KSA-Cossie

iTrader: (4)

Just thinking out loud ?

boXXer

you mean 0psi? about 1 second i would imagine before it knocks the bearings out. although it would still run for a bit

Chip

iTrader: (3)

I would say a LOT longer than you think if you mean a basic engine (ie not some turbo nutter bastard thing), ie minutes at least that it would still actually run, potentially even hours.

BUT the damage would be done in a matter of seconds that would then kill the engine even if you got pressure back.

boXXer

as chip said...

KSA-Cossie

iTrader: (4)

I remember reading an old fast ford iirc where thieves stole a s1 and drained the oil then 7 miles later it siezed.

KSA-Cossie

iTrader: (4)

But it would fuck the shells in seconds though ?

CossieRich

iTrader: (1)

Lets put it this way, from memory the oil light on the dash of a cossie comes on a 5psi of oil pressure. IF you see that light when driving its already too late.

Chip

iTrader: (3)

God yeah, the shells would grip the crank in no time at all without oil to lubricate them, at this point they would start spinning in the rods (and mains not long after)

This would fuck the rods, bearings, block, crank


Its BAD news if you have no oil pressure under load for more than a couple of seconds (its not instant as the oil is still on the crank at the time the pressure stops).

xr2i-carl

why did they steal it then drain the oil? seems a bid daft?!

KSA-Cossie

iTrader: (4)

Thought that myself.

Chip

iTrader: (3)

Possibly to see what would happen, or possibly they drained it by whacking the sump on something, thats how I last drained my oil without meaning to on a car!

xr2i-carl

Just the way it was worded, as if they did it deliberately?!

Sod wacking it, surely you would check first after thumping the underneath so hard

Chip

iTrader: (3)

In my case I did check, and had cracked the sump, so I turned it off BEFORE it lost oil pressure, as I cared about the car.

In the case of a stolen car though, why would they care?

xr2i-carl

To make money out of the car they just stolen?

Once the oil light has flashed on the damage indeed has been done, but surely the car if stopped and shut down immediately and the problem rectified the engine should still see many many more miles???

dojj

iTrader: (3)

FROM PERSONALL EXPERIENCE!!!!!

my car did approxamatly 55 miles with absolutly 0 oil pressures as the bolt came off the cog which supplied the drive to the oil pump on the 24V lump

and that was pootling about

the crank was survived this ordeal but most of the bearings were fubar, so i'm glad i didn't drive it up the motorway

all the while i was thinking that i hadn't connected the oil pressure gauge up correctly

Chip

iTrader: (3)

PMSL @ Driving around with the gauge on 0 thinking the gauge was wrong

Benni

Did you do much damage? Or did you notice instantly?

Benni.

Chip

iTrader: (3)

I did no damage at all, as I turned the engine off before any significant amount of oil had leaked through the crack, so the oil pickup pipe never say any air while the engine was running.

Benni

Nice one.

PGT

mine idled and drove in and out the garage several times with zilcho oil pressure and there were no marks of any kind on the bearings/crank

Lloyd

central group at santapod have done a blow up a banger for the last few years,ie old metro,drain the oil,full revs,and guess how long it lasts,after 9 seconds it threw a rod out the block.

Chip

iTrader: (3)

Its if you start putting them under load you are really guarenteed problems more or less, Im surprised you had NO marks though even still.

toff

iTrader: (1)

My first engine blow up, was so pissed off a kept it going for about 2 miles till it would'nt go any further. welded the shells to the crank and just about every nut and bolt in the bottom end was fucked .

KSA-Cossie

iTrader: (4)

Proper job toff.

toff

iTrader: (1)

Aye man, 3 days after upgrading to stage 3

Fudgey

iTrader: (4)

when we got rid of the drift shitter i had the engine running up to temp, and after several big handfulls of gravel down the inlet it started to run a bit rough, so i drained the water and oil, it ran for a good 10 mins at part throttle before it siezed lol

i was hoping for a more spectacular scenario, but it just stopped lol

polly_x

iTrader: (2)

Bit more thinking out loud then. What would be a sensible level to set a oil pressure warning light too on a YB then?

Stu

SteveB

iTrader: (3)

On an old 1.3SR Nova years ago I managed 7-8 miles with no oil pressure until 1 of the conrods snapped

Chip

iTrader: (3)

20psi, anything less than that and it will come on at idle.

Deleted by Request

..its actually 15psi.

col cos1

iTrader: (5)

i done 120 miles on a newly built engine and it popped a half moon seal(oil everywhere),fixed that and noticed the oil pressure light flicker(they come on at 6)looked at gauge and was 5-6,was truelly gutted,drove to the garage,stripped it and swarf in the oil,crank was fine,new shells,pump and drive and its been fine this time

polly_x

iTrader: (2)

Cheers Chip. Just trying to find a sensible alarm level on the AIM dash.

dojj

iTrader: (3)

why not just run a raffle at this years ford fair to see how long an engine will run before it seises when you rev the nuts off ot it with no oil

just like they used to do at the middx owners club show a few years back

a fiesta lasted more than 2 minutes

Butch.

iTrader: (1)

not long.............