Antara advise on piston

[Djbarber]

Just after some advice on a 2 litre Opel antara 09 plate. My other half accidentally put petrol into diesel. Ran it then blew like a head gasket would. After getting the head off I discovered number 3&4 injectors and glow plus were damaged and so was no 3 piston / cylinder. The piston has blowout and cylinder has scoring in relation to where the piston had burnt. My questions are can pistons be taken out with engine in situ? Does all pistons have to be replaced or just the damaged one? Does the scoring need a rebore or is there a way of getting round it by other means of fixing? I have pictures but any advice would be appreciated

[GreenV8S]

Djbarber said:

Does the scoring need a rebore or is there a way of getting round it

It depends how bad it is.

I don't know whether you could replace the liner on that engine, but if not then since you would be replacing the piston in any case, you'd need to at least hone the bore in any case which would mean stripping the block.

On most engines the pistons can be taken out from the top with the crank in situ after splitting the big end.

Have you checked what other damage has been done? You'll certainly need to replace all the fuel lines and filters, and it's probably destroyed the fuel pump and injectors. Running petrol through a diesel gets expensive fast.

[TooMany2cvs]

Djbarber said:

Just after some advice on a 2 litre Opel antara 09 plate. My other half accidentally put petrol into diesel. Ran it then blew like a head gasket would. After getting the head off I discovered number 3&4 injectors and glow plus were damaged and so was no 3 piston / cylinder. The piston has blowout and cylinder has scoring in relation to where the piston had burnt. My questions are can pistons be taken out with engine in situ? Does all pistons have to be replaced or just the damaged one? Does the scoring need a rebore or is there a way of getting round it by other means of fixing? I have pictures but any advice would be appreciated

Almost certainly the cheapest and easiest fix is to take the engine out and throw it away, then get a replacement.

But it's not a common engine in Europe - it's not the same as the Vectra/Insig, as you might expect, because it's a GM Korea (Daewoo, originally) product. At least being the 2.0, you can look at Chev Cruze/Daewoo Lacetti/Nubira, as well as other Antaras.

[Pinkie15]

TooMany2cvs said:

Almost certainly the cheapest and easiest fix is to take the engine out and throw it away, then get a replacement.

But it's not a common engine in Europe - it's not the same as the Vectra/Insig, as you might expect, because it's a GM Korea (Daewoo, originally) product. At least being the 2.0, you can look at Chev Cruze/Daewoo Lacetti/Nubira, as well as other Antaras.

Not forgetting the older Chevrolet Captiva.

If you do rebuild probably good idea to take the head apart and check the camshafts and guides, given these are a known weakness on this engine.

[stevieturbo]

Really...the fact you're asking these questions...you're probably in over your head already.

As others say, cut your losses and just replace the engine or find a reputable and trusted machine shop who can do the job correctly ( and those can be hard to find )

By trying to throw a lot of new parts at it without the correct experience of building engines.....you could end up spending a fortune and still have a lemon because of other major problems within the fuel system.