Hi all

I'm about to have a go this evening at changing the thermostat body on Fabia 1.4 MPI (already posted several questions elsewhere about this and had loads of great help). It's been using a lot of fuel.

As I was giving the engine a little look a few mins ago, I checked the underside of the oil filler cap and noticed that there was a dark creamy residue. I wondered if this is the tell-tale 'mayonaise' people talk about? It wasn't paryicularly thick, and I have never noticed the problem all the times I've checked it before over the last few moths of high-fuel usage. The car was also in garage last week having the oil cap seen to because it didn't fit correctly on to the engine - so I'm hoping it's just got a bit wet while the mechanic was seeing to it, or perhaps he put a bit of grease on oil cap...

Anyway, if someone can show me a picture from somewhere on the internet showing what this 'mayonaise' looks like I'd be really grateful. I can then compare.

Also the car isn't using an awful lot of water - and on our last car the head went and that was using loads of fuel and the engine sounded terrible.

Cheers!

If the mayo is only in the oil and not in the water, then clean the may off you can see and take the car for a long drive to warm it up and run it when fully warmed up for half hour.

It's usually just condensation where the car has only been used for short journeys and not been able to properly warm up to drive the water out of the oil.

If it's still bad after that then I'd suggest you might need to do an oil flush and change.

If there is water/oil mayo in the coolant tank then you should get a head gasket gases test kit and see what the results say.

Hi

That is usually present on the cap if you do short journey`s

Not something to worry about staright away , unless like cheesy sadi if you have it in the expansion tank

The very early 1.4 8v`s did have issues with them , but alot of them got done in warranty

Sarah

The head gasket on my old MPi did go, and it ran fine like this, but it was using coolant a lot...

The parts were cheap, and the job was done in 2 days, inc. getting the head skimmed.

Just in case yours has gone, which it doesn't really sound like it has