05:25 AM
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Re: WK2 Snorkel

All snorkels need a way to separate water from the airflow and it usually happens at the head, I don't know of any snorkel that has a bypass, most use slots in the head, that is why you are not suppose to push the head all the way down on the body


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  #69  
Old 06-19-2016, 07:22 PM
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Re: WK2 Snorkel

I barely notice the two holes I drilled in mine. Although I'm yet to see how well they work, as I haven't done any wet driving since drilling them.

If they do job though, it's a quick and simple fix.
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Old 06-19-2016, 09:01 PM
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Re: WK2 Snorkel

See Car experiment shows extent of flood danger - ABC News (Australian Broadcasting Corporation)
A Nissan Patrol actually floated in 95cm of water. If one intends to drive though water deep enough to need a snorkel one should be prepared to keep a door open. God knows what that would do to the battery or the quadra-lift electronics never mind the carpet or the seat electrics.
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Old 06-19-2016, 10:34 PM
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Re: WK2 Snorkel

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Originally Posted by BobT View Post
See Car experiment shows extent of flood danger - ABC News (Australian Broadcasting Corporation)
A Nissan Patrol actually floated in 95cm of water. If one intends to drive though water deep enough to need a snorkel one should be prepared to keep a door open. God knows what that would do to the battery or the quadra-lift electronics never mind the carpet or the seat electrics.
Now that was a surprise. The Patrol actually became buoyant earlier than I thought. Obviously why so many get caught out.
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  #72  
Old 06-20-2016, 02:27 AM
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Re: WK2 Snorkel

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Originally Posted by Wadeaus View Post
I barely notice the two holes I drilled in mine. Although I'm yet to see how well they work, as I haven't done any wet driving since drilling them.

If they do job though, it's a quick and simple fix.
I did speak with Stuart of Murchison this morning and he claims they are drilling 3 x 8mm holes in all heads now. BUT mine fitted 10 days ago and supplied by Murchison did not have the 3 holes, nor did the fitting instructions (that had to be requested because they were not with the snorkel. They were sent from Murchison by express post, I was told.) mention the need to drill the holes. Instructions were Rev1.1 21/5/2015 but Stuart couldn't confirm current version.

Stuart claimed that the 3 holes should be in the lower edge of the extruded block back at the rear of the snorkel head, NOT in the middle as earlier photos on this forum show. These holes are supposed to create a venturi effect that will blow the water out of the snorkel.

I can see the holes working in light to moderate rain but can't see them being capable of clearing sufficient water in very heavy rain. Just look at the surface areas and you can see the volumetric measures show that heavy rain will allow more water into the snorkel than can escape through 3 x 8mm holes. My Jeep fitter agrees with me and is looking for alternatives. He will discuss with Murchison.

So it has cost me a new air filter, almost an engine and considerable anguish to discover this design fault. As a temporary measure I have drilled the holes but this is not a proper solution. Just because it looks good does not mean it is.

I'll keep you posted.

PS. I now have over 92,000km on this car since purchase in October 2014 and drive in all weathers. It is one of two cars I'm using. The other has over 312,000km and its Safari snorkel has never created a problem. It drains correctly without the drilling of holes.
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