C3G engine head removal - Twingo 95

[cooldriver]

Water can cause a short circuit under the fuse box!

Did you clean the holes from the stress bolts ?
They could be filled with water or something like that...
And this procedure done :
Oil bolts, 20 Nm, 90 degrees, loosen, and same again ??
Would agree, there is a leakage between cylinder liners and gasket.

[ronenfe]

Thanks. Yes. I did tightened it exactly like that.

[cooldriver]

Did you open the bleeding screw on the thick tube near the water pump ?
Knead this tube when filling up the coolant till it rinse out . This is very effective by the way.

Other thing is, Renault fixes the cylinder liners with special tools,
the gasket must not be removed once installed ! Die hard project.

[ronenfe]

Yes. Did it from the bleed screws before I started the engine.

[cooldriver]

Thermostat opens so the cooler heats up ?
I think you are done with it .

[ronenfe]

Yes. Hose starts to get hot after a while.

[ronenfe]

Ok. I think I found the problem.
The sleeves of cylinders 2,3 are not all the way in, an? I thought the pressing of the head will press them down.
When I first turned the crank by hand, the sleeves were pushed out with the Pistons so I had to press them down by force, I didnt press more and thought the head will press it. Should I press it now with a mallet?

[ronenfe]

Ok. I think I found the problem.
The sleeves of cylinders 2,3 are not all the way in, an? I thought the pressing of the head will press them down.
When I first turned the crank by hand, the sleeves were pushed out with the Pistons so I had to press them down by force, I didnt press more and thought the head will press it. Should I press it now with a mallet?

[Broadcasttechniker]

Did you replace all 4 cylinderfoot gaskets?
You have to do that when the cylinders were mooved inadvertently.
I once had to do that in my sisters R4.

[ronenfe]

Unfortunately not. Do I have to remove the oil pan now? Can it be done without removing the engine? Any tutorial?

[Broadcasttechniker]

Yes you have to.

But, please check first what happened to the O-rings. Page 57 of 103 MR-C manual.
The engine of the R4 had the Excelnyl gaskets an I choose the thickest one without measuring.
With the O-rings you should not have a problem, exept when the O-ring has split and now sits between cylinder and motor housing.
Please also read and check what is written obout the cylinder protusion.


You have to open all big ends. Make shure you don't mix the parts up.
A pain in the ass. With the R4 you had to remove a stabilizing bar (not the stabilzer) between the longitudinal chassis beams.
But I think with the C3g thats easier.
I don't know whether we mentioned this page before http://www.mbarak.de/twingo/rep-insp/ZKD/ZKD.htm
Do a Google translation.

[ronenfe]

I only have 2 liners moving. Why do I have to remove all big ends? I thought about removing pistons 2 and 3 from above and then the liners from above and fix the o rings and put the liners from above.
There is this good video which can help.
https://youtu.be/q44FPd72xmc
Thanks a lot for the help Broadcasttechniker.

[Broadcasttechniker]

You only have to remove the big ends of the cylinders in question.
In my case I had to remove them all because i didn't know how thin or thick the old gaskets were.

Besides.
If there is no water in the oilsump, the O-rings will be o.K.
So dont do anything that is unnecessary

With the R4 of my sister there were no compression problems but water in the oil.

[ronenfe]

You only have to remove the big ends of the cylinders in question.
In my case I had to remove them all because i didn't know how thin or thick the old gaskets were.

Besides.
If there is no water in the oilsump, the O-rings will be o.K.
So dont do anything that is unnecessary

With the R4 of my sister there were no compression problems but water in the oil.

I only need to push the liners a little downwards, Can't I just pull them up and try to push them down without removing the oil pan?

[Broadcasttechniker]

You can do that, but that won't remove a broken O-ring nor would that replace ist with a new one.
I agree with you if you do not want to remove the oil pan without a reason.
Check why it is not possible to push the liners right down to the block.
Is the feeling springy or solid when you try to do that?