Does steel Seal actually work? How to video on what they don't make clear on the bottle 

Thanks, happy Christmas to you too, The leafs ok, struggling atm with range during the winter. Deffo needs a bigger battery.

I worked for vauxhall when the veccie b and astra g where still in the showrooms....started to downhill after the vec c and astra h

GM were going broke so anything from 2005 - 2019 was rubbish. Now sold to to PSA / Peugeot Citroen

Thank you for your comments.

Exactly what I thought. Why would you take the cap off?

How do you determine which cylinder has the most compromised gasket?

@@jamesthomas4693 Many ways. Look at the spark plugs, look at the pistons. Could force air into cylinder with air compressor, and see if it makes the coolant level rise in the expansion tank. Could run the engine with one spark plug out at a time holding paper over open spark plug hole, this might make the paper wet. Also could fill the cooling system to the brim with cap off, put one spark plug in at a time and turn the engine over, see how badly it bubbles or even shoots liquids out the coolant fill hole. Or remove one spark plug at a time and run the engine looking for bubbling/splashing out of the fill hole.

Wouldn’t advise this, no.

Empty.. as it needs to go into the system.

I covered that in the video.

@@Roverturbo not really. You state you can’t use antifreeze but yes you can use the red antifreeze which is 50/50.

@MAH-tu1xz I never said that? I said…. It recommends you drain the system and use water first, then use blue antifreeze after.

Why are you asking me? I don’t know. Read the bottle, or go to their website.

Must have done something wrong, was the cooling system pressurized before the procedure? Was the leak severe, if so did you remove the plug from the worst cylinder to eliminate cylinder pressure? Thermostat removed? Heater core valve fully opened? Cooling system flushed several times before the procedure? Added correct amount of sealer taking cooling system capacity into account? Mixed the sealer with water before pouring it into the cooling system? Procedure done in several cycles raising the temperature some more every time or did you do it in one go?

Because common sense says not to, as if you have a pressuring system, it basically can’t if it’s not sealed. 👍

@@Roverturbo That's why it didn't work. It has to be forced into the head gasket.

Cylinder pressures are greater then coolant.

@@Roverturbo When you shut off the engine then the coolant has more pressure than the cylinder. There are also some comments saying that you are supposed to take out the spark plug and unplug the injector and run the car and then shut it off.

I'm censored by YT. All of my comments disappear after you initially read them.

Which diesel, skeptical after seeing this have a water leak at bottom of the injector port, 2005 sprinter

@@lauriefairbairn128 Vauxhalls 1.3 and 1.7