Daewoo nexia poor running

Honest John Back Room » Technical matters
View Threaded
Fri 16 Mar 2007 09:22
Daewoo nexia poor running - horatio
It idles and runs on 3 cylinders, removing No.1 spark plug lead makes very little difference, (other 3 significant difference).

Removing all plugs 3 white & clean, No.1 a coppery colour but otherwise clean.
Compression is 12bar on all cylinders

No.1 has a good spark, and changing the lead did nothing.

I suspect the injector - Am I right?

Also the water is going down, and on removing the oil cap, the oil has a creamy scum appearance on the top.
My diagnosis head gasket gone between oil and coolant - but not into the piston - (yet)

I would say they are two seperate faults, one requiring injector cleaner/new injector the other requiring new head gasket.

Am I right or could the bad running be related to the oil problem?
Reply | Report as offensive | Link
Fri 16 Mar 2007 09:34
Daewoo nexia poor running - Collos25
The injecter could be clogged up due to the HG problem either way the head has to come off.
Reply | Report as offensive | Link
Fri 16 Mar 2007 09:38
Daewoo nexia poor running - George Porge
Take the plugs out and use a torch to look at the tops of the pistons, if the top of the piston on No.1 is clean and has no carbon build up the HG has blown to the cylinder.

If oil and water are mixing then the engine will be damaged if you continue to run it due to poor lubrication
Reply | Report as offensive | Link

Our honest used car pricing is a little bit different to all the others. You can get to our values through make or model - you don’t have to follow a prescribed route. Plus, it’s live, which means we can react to changes in the market quicker than any printed price guide.

Honest Used Car Prices

A guide to how much VED you will need to pay on your car.

Road Tax Bands and Rates