max69vk

Not sure if this has already been mentioned in this thread but I've just found out that there is a software (ECU) update that should be applied at the same time as the injector swap that deals with DPF & (I believe) cold start issues. 99% of dealer service depts aren't even aware of it so its well worht double checking it's been done.

If your oil level has raised since the injector swap then its almost certain the head is damaged either by them doing the swap or possibly damaged from the factory. These engines had a run of 'bad heads' over a series of years which lead to cracks & other damage in the cylinder head. In my case they reckon that the head was damaged from the factory (ovalled injector seating) & that over the years this 'oval' was blocked by the soot & carbon from the combustion in the cylinder to give a good seal on the injector until they rewmoved them for the swap, which then removed the build up & allowed the injector to start leaking diesel into the oil... Personally I think thats bull as the car would never have got through QC from the factory at any stage of manufacture if that was true, however, it did result in me getting an entire new cylinder head assembly & injectors fitted for free.

Injector seals have not been fitted correctly or they've done the head, have a read of my experiences here... http://www.audi-sport.net/vb/new-a3-s3-sportback-8p-chassis/155474-2-0-tdi-bnm-engine-sounding-rough-after-injector-swap.html

Hate to be the bearer of bad news but they've either faffed the injector seals of the cylinder head. Have a read of my experiences with Audi (same engine) here... http://www.audi-sport.net/vb/new-a3-s3-sportback-8p-chassis/155474-2-0-tdi-bnm-engine-sounding-rough-after-injector-swap.html

Basically any BMN (170) engine between 2005-2008 can be affected (pre CR engines), Im suprised Skoda are saying they havent heard of this as its a worldwide issue not just a UK one. The part number is pretty useless as all they did was add a 'B' suffix (or something like that) to the end of the original part number which can only be seen if you remove the injector unit itself. Usually you have to contact customer service & provide them with your VIN number & they'll tell you if the car has been fitted with the affected units.

Its well worth checking the fuel filter as it seems to indicate various potential component failures as well as cause various issues including cold start problems. As for your fuel filter housing, its fine, mine looks super rusty all over, & most look ropey after only a couple of years anyway. I actually managed to mishape the top lid while removing it to get to the filter which in turn lead to a leak, take your time & lever the lid slowly all the way round while pulling it upward to avoid damaging it.You wont damage the rubber seal as its not directly round the rim of the seal. The damage was easily rectified by putting the top back on the filter & going round the lid flange with a pair of mole grips to ensure the 2 parts of the lid & housing actually sat flat on one another, alternatively you can disconnect the hoses & take the lid off to visually check it & bend it into place, just make sure you fit the hoses back onto the right connections as the fuel feed & fuel return lines will easily fit onto each others connection & will cause kangarooing over 1500rpm as we discovered with my car :(

Well this is my first post here & while I don't drive a skoda ( I have an Audi A3 tdi 170) I stumbled across this thread while researching some info on various issues I'm having with my car, one of which being difficult starting which has now been solved. If you want a read of all the issues & problems that have been solved take a look at the thread below, hopefully its of some help http://www.audi-sport.net/vb/new-a3-s3-sportback-8p-chassis/155474-2-0-tdi-bnm-engine-sounding-rough-after-injector-swap.html