Replacing timing belt turns to cylinderhead overhaul; problem not solved

16th July 2023, 20:20

Hi all,

Me and my mate were planning to replace the timing belt, but it turned into something different

This is from a Citroen Saxo 1.4 from 2000.
So we changed the belt and after we put everything on again we discovered this problem.
Underpressure in the carter. This noise occures after driving a few kilometers. When taking a right turn it disappeares. But if you drive on the noise continues anyway.

So checking what we did wrong, we noticed a difference in timing.

We had placed a 8mm drill in the camshaftswheel-hole and a 3mm drill in the flywheel. But apparently, we took the wrong hole!
As to be seen in this image: https://ibb.co/0F0qkXf
There are 2 holes in the flywheel. The one arrowed with red is the wrong (3,5-4mm) hole. We needed the green hole (6mm).

Concluding this would be a tough mistake we took off the cylinderhead. This showed us the timing was a littlebit off https://ibb.co/ygLT0VX
As a result, the pistons would have hit the valves. So the cylinderhead was taken to an engineer for an overhaul.

With an open cylinderhead it is stated to NOT crank the crankshaft because the engine has wet cylinder liners: 12.01: youtube(1) or 12.52 youtube (2)

We made a structure for holding the wetliners in place https://ibb.co/k80tTRb
Turned the crankshaft, cleaned the surface https://ibb.co/VY5F8Vh
Installed the cylinderhead, camshaft (this time with a proper 10mm bolt for timing!). Took it for a test ride and the same problem. After a few kilometers it starts whining again video

Who has an idea!? Who can help out?

18th July 2023, 02:00

Clamps look good.

There's no obvious damage.

Put new head gasket on, and cylinder head. Time it up using the correct pins and you're good to go.

Not sure what your noise is, I have no access to the file. But if it sounds like a ticking which is intermittent when turning (sounds like bottom end) on my car when it did this, the plastic timing belt cover was just touching the crankshaft pulley ever so slightly.

19th July 2023, 16:42

Quote:

Originally Posted by MartinObviously

Clamps look good.

There's no obvious damage.

Put new head gasket on, and cylinder head. Time it up using the correct pins and you're good to go.

Not sure what your noise is, I have no access to the file. But if it sounds like a ticking which is intermittent when turning (sounds like bottom end) on my car when it did this, the plastic timing belt cover was just touching the crankshaft pulley ever so slightly.

Hi! Exactly what i thought in the beginning. Like the belt was touching some cover of some sort.

Sorry didn't know the video's didnt work, here is a new upload:
https://www.youtube.com/shorts/cFnxIdIivps Before we changed the head with new valves and gasket.
But the same problem after we changed it: https://www.youtube.com/shorts/IqoGayInqT8

There's a very big vacuum in the valve cover.

23rd July 2023, 01:22

hahahaha that's so weird! lol

Umm, the rocker cover I would disconnect it from the intake manifold vacuum. So te rocker cover will only go to the air box.

Then blank the pipe on the intake.

I'm wondering if there's maybe meant to be a valve, but I don't remember any of mine having valves.

23rd July 2023, 16:36

You mean disconnecting tube B

https://ibb.co/yPqMMvQ
And cap both outputs? For intake manifold and down Tube B?

24th July 2023, 00:13

Quote:

Originally Posted by Klaasvaak

You mean disconnecting tube B

https://ibb.co/yPqMMvQ
And cap both outputs? For intake manifold and down Tube B?

Yes just cap the B connection you have marked.

And see what happens