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

Post by **Krons** » 05 Jun 2023, 08:43

The valves were re-done and they didn’t remove the carbon from the combustion chamber?

eitankon · Post by **eitankon** » 06 Jun 2023, 10:59

Update

Did not agree to remove piston until head will be checked again. Engine head was sent to recheck .

eitankon · Post by **eitankon** » 06 Jun 2023, 11:03

Krons: they did it , of course.
This carbon been built during engine running for some time while testing it. Only , I guess for a few hours….
Mech says it was built so fast cause cyl1 has no compression so it effects the way fuel is burned

Post by **cn90** » 10 Jun 2023, 10:15

How many miles/km in the engine when this happened?

Have you checked the alternator pulley, is it seized?

eitankon · Post by **eitankon** » 14 Jun 2023, 23:07

180,000 km.
Replaced the alternator pulley , belt and tensioner . Also alternator did not charge , so replace it with a used one and a new Bosch regulator .

Head came back and was ok.
Removed piston 1 - pressure ring was broken.
So that was probably the reason why it had no compression.
Is it common to happen ? I don’t think so.

Waiting for mech. Hoping for good for news

eitankon · Post by **eitankon** » 17 Jun 2023, 21:35

Well , story is not finished yet.

Engine was running very well for a few hours .
Then it started to rattle . No DTC’s.
What can be the problem?

Another thing unsolved is when control cable that comes from CEM is connected back to alternator it does not charge at all. When disconnected it charges. Any idea? (Alternator had been replaced and as well new regulator)

Any idea will be appreciated .

eitankon · Post by **eitankon** » 16 Jul 2023, 02:32

Hello all.

Everything got fixed.
Engine running smooth and powerful again.

Thanks for of your assistance.

Eitan

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

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