Fuel in the gear box.
Turbo Mini Forums

Hi just had my standard metro turbo engine stripped and the gear box was full of petrol any ideas why.
Thanks chaps.

Could be any number of things.

Maybe something in the carb is stuck open allowing fuel to flow down the manifold, into the cylinder and down past the piston rings into the sump.

what pump are you using ??
if you are using the standard mini pump bolted on to the the back of the engine maybe ??

the seals have gone on it dumping all the fuel into the gearbox

Hi benross I've got a metro turbo fuel pump from minispares bolted to the rear subframe.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Well I was driving it when lost oil pressure so stopped checked a few things and decided to strip the engine and check inside for clues only clue was petrol in the gear box ime assuming the petrol mixed with the oil has caused me to lose pressure just after reasons why you would get petrol in the gear box and I will check and replace as necessary.

Massive overfuelling, excess fuel has made its way past the rings, mixed with the oil in the sump, so you probably had about 2 gallon of oily petrol mix.

one here tom is the float bowl valve is not set right, also stuck open causing this ........................you are advised to check this first ! and then look at the over fueling issue,

i highly recomend you get and install a AEM LAMBDA gauge pronto!
these have come down in price mass so shop around

Hi thanks for the help really appreciate it how would pipe or wire s lambda gauge in then had a look on he'llbay and they ate pretty expensive would I really benefit from having one

Your pistons rings would need to be in a very dire condition to allow masses of fuel into the sump.

And then for that sort of quantity of fuel to get into the sump and not burnt there would have to be pretty major symptoms of a running problem.

It would simply be impossible for the engine to have been running fine and fuel to get into the sump via the rings.

So I cant simply believe you were just driving it and suddenly this occurred, with no other signs of a problem beforehand.

So again...what lead up to this ?

Widebands are not expensive. And if you can understand what they are telling you, then they can be vital.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

i helped lee get the car ready to go to the rollers and it wasent overfueling that bad to the point of it passing the rings. When he left fo the rr it was running well. Im baffled of how it got there or was gettin there?

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Hi as Eden said he helped me get it ready and it seemed to run fine no major issues really it's a strange one I will keep updating as and when it gets fixed thanks guys really appreciate you're advice on this.

head gasket failed? pushing fuel into the oil under load?

Could be sabotage if you have recently pissed someone off ?.

Here's a more important question.

Before you took it apart. What was the level on the dipstick ?

if fluid has come from an external source, then there would have to be substantially more fluid in the sump, than the original 5litres or so of oil that you originally put in.

Or was there the normal 5 litres or so ? If that's the case. What oil was it, where did it come from, how long was it in there ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

That's a good point the oil level was abit high once I ran the engine but I definitely put it dead on when I filled it up to start with. The oil was the green stuff from Halfords in the tin brand new bought only a couple of weeks ago.

So you are sure it isnt some strange oil smell, and is in fact petrol.

Still cant see how fuel could get into the cylinders and run down the bore, without some major obvious running problems at some point.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

id go with float level to high and drawing neat fuel from the float chamber via balance pipe/mid range lean pipe thingy

http://www.fishfight.net/

Ok guys thanks for all the help really appreciate it just waiting now to find out why fuels getting in there I will let u all know what it turns out to be thanks again guys..
Lee...

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

what about having the carb plumbed incorrectly so that on boost, fuel is pushed out the float bowl, down the breather straight into the sump?

I cant remember what pipes are where on a HIF44, but there is the lean off pipe thingamy