Cyl head gasket replacement on a Nissan Duke HR16 vvti engine 2015

Question edited to remove chaos :>D
Question moved to sub category.

https://www.google.com/search?q=2015+Mercedes+Benz+OM651+CDI+4+cyl+2.1+diesel%2C+cylinder+head+bolt+torque

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You will need to remove the cyl head and check for corrosion and/or cyl head gasket. Best is to take the cyl head to a reputable machine shop for testing and service.

For a 3.3/3.8 L

your need to have your radiator tested ,pressure tested and also see if you haven't blown cylinder head gaskets.

Well it would really depend on the condition of your engine.
It would take more labor to repair your engine than it would to just replace it. But unless the engine is very damaged it should be cheaper to have your engine fixed. And replacing the head gasket and having the head repaired should be under the price you were given. A head gasket set for a 4 cyl engine is around $100 wholesale.
I would call around and check with other shops next.

If your car runs well, then the head gasket must have been the problem for the no start condition. The head could have warped causing a leak which caused the overheat condition, which lead to a further damaged head gasket.

4 cyl. cars are known for this problem, but it happens to V-8's as well.

Watch those coolant levels in 4 cylinder cars, especially.

Are you adding coolant?
Yes ......means it's going somewhere.
Fill the coolant tank to the top...right to the top....leave the cap off and run the engine.
If you see bubbles you need a head gasket.
The intake gasket is another source of coolant leaks and at this area the coolant can be sucked into the engine and produce a white smoke.
Does the car run rough at the first start in the morning....could be antifreeze burning off in the cylinder or area that was leaking overnight meaning cyl gasket or intake gasket.
Look at the rear head to block area below the exhaust manifold.
Is there any trace of coolant or stains of coolant......yes means head gasket time.
Pressurizing each cyl at a time with air with the valves closed in that cyl will quickly show the location of the bad head gasket with bubbles coming out of the fill tank on the bad cyl (s).
Head gasket leaks don't always mean milky oil.

Do the block chemical leak test and coolant pressure test to rule out blowning head gasket.
Check all freeze plugs to rule out coolant leak on the hot engine block.
Check for any hose leak.


Start monitor for coolant and oil lose.

if the engine jumps time (most likely at start up) it will bend several valves in cyl head. when this happens the engine will not start or run. the effected cyl head or heads need to be removed and reconditioned or replaced. cyl heads probebly ok but valves will be bent.

go to an auto zone because they can give you a print out and also ask them to let you look at the head gasket and the will give you an idea of you are dealing with