On Mon, 17 Feb 2020 09:06:05 +0000, tony sayer wrote:
I'd have thought the biggest problem are absorbent materials such as
underlay, noise insulation, carpets and seats which can never be 100%
dried out. To put right you'd need to strip the interior down to a shell,
and replace all the sodden items - not cheap. Going back to the 1990s,
plain seats were £400 a pop brand new, so that's £1,600 plus vat plus
These days they're a lot more sophisticated. Also you have all the
gubbins like seatbelt pretensioners that I imagine need changing.
No idea if catalytic converters enjoy being submerged either.
And then there's the "little" problem of water entering the engine while
it's running. If anyone is driving through water and it gets into the air
inlet, the engine will quickly demonstrate how incompressible water is
compared with air. My brother-in-law drove into a large puddle across a road
at a fair speed (it was at night and the headlights didn't show the water as
looking any different from the road surface, so he was driving at an
appropriate speed for what looked like a straight road clear of hazards).
Luckily he kept control of the car - it didn't skid out of control - but
water got into the engine and knackered it. Being a diesel, with a greater
compression ratio, the damage was worse. Fortunately his insurance paid for
a new engine.
I'm not sure what exactly failed, but the engine would still turn over (but
not fire), so evidently the connecting rods, crankshaft and
cam-shaft/valvegear were all still intact. It may have knackered the
injector pump: I'm not sure how the pressure of water in a cylinder with the
piston at TDC compares with the pressure under which fuel is normally
injected into the cylinder, and whether back-flow up the injector port to
the pump would have been possible.
I can vouch for how difficult it is to get the inside of a car clean and
dry. A former car flooded to a depth of several inches when the drain holes
from the gutter at the base of the windscreen got blocked and it overflowed
into the car following torrential rain overnight. That required me to remove
the front seats, gear lever housing, carpet (top and underlay), and get the
carpet professionally cleaned (I was able to wash the underlay in the
washing machine). I discovered it just as I was about to set off on a
business trip, so apart from mopping up the excess with every towel in the
house, I couldn't do anything about it for a couple of days, by which time
the water started to pong. I got it all sorted out, and I learned a lot
about how the seats of a VW Golf are fastened to the floor and how to
unscrew the gear lever housing. That was in the days before air bags, so
there were no "bum-on-seat" detectors and also no heated seats, so no
cabling to disconnect.
This storm was very well forecast many days ago, and anyone
paying attention to the jet stream and weather over in the USA
would have guessed quite accurately that we were in for a 2013/14
type of weather event even further back.
The Met Office have been giving yellow, amber and latterly
red alerts, so anyone ignoring those warnings and then
damaging their car might find insurance cos being reluctant
to pay out, just like they try to wiggle out of accident
or illness claims to anyone on holiday abroad.
Indeed! But also there was that bit of vid on the BBC news showing a
street in Wales I think were a Audi was bombing down the road with water
up to and then over its bonnet makes me wonder just how it kept on f
driving maybe the air intake is just that little bit higher?
Course no ones teaches anyone how to drive in a flood anymore do they
just go as fat as you can and hope you'll make it thru!..
Unless its the Welney wash, been though here a few times quite hairy but
this blokes got the right sort of wagon!
Man is least himself when he talks in his own person.
I've been told driving at more than a crawling pace can create a bow wave
that keeps the engine air intake above the water. But just passing that on
with zero experience of doing so. The old Rover has the air intake as low
as possible to get the coldest air. So avoid puddles with it. ;-)
*Don't use no double negatives *
Dave Plowman email@example.com London SW
On Mon, 17 Feb 2020 14:46:10 +0000 (GMT), Dave Plowman (News) wrote:
Well I got away with driving through a flood with the water lapping
up onto the bonnet like that Audi but it took a lot of throttle and
clutch slipping in 1st just to keep the thing moving and not letting
the water get further up the bonnet. Water does not want to get out
of the way like air...
I suspect that there is an "optimum" speed for going through a flood.
Too fast and water is thrown up into the engine compartment soaking
distributer or plugs, leads, coil packs or getting injested. Still
has to get past the air filter but I guess a soggy air filter won't
let enough air through. Too slow water can rise up into the engine
compartment with similar effect. "Optimum" the water doesn't get a
chance to rise up behind the grill, radiator, oil coolers, aircon
condensor etc. So the engine stays dry.
The low down starter motor was never quite the same after my deep
flood drive but nothing else suffered.
I am very cautious about driving through flood water, both from the point of
damage to the engine and the car being washed away by fast-flowing water.
I notice that this ford https://goo.gl/maps/XJtySvYQYFZ8UYX49 has a metal
rail to prevent cars being washed off the ford. I've seen a 4x4 driving
through this ford when it was in spate (we parked where the red car is in
the photo, and looked at the flooding from the old bridge alongside the
ford) and the driver was having to steer suddenly away from the barrier as
he entered the water - which was about 2 feet above the road and really
This ford https://goo.gl/maps/XxWwtzKK88CkbLKt7 and
https://goo.gl/maps/y962wBCWRJyvHpLN8 is an intriguing one, because you
drive along the *length* of a stream for about 100 yards. The first time we
encountered it, I stopped and my wife walking along it in bare feet to check
that it didn't get any deeper, before coming back and telling me it was OK.
I wouldn't like to try either ford when they were full. I remember driving
down to the second one when there had been heavy rain, with no intention of
going through, but just to see how high it could get. You have to reverse a
long way to get to a turning-round spot, if the one by the gate in
https://goo.gl/maps/XxWwtzKK88CkbLKt7 is several feet under water ;-(
Cycling through that ford is scary because even when the water is at its
normal level and flow (as in the photos) the current tries to move the bike
wheels off course as you turn the corner at the far end
The ford at Ide, in Devon, is similarly long - said to be the second
longest in Europe. Basically, it a fairly flat stream, bed that you
just drive along. Can't remember how long it is, but I drove along it
just for the hell of it and to be able to say I'd done it, back in my
student days. You just hope you don't meet someone coming the other
way! https://www.geograph.org.uk/photo/1080565 and
Land Rovers are excellent because a) the door seals leak and let in
water so they don't float and b) they have flat floors without sills so
having exited the water just open the door and the water flows out. Best
to be wearing wellies though.
On Mon, 17 Feb 2020 17:05:57 +0000 (GMT), "Dave Liquorice"
BIL took us round an off road course in Abingdon a few years back in
his 2L auto diesel Discovery. It was probably the first (and last)
time it had ever been properly off road during his ownership.
At the end of the course was a long trench full of muddy water. The
idea is you gunned it though this and saw how high you could spray the
Given this was his only / family car and daily driver we assumed he
was going to go though it like Ms Marple. No, to our surprise he did
give it some (for a 2L auto, 4 up) and I saw the water (just) come up
the front windscreen (and no snorkel)!
The Fire Brigade were there hosing the cars off for a charity donation
but nephew wanted to leave it as is for the drive home so we just
wiped lights and number plates etc. Apparently it had to be left like
that for a forthright for all nephews schoolmates to see. ;-)
However, about a month later the alternator failed and whilst it could
have been a coincidence, we think it was a side effect of it's muddy
I have to say, given the lack of experience of the driver, it only
being a 2L diesel, std fit tyres and an auto ... and without any diff
locks, it handled the course very well! 
Cheers, T i m
 The towbar did ground out at the bottom of many of the hills, both
on the way up and down.
<snip> >> The towbar did ground out at the bottom of many of the hills, both
Aww, berk, are you jealous (as well as being too stupid to snip)?
1) It was a 'fun' closed course  for people of all skill and
experience levels (inc none, so you could also have had a go if you
2) You were invited to 'run what you brung' ... and the only exception
was the (presumably joke?) sign at the gate saying 'No Freelanders'.
3) Several vehicles had to get recovered because they got stuck
somewhere or broke stuff (holding everyone up).
4) BIL did a good job for his first time, even impressing a couple of
the marshals on the more complex bits (and given the limitations of
5) He got a good cheer from the audience on the final water splash
(and that was the point / goal).
6) On the second (of two) lap I managed to also get some video from
the outside so he could enjoy seeing all the axle articulation and a
feel for the angle of the assents / descents.
A good day out enjoyed by all. ;-)
Cheers, T i m
 But you knew that eh?
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