General Imola Blue -- Ooops! WE NEED UPDATES!!

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General Imola Blue -- Ooops! WE NEED UPDATES!!

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There I was toying with a 7 series BMW on the A5. Pass it at 110, come to a hill, ask for more and there's a little "phut" and no more power, ease off the gas and oil streams through the bonnet vent onto the windscreen, pull up asap. Small oil fire under the bonnet soon goes out. Look under bonnet and oil filler cap has blown off. Replace it and as soon as the engine tries to fire it blows off again.

Call RAC, and wait for tow truck while sitting in BMW eating mince pies and watching telly.

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If I'm very lucky, it's just the head gasket. Otherwise, likely to be a holed piston.(n)
 
Re: Imola Blue -- Ooops!

Your engine's lunched dear boy.

N/A for me! And it'll pull over an indicated 120 all day. I learnt with my 5 turbo. You can rag a turbo'd lump from point to point in town. But full-on on a M-Way is a no no. Spesh as the engine was orig N/A.

Good luck. If you're lucky and it's a piston you can prob drop sump pull head and swap in situ.

Keep us posted! (I smashed a wheel xmas eve so we're all fubar's at the 'mo)!!
 
Re: Imola Blue -- Ooops!

lean, that's what caused it together with det. Proper mission to sort. A moments silence if you please I wish that on no man..


them pistons aint cheap.

wonder what caused it.. it shouldn't have done that!
 
Re: Imola Blue -- Ooops!

Valve dropped causes running on three. MAYBE it can hole a piston but rare. Usually makes a mess of the crown and head. Lean/Pinking/det causes hotspots. With the amount of blowby to cause oil cap to launch and spew oil it's massive crankcase pressure.

My money go's on holed overheated alloy piston. You drive balls out on the motorway and this usually happens. I've seen it too many times on 5GTT's vmaxing at 135 in 5th. The fuelings out.

Engine's not dead. Just needs fettlng!
 
Re: Imola Blue -- Ooops!

That much oil doesn't look like headgasket to me, that needs failed rings or a holed piston to pump it up out of the sump and exit via the oil filler. I hope I'm wrong, but I predict a significant engine rebuild in your future.

What spec is this engine? Skimmed Fiat pistons, compression plate or has it had pistons in its life already?

Commiserations

Peter
 
Re: Imola Blue -- Ooops!

oops a daisy.how were the temps/pressures? or didnt you notice

All was fine -- at phut time I didn't really have time to do more than glance, but nothing seemed out of the ordinary. There were no horrible noises as I pulled up or even as I tried to re-start, so I'm inclined to think it isn't a valve. The car had been used hard that day, albeit I'd not run it that fast in top, and had run a sustained 115 or so on the M6 the day before without a problem.

You've got to be philosophical about all this -- essentially it's a well put together stock motor with machined pistons, putting out more than twice the original power. Sooner or later something will give. When it gives, you look at ways of improving it, and so it goes. ;)
 
Re: Imola Blue -- Ooops!

Indeed. Please keep us posted. Onwards and upwards!
 
Re: Imola Blue -- Ooops!

Oh no its a sorry sight :(

It does puzzle me tho, that car was setup only a month or so ago theres no way it could be lean.:confused:

I hope you fix it soon, get the beast up and running again!:devil:
 
Re: Imola Blue -- Ooops!

Oh no its a sorry sight :(

It does puzzle me tho, that car was setup only a month or so ago theres no way it could be lean.:confused:

I hope you fix it soon, get the beast up and running again!:devil:

Yeah, it's sad. My Emma loves the car too.

Still, all will be revealed on pulling the head. I'm guessing detonation eating piston, but I doubt it's a simple lean condition. Problem is, a turbo engine is always running at the edge under high loads and full boost, and it takes very little to tip it over.
 
Re: Imola Blue -- Ooops!

could've been a sensor / ecu / fueling glitch i guess, just a brief one would be enough to upset it :(

it wasn't low on fuel when this happened was it? :(
 
Re: Imola Blue -- Ooops!

clutching at straws.. really. keep us updated when you pull it to bits. shame the mf2 doesnt offer data logging, it might've given some indication of events just before things went.
 
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