Replacing exhaust manifold gaskets on M103

[Rahulio1989300E]

Hello,

The exhaust manifold gasket on cylinder number 4 for my M103 cracked. i can see a black trail power on my cylinder head from it.

I have the gaskets already, I know the simliar 5 go on cylinders 1 to 5 and the last 3 holed gasket goes on cylinder number 6.

I will need to buy a torque wrench for this job...

So, I have 3 questions for you all.

1. What is the size of all the nuts? I need to replace all of them since there is some rust on each one.

2. At what ft/lbs should I torque them all to? The online service manual says 25Nm. What is the conversion? Is it 18.5 ft/lbs?

3. How do I go about doing this? Do I remove all nuts attaching the exhaust manifold to the cylinder head or do I have to remove more than that?

Thank You for your help