2009 volvo D13 Engine Help... PLZ

My problem is i change the cylinder head 6 month's ago in July and now they say the problem is with low comprsion on cylinder 5 , how it possible in such short period to get demage.

 

My problem is i change the cylinder head 6 month's ago in July and now they say the problem is with low comprsion on cylinder 5 , how it possible in such short period to get demage.

 

How many miles did it have when you replace the cylinder head? And now? How did the liners look while the head was removed?

How are they coming to the conclusion that it is a head problem?

 

One thing happen often the VEB piston internal nut come loose and keep the exhaust valve open and generate a low compression on that cylinder. Ben

 

Possible yes.

That sucks.
However.. it's been two months since then and proving that might be hard.

It's also could be the premature valve guide wear problem that some motors had...

 

With the roker shaft removed it’s a 5 minutes job to inspect all veb piston nuts to know if they started to unscrew by themself. When a veb piston nut unscrew your valve lash will show you too tight in fact the veb piston comes taller than normal and reduce the valve lash. Do you understand me ? Ben

 

The truck have 810000 miles and head was replaced 30000 milea ago,and they say everything is ok with lower engine, now on 8015000miles they change the injectors becouse truck was shaking and low power, compresion was ok then and after changing injectors shacking stop buth power was still low, boost was going to 22 psi only, i change turbo and actuator and still same problem, then i go beck 6 week later and they make diagnostic and say cylinder 5 have 81% compresion only, probably the head is the problem or piston or liners they dont know.or maybe they do something and dont wont to admit.

 

On balance test shows
cylinder 1 is -3
cylinder 2 is 5
cylinder 3 is -10
cylinder 4 is 2
cylinder 5 is 14
cylinder 6 is -7

 

Next week i will take the truck to difrent shop to inspect the truck and i will show them you post to chack that too , thx for you information.

 

If you go to a Volvo dealer ask them to have a look to the bulletin. FSB 213 002 Ben