Wading.

[Dougal]

We all know that landrover recommends a max wading depth of around half a metre.
But Isuzu in their 85 NPR handbook recommend a max wading depth of 1 metre.:o
With recommendations to close the foot air vents first.

[lokka]

We all know that landrover recommends a max wading depth of around half a metre.
But Isuzu in their 85 NPR handbook recommend a max wading depth of 1 metre.:o
With recommendations to close the foot air vents first.


Back in the late 80's it was common practice to wade the old isuzu stage 1 in 1 meter or more of water with out any problems :D:D:D

[Sprint]

gotta remember, the only thing the NPR and a stage 1 have in common is the isuzu engine...... air intake height is a major factor in wading, as is the exhaust height

[Dougal]

gotta remember, the only thing the NPR and a stage 1 have in common is the isuzu engine...... air intake height is a major factor in wading, as is the exhaust height

Air intake certainly, the NPR's had their factory intake right up the back of the cab. But I don't see the exhaust causing many problems. Some extra backpressure from being underwater but that's about it.

[lokka]

Yep well the stage 1 never had a snorkel and the intake was directly behind the rocker cover and never had an issue the trick to deep water is constant speed to create the bow wave :D:D:D

[Sprint]

Air intake certainly, the NPR's had their factory intake right up the back of the cab. But I don't see the exhaust causing many problems. Some extra backpressure from being underwater but that's about it.

ever heard the saying "if you dont ****, you die"?

same principal with an engine, backpressure is a good thinkg to a point, but too much has the same effect as holding your hand over the intake so no air can get in

[kaa45]

Exhaust isn't a problem unless you stall with it underwater

[JDNSW]

I have frequently driven my 110 well over the recommended depth, occasionally to the level of the top of the guards for very short distances, with no ill effects. Make sure you have the wading plug in though. The air intake is in front of the vent on top of the guard, so even a bit of water coming through there does not go into it, and the water coming in the front through the radiator will take a while to rise to the same level as outside, particularly if you maintain a bow wave as suggested.

John

[Dougal]

ever heard the saying "if you dont ****, you die"?

same principal with an engine, backpressure is a good thinkg to a point, but too much has the same effect as holding your hand over the intake so no air can get in

The Isuzu engines are made to take either an exhaust brake, a turbo or both. They run fine with exhaust backpressures above 30psi.

You need to be 20m underwater to get 30psi pressure.

[lokka]

The Isuzu engines are made to take either an exhaust brake, a turbo or both. They run fine with exhaust backpressures above 30psi.

You need to be 20m underwater to get 30psi pressure.


At 20m as long as it had fresh air id put money on a isuzu still chuging along :D:D:D

[isuzurover]

At 20m as long as it had fresh air id put money on a isuzu still chuging along :D:D:D

Only problem might be the standard breather (vents to atm), it would hold an airlock up to a couple of meters depth, but at 20m - you might get a bit of water in the sump oil. Not to say the engine wouldn't still run though!

[Dougal]

Just sometimes, I wonder if we might be talking these engines up just a little too much.:D

[kaa45]

Just sometimes, I wonder if we might be talking these engines up just a little too much.:D

Who us?......NEVER :p

[Blknight.aus]

Ive seen a 2.25 diesel from a series running about 5m underwater....

for no other reason than we could and the only reason we didnt let it roll deeper into the dam was the snorkle was only about 20cms above the water and it was a little windblown...

winched it out then drove the paddock basher home...

The seat was a little squishy and the brakes were a little more vague than usual.

[kaa45]

Ive seen a 2.25 diesel from a series running about 5m underwater....

for no other reason than we could and the only reason we didnt let it roll deeper into the dam was the snorkle was only about 20cms above the water and it was a little windblown...

winched it out then drove the paddock basher home...

The seat was a little squishy and the brakes were a little more vague than usual.

Why doesn't that surprise me? I'd believe anything you did, Dave.
Danny :eek:

[DRanged]

I have no doubt's about the 4BD1 having no problems swimming, but in the Tweed floods a couple of years ago we rescued a couple of cars ( people still inside):cool: in very deep water (lapping the windscreen wipers on a 6'' lifted RRC). The motor was faultless but the ancillaries suffered.

1) starter motor failed
2) aircon tensioner pully bearing failed
3) clutch pushrod and thrust bearing seized
4) both alternaters failed due to crappy water

not to mention a full fluid change afterwards.

Wont be doing that again as no one coffed up $$ to repair it

Justin