Had to go through a fair bit of water yesterday..


Did the semi.sensible thing:

Watched the 4 vehicles coming other way all go through it to gauge depth..

No great issues.. @30cm deep : 12 inches

Went through ..central 'crown' of road

Just past halfway in the water.. 2nd gear 10mph.. it all felt like it was slowing up.. so was glad when it chugged out the remaining 20 metres to dry asphalt.

Even before this ..the motor had gone 'offsong' when crossing the running water
Pouring down hillsides..

But at this low point in a rural B road
It really wasnt happy..


I made a point of doing a few steady miles before using any boost.. and it did seem happier.

LOTS of condensation in the cabin too

So may well have damp carpets..


Just wondered what would tail off the power.. when it shouldnt directly effect 'ignition'

Of course there will be a fair bit of 'cooling'
Both oil (sump).
Air (intercooler) and motor itself

The o2 sensor relies on being hot to work closed loop.

My theory would be if you cooled the o2 sensor rapidly in a car that’s not designed for it, would it upset the ECU causing rough running till it warms up again

AndyRKett said:

The o2 sensor relies on being hot to work closed loop.

My theory would be if you cooled the o2 sensor rapidly in a car that’s not designed for it, would it upset the ECU causing rough running till it warms up again

Click to expand...

Probably not just that if the water was against the sump the engine would also have been cooler a fair bit too

Yes..
I was wary of being too fast..or slow

And as it was 90 miles into a 110 mile trip.. and in 'the wilds..'

Breaking:drowning it wasnt a good idea.

MAF is supposedly intolerant of water.. but thats just a great way to avoid water injestion


Car wasnt 'sick' as such..

Just a lot less free running and powerful than 10 mins before..

Not quite like a wet petrol though..

Back-pressure in the exhaust due to tail pipe being immersed in water ? This explains also the quieter engine ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)

I dont think I would have braved 12" of water

air intake is quite high, its just near the bonnet slam panel and it would take its air from the front grille, but of course should the engine bay get a lot of water in it then it might draw some in from other places on the air box [I think there are water drain holes in it, could ingest water too from those if it was swamped]


is it all running as normal now?

Yes running fine.. only the mild tailing off in performance made me raise the question

Covered another 200 miles since..

Still at 65 mpg

As I said .. avoiding it would mean 20 mile detour..

And other traffic was coping with it
But being pretty rural.. they were all taller than a grande

We know now why those "Rangies" and other "Landies" have the plastic schnorkel at the A pillar ...

;-) Bernie

Well, TBH, pretty sure most are just for pose value.
To do it properly you need extended axle breathers, bell housing drain, exhaust snorkel, relocated ECU... the list goes on and on.
Just sticking a pipe on the air filter box and wading deeper than a few inches is asking for trouble, even in an old-school Landie.
Been there, done that. Then went back and did it properly!