Technology0 min ago
Petrol into a diesel car
No best answer has yet been selected by hcockerill. Once a best answer has been selected, it will be shown here.For more on marking an answer as the "Best Answer", please visit our FAQ.
Hi, first question is did you run the engine after filling up? if you did and its an older car 180 is not bad because it will involve draining all the fuel system inc the pump and fuel lines etc....etc.... and if the fuel system is not damaged then you got off lightly.
If you ran it and its a newish car be prepared for a very expensive shock.
Obviously if you knew how to drain the tank yourself you would not ask this question so I suppose you will just have to get a garage to do it for you.
you can syphon it yourself with a tube. just suck the end till it starts coming up the tube and come out.
to get the dregs you could put rags in to soak it up. My friend used a hoover once. was messy and hard to clean afterwards though, but they managed it - cheaper than �180. If you try the hoover thing put the paper bag into a plastic bag inside the machine - it gets soggy. and gaffer tape a piece of hose to the nozzle to get all round the tank
i'm not sure if this could be dangerous though !!!!!!
Just a few pointers. If you have a cat exhaust unburnt fuel of whichever type will damage the cat. It is almost impossible nowadays to syphon fuel out of the tank.
If you have not run the engine you have the option of disconnecting the fuel feed after the pump, put the outlet pipe into a (big) container, switch on the ignition and let the pump do the work until the tank is empty. Put some diesel in your tank and turn the engine over till it starts.
Howver, I wouldn't recommend this as a garage would also (hopefully) bleed your injectors/pipes and/or turbo to remove the last of the petrol.
lots of PET bottles/jerry cans etc
two 4 or 6-pint milk cartons with the side cut out.
17mm open ended spanner
lift the bonnet, locate the fuel filter ( the corner of the engine cmpt nearest steering wheel)
slide back a white clip holding a black hose on
go underneath the car and slide a similar white clip holding a plastic pipe. Petrol should flow into tour milk carton. when full swap cartons and decant fuel into bottles.
ONE HOUR LATER
when the fuel has drained, put diesel in this time and pour about 1/2 pint down the fuel filter pipe.
slacken an injector nut with 17mm spanner and crank engine over. this bleeds the air out of the system. keep cranking until it starts - you may need jump leads for this.
Good luck and congrats, youve saved �150
Basically filled the ENTIRE tank with unleaded, started the engine and got as far as the next pump before it cut out. Not sure why it did that as there was still plenty of diesel in the tank - fuel light had only just come on (apparently the diesel stays sitting at the bottom because it's heavier). This turned out to be lucky.
Fortunately my breakdown cover got the car transferred to the dealer for free so then it's a question of whether I get them or a third party to fix it. Started looking into costs by Googling on my phone (found this thread) and was shocked by the potential cost of repair (e.g. �2,000+++).
Spoke to a mate in the know. If I hadn't turned the engine over at all, the official dealer would have charged me about �200 to drain the fuel, flush the system and change the filter, which is reasonable. But because I did turn the engine, they would be able to tell the engine had been compromised. They would tell this after draining the fuel, and would go on to charge for replacing all the parts involved in the fuel system as well. Bottom line is that once the dealer has it in their garage and prove the engine is 'damaged' they have you over a barrel.
Three reasons why I didn't have this problem:
- The car didn't get very far (AA bloke said it was tantamount to not having started it)
- It's petrol in a diesel (not so bad)
- There was a decent bit of diesel left in the tank (so it may not have been pure petrol that got pumped through).
So instead I got quoted �170 by the AA to tow the car out of the dealership and perform the draining procedure. It worked. I think I got off lightly considering what could have happened.
Do not turn on the ignition or start the car
If the car's still under warranty check with the franchised dealer regarding their advice and correct remedial action – running with even a small amount of petrol in the tank might invalidate the warranty. Some manufacturers advise that you should get seals and filters renewed even if the engine has not been run.
Generally a small amount of incorrect fuel should not damage the engine as long as you have not started the car and top up fully with diesel.
If you've added more than 5 litres of petrol – Drain the tank and refill with diesel
If you've added less than 5 litres of petrol – Top up with diesel and run normally unless the manufacturer has advised otherwise
Diesel in Petrol
Do not turn on the ignition or start the car
This is less common because the standard diesel nozzle is bigger than the filler neck on modern petrol cars – you have to be pretty determined and patient to misfuel with diesel.
If the car is still under warranty check with the franchised dealer regarding their advice and the correct remedial action.
Generally a small amount of incorrect fuel should not damage the engine as long as you have not started the car top up fully with petrol.
If you've added more than 5 litres of diesel – Get the tank drained and don't run the engine.
If you've added less than 5 litres of diesel – the tank can be topped up with petrol and the car run normally unless the manufacturer has advised otherwise