Thread: Snorkels

I don't have the full specs at hand, but if the mimimum cross-sectional area is=> 100dia of the Air intake then it is ok.
Remember that the 4BD1 is larger but lower revving than a Tdi/ 5/ ci

flow= (capacity-inefficiency)rpm

Originally Posted by Barefoot Dave

Tell 'em Dave sent you

me dave, that is, not you dave. That would be silly.

Thanks Dave.

I'll be sure'n to wear mah boots too, to further avoid confusion.

Originally Posted by Barefoot Dave

I don't have the full specs at hand, but if the mimimum cross-sectional area is=> 100dia of the Air intake then it is ok.
Remember that the 4BD1 is larger but lower revving than a Tdi/ 5/ ci

flow= (capacity-inefficiency)rpm

A turbo also makes a big difference when working out airflow requirments. When you do the calcs, a Tdi snorkel should be more than adequate for a n/a 4BD1. (Tdi/Td5 needs way more air).

So the Safari/cheap ebay tdi/td5 snorkels are probably fine from an air flow perspective. Actually the Safari copies on ebay for around $125 are not too bad quality wise - fitted one of the cheapies recently to a mates 130 and we were both surprised by the quality and fit. Whether they look ok on a Perentie is a matter of opinion.

To the OP: I wouldnt be too concerned by a splash into the air vent - the grilled inlet to the flexible air duct should be facing down and back and it would take much more than a splash to cause a problem. If you have a snorkel and are actually in water deep enough to really warrant it (assuming your airbox and all ducting is watertight) there will still be other issues to consider eg fuse panel and relays, radiator fan, breathers etc.

Hi Mark,

True, the air intake is positioned as you say. It wasn't really a full blown panic attack, just a mild one.

I've always assumed it only takes a little water to hydraulic a diesel, so it does bother me. Electrics I can fix. But I am def no diesel mechanic.

I briefly submarined a petrol 4wd many years ago. Air intake was high up in the engine bay, but it copped a bit of moisture (as did the passengers via the leaky door seals). Engine coughed and spluttered for a minute or 2 after the crossing. I wouldn't want to do that to a diesel.

Originally Posted by DBT

Hi Mark,

True, the air intake is positioned as you say. It wasn't really a full blown panic attack, just a mild one.

I've always assumed it only takes a little water to hydraulic a diesel, so it does bother me. Electrics I can fix. But I am def no diesel mechanic.

I briefly submarined a petrol 4wd many years ago. Air intake was high up in the engine bay, but it copped a bit of moisture (as did the passengers via the leaky door seals). Engine coughed and spluttered for a minute or 2 after the crossing. I wouldn't want to do that to a diesel.

Possibly may have been the effects of water on the ignition system which caused the coughing and spluttering?
I'm not against snorkels but I have seen the results of the false sense of security they sometimes cause. A mate with a snorkel hydrauliced his 4BD1T powered 110 due to the air box end cap taking in water. We pulled the glow plugs and cranked it, resulting in a spray of muddy water from each cylinder. After clearing these and draining the turbo it eventually tow started. Then after several changes of all the oils in the vehicle and sorting out some electrical issues, its been running well for the past few years. Probably a testament to the toughness of the engine, or maybe his luck...

I look at a snorkel as insurance for that time you stuff up and drive though water a bit deeper than normal , not for driving around up to the windscreen :what:

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Originally Posted by Bushy049

I look at a snorkel as insurance for that time you stuff up and drive though water a bit deeper than normal ,not for driving around up to the windscreen

Yeah. I think that's a Jeep thing?

I plan on making a custom snorkel using geberit mapress stainless steel piping it's available in the correct sizes, looks better than a professional one, lasts a lot longer.... It's a great product for this sort of thing. Just an idea if people want to make one themselves...



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