cilinderkop vraag (Page 2/3)
82-T/A [At Work] MAY 22, 11:16 AM

quote
Originally posted by Yor61:

There is a alu tube between the valve cover and carburator. What is the function of that?



Sorry, I forgot to respond to this. The aluminum tube between the valve cover and the carburetor is for the "Positive Crankcase Ventilation." As the engine gets older, you may get some "blow by" in which gasses escape past the piston rings into the engine itself. If the engine was totally sealed off, it could blow out things like the oil pan gasket, etc... and cause leaks. So, they installed what's called a PCV (Positive Crankcase Ventilation" valve... which should look something like this:



This prevents air from being sucked in there, but allows air to escape when there's pressure within the engine itself (like in oil galley, under the crankcase, etc.). The carburetor sucks it back in and then sends it back through the engine to get reburned... it also helps with emissions.
... also, another thing which I just thought to mention. When you spray brake cleaner at the intake... and the engine runs better, what that typically means in a more obvious sense is that you have a vacuum leak... which could also be from some of the vacuum lines too. But what it's scientifically meaning is that the engine is getting more air than fuel (which is because of the vacuum leak), and when you spray the brake cleaner... you're adding back some of the "fuel" it needs along with reducing some of the air. It explains why it starts to run better.

Yor61 MAY 22, 01:32 PM
Thank you very much for youre nice reply. Say hello to the dutchman I'm from The Haque.

I mounted the gasket without any gasket pasta so there is maybe a reason for leakage.

When i came from work this afternoon (because when the car drives it rides lovely) i took the carburator and the whole manifold from the engine.

It is very diffucult to see if the gasket is been leaking to be honest. Carburator gaskets are allright i think and the EGR bracket gasket looked ? ok.

Tomorrow i buy proper gasket pasta and put everything back on and then it has to be ok i think.
Patrick MAY 22, 05:24 PM

quote
Originally posted by 82-T/A [At Work]:

CLICK FOR FULL SIZE


That image is quite helpful, as it rules out those Nothing "holes" in the center of the head as being some sort of open ports.


quote
Originally posted by Yor61:

Tomorrow i buy proper gasket pasta and put everything back on and then it has to be ok i think.



"Gasket pasta". I love that. Sometimes Google Translate comes up with great terms.

But yeah, I suspect you simply have a vacuum leak somewhere, and hopefully an application of Permatex Aviation Pasta® (or equivalent) to the gasket surfaces will resolve the issue.

[This message has been edited by Patrick (edited 05-22-2024).]

82-T/A [At Work] MAY 22, 07:36 PM

quote
Originally posted by Yor61:

Thank you very much for youre nice reply. Say hello to the dutchman I'm from The Haque.

I mounted the gasket without any gasket pasta so there is maybe a reason for leakage.




No problem man, best of luck, and don't be a stranger on here when you fix it.



quote
Originally posted by Patrick:

That image is quite helpful, as it rules out those Nothing "holes" in the center of the head as being some sort of open ports.



Patrick, did you see what I did? I totally screwed it up. I put "exhaust," but those sure as hell aren't exhaust ports. They're intake ports... and really the two nothing ports on the left and right are open to the crank case (you can see at least two pushrods in there). The nothing in the middle is still right, but I got everything else wrong... haha... and I forgot to label the cooling port, even though I have a blue line. I was doing it while I was in a meeting, so I wasn't giving it my best. I'll fix them and swap out the images.
Patrick MAY 22, 07:45 PM

quote
Originally posted by 82-T/A [At Work]:

Patrick, did you see what I did? I totally screwed it up.



Heh heh, I was totally focused on the EGR ports and it didn't even register.


quote
Originally posted by 82-T/A [At Work]:

I'll fix them and swap out the images.



Good idea. You don't want to totally confuse the OP (and any future readers of this thread).
82-T/A [At Work] MAY 22, 07:46 PM
Ok, fixed the images and removed the old ones, before anyone notices... haha...
Patrick MAY 22, 08:00 PM

quote
Originally posted by 82-T/A [At Work]:

Ok, fixed the images and removed the old ones, before anyone notices... haha...



I went back and exchanged the image of yours that I had copied Here for the correctly labelled image. The evidence has all now been nuked.
Yor61 MAY 29, 04:46 AM
Hello forum guys,

I felt an obligation to make myself heard again partly because I am still not satisfied despite what I have done!

Namely: long story short, complete engine overhaul (cylinders were past the max tolerance) and gas built in! Cilinderhead is prepared for riding on gas.
Starting on gas (cold specially and when it’s cooled down for a couple of minutes) is not easy. Gas piece is mounted on top of the carburettor. Gas is system is checked and adjusted.
On gasoline, the car stops (drops dead) when driving away. Ignition is a little later because of driving on gas. Maybe this is something.

Vacuum system cut off incl EGR valve. If the car drives, both on gas and petrol, the car drives ok. The rochester carb is a dragon of a carburettor.

Anyone with experience and/or ideas?

Thanks in advance
Roy
Patrick MAY 29, 05:07 AM

Roy, welcome back. Just to clarify... when you say "gas", are you referring to natural gas (or propane)? Here in North America, we use the term "gas" as an abbreviation for gasoline.
Yor61 MAY 29, 06:31 AM
Hello Patrick, how are you.

Gas I mean LPG, sorry.