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[ScottieMV6]

Finally finished the headgasket work on my car today and started her up only to find it has made absolutely no difference whatsoever.

For those that don't remember the original problems were clouds of white smoke and misfire. Compression test showed 15 bar on all cylinders with the exception of no. 6 which showed 19 bar. Took the heads off to find this

which pretty much confirmed head gasket was the problem.

I have replaced both head gaskets, stem oil seals etc and put everything back together after making sure everything was spotlessly clean and I still have clouds of white smoke and a misfire. I have only left it running 5 mins but the smoke started after about 2 or 3 mins and then just got worse.

Any suggestions? :-/ :-/

[guncharmer]

I would be suspecting the cylinder head or heads themselves,did you have them skimmed or tested.

[Abiton]

Couldn't this just be a load of condensed coolant within the exhaust system from when it was last running with the fault,  evaporating off?

[alank46]

Hi
White smoke (if it really was white smoke) is usually caused by brake fluid sucked into the inlet manifold from the servo.  It gets in the servo from a leak in the master cyl.  Is your brake fluid going down.

Or as suggested above its condensation in the exhaust.  I started up one of my cars that had lain idle for a while and filled up the courtyard we live in with white smoke/steam, you could hardly see across the courtyard.  I was ordered to shut it off by SWMBO.  It was only condensation.
Alan

Finally finished the headgasket work on my car today and started her up only to find it has made absolutely no difference whatsoever.

For those that don't remember the original problems were clouds of white smoke and misfire. Compression test showed 15 bar on all cylinders with the exception of no. 6 which showed 19 bar. Took the heads off to find this

which pretty much confirmed head gasket was the problem.

I have replaced both head gaskets, stem oil seals etc and put everything back together after making sure everything was spotlessly clean and I still have clouds of white smoke and a misfire. I have only left it running 5 mins but the smoke started after about 2 or 3 mins and then just got worse.

Any suggestions? :-/ :-/

[Kevin Wood]

Well, judging by the state of the head gaskets you haven't wasted your time.

The need for skimming and porosity of heads is very rare on this engine. Not impossible, of course, but for the symptoms to be totally unchanged I think a bit of detective work is required.

Removing and blocking the feed to the master cylinder and giving it a run will eliminate brake fluid.

Then on to the misfire. If the compressions are good no cylinder should be misfiring so plugs, leads, coil pack and, perhaps, fuel injectors come under scrutiny. Did all the leads go back on in the right places? Any excessively wet plugs after a few minutes running?

Any trouble codes from the ECU? All connections back where they should be following the rebuild?

Don't give up after all this work. It must be something simple now.

Kevin

[Bent valve]

Is this the car that had the corroded heads?

[Darth Loo-knee]

Are you sure you put everything back right?

[Marks DTM Calib]

Plus leads fitted to the dis correctly?

[ScottieMV6]

I would be suspecting the cylinder head or heads themselves,did you have them skimmed or tested.

That was my first thought and if so I need to think about whether I can justify the expense or whether I should just break it and get another one?

Couldn't this just be a load of condensed coolant within the exhaust system from when it was last running with the fault,  evaporating off?

I would say that there was far too much smoke for it to be this

Removing and blocking the feed to the master cylinder and giving it a run will eliminate brake fluid

Assume I would have to block off both the end of the servo pipe and the resulting hole in the plenum so that the vacuum pipes still work?

Then on to the misfire. If the compressions are good no cylinder should be misfiring so plugs, leads, coil pack and, perhaps, fuel injectors come under scrutiny. Did all the leads go back on in the right places? Any excessively wet plugs after a few minutes running?

Any trouble codes from the ECU? All connections back where they should be following the rebuild?

I will need to double check all of this starting with compressions. I am fairly sure all the leads went back in the right place though

Is this the car that had the corroded heads?

Yes it is. What is your thinking?

[Andy H]

Auto-box breather connected to plenum by mistake?

After a rebuild it is quite normal for oil and grease used during assembly to burn off or get burnt in the engine. It only takes a few drops of oil to create a smoke screen.

There is a chance that the advice that experienced OOFers gave you about the corrosion, from photographs, would have been different if they had been able to see the heads in the metal but the photographs I saw didn't have any corrosion damage in the critical areas.

HTH

[Andy H]

Assume I would have to block off both the end of the servo pipe and the resulting hole in the plenum so that the vacuum pipes still work?

For a quick check it doesn't really matter if the heater and multi-ram flaps don't work so I would just undo the nut at the plenum and plug the hole with anything that fits.

[ScottieMV6]

Auto-box breather connected to plenum by mistake?

After a rebuild it is quite normal for oil and grease used during assembly to burn off or get burnt in the engine. It only takes a few drops of oil to create a smoke screen.

There is a chance that the advice that experienced OOFers gave you about the corrosion, from photographs, would have been different if they had been able to see the heads in the metal but the photographs I saw didn't have any corrosion damage in the critical areas.

HTH

Manual box so not that! Grease etc being burnt off as you say is normal but it is definitely not that.

I think I might go and take a video of the smoke to give a better idea

[ScottieMV6]

Hopefully these videos might help confirm the symptoms.

This first one was taken immediately after start up
[media]http://www.youtube.com/watch?v=FUmcbqp6J6Y[/media]

This second one was taken about 2 minutes after the first one
[media]http://www.youtube.com/watch?v=6517id5nj7g[/media]

What I find interesting is the smoke only comes out of 1 side of the exhaust :-/

In between the 2 videos I did a paperclip test and the only code was 46 which the car had before all this work so is not a major concern right now.

[ferrari jason]

cant tell from video but looks like condensation is the smoke vanishing soon after if so its just the moisture in the exhaust from when the gasket went . If you look at the 2nd video one of the tailpipes is clear and seems to be pumping out normal gases i`d say 90% that its just water vapour fingers crossed

[Kaycee]

Hope i am wrong Scottie but that first video looks like oil smoke the second looks like condensation  get it up to temperature and see if it still same could just be old oil etc lying around in the manifold etc
good luck mate