S80 - 2009 - 2.5 T - alternator belt torn - engine fails to ignite

[eitankon]

Hello friends

Unfortunately all 20 valves are bent.

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Here are some pictures .

Hope they will able to rebuild the engine head.

[Eitank]

Hello friends

All valves are damaged. .

Here are some pictures

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[Krons]

That sucks. Hopefully the head can be salvaged.

[mtd240]

So the alternator belt snap caused the timing to jump - any idea what tore the alternator belt? Tensioner?

[eitankon]

Have no idea if it was the tensioner or clutch . I replaced them both (a friend of mine , many years experience said that entire set should be replaced frequently .
I wonder why it should be this way , to cause so much demagogue because of belt torn?

The engine head was rebuilt , sounds good.

Currently problem is that alternator light comes up it is not charging . It seems like when connecting the blue wire to alternator it stopped charging . Changed the voltage regulator to a new original one (as previous did not charge at all). I wonder what could be the cause for it.
Also , my mech said he cannot rev above 3000. Changed now the plugs . Hope to get good news.

[eitankon]

Hello,

Bad news.. cyl1 has low compression . All 4 have about 150 , and cyl1 has about 20-40 . So engine is not working smooth and still not rev above 3000.

Maybe the engine head/valves haven’t been done correctly so valves loosing compression?

Can it be due to camshaft position sensor/?

2 weeks now in the garage …

Any assistance will be appreciated .

[Krons]

Has to either be bad piston rings or bad seal on the valves. Your mechanic should be able to determine which. If it have compression before I’d suspect the valves.

[eitankon]

Thank you sir.

Engine was perfect before timing belt happened .
So you think as well there might be a problem with the cyl1 valves.

Hope it be solved soon.

[eitankon]

Another question please. So many ppl with serpentine belt torn getting into timing belt and destroying engines… why this is so common in Volvo ?

[eitankon]

My mech sent me a picture of the engine head , saying it looks ok to him. Now he wants to remove piston 1 maybe the problem is there.

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