Engine seized 300tdi

two photos of the same bore there...

You are only showing one bore?

oops , got beaten to it, LOL

Sorry cold fingers

can you feel anything with your fingernails? or is it just discolouration?

neilly said:

can you feel anything with your fingernails? or is it just discolouration?

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There is a slight roughness where what looks like the staining is but I've never seen those vertical lines in a piston bore before but I can't feel any ridges there either

Does it turn over with the head off?

By hand I mean lol

Next thing is to drop the sump and look at the big ends

Ring damage??

Saint.V8 said:

Ring damage??

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That head and valves look okay, I wonder if the head gasket has leaked water into the bores when it was standing and caused that staining? Could also have been the white smoke cause.

ring failure letting oil past?

flat said:

That head and valves look okay, I wonder if the head gasket has leaked water into the bores when it was standing and caused that staining? Could also have been the white smoke cause.

ring failure letting oil past?

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Vertical scoring + Oil Glow Plugs....very good possibility

Saint.V8 said:

Vertical scoring + Oil Glow Plugs....very good possibility

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If the big end is ok then a hone and new rings may sort it if the scores aren't bad otherwise overbore and new Pistons

flat said:

Does it turn over with the head off?

By hand I mean lol

Next thing is to drop the sump and look at the big ends

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I think I may have found the culprit sadly,

Brand new dayco timing belt that's now one solid lump. Doesn't explain the scoring though but it's that fine I can't feel anything. I'm thinking that the oil came in through the valves when the belt went and the pushrods bent

Well that is a mess,

But hopefully it is a simple repair job then. Wonder what caused the belt to fail?

Did you by chance take any photos of the bores when you had the head off before? maybe that the "scratches " were there and have had no ill effects.

Cheers

Oh, yeah, that's erm...fecked...

Misalignment of the idler maybe or incorrect belt tensioning possible?? Also the 300Tdi does have FIP alignment issues that shreds belts...kits available to correct.

Tensioning needs to be done twice.

Oil from bent rods is possible and most likely in this case....

Vertical scoring, if you feel no ridge, I wouldn't be overly concerned.

And piston crown damage??

Seized tensioner?

Saint.V8 said:

Oh, yeah, that's erm...fecked...

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+1 Blimey !!

Saint.V8 said:

Also the 300Tdi does have FIP alignment issues that shreds belts...kits available to correct.

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IIRC weren't most of the 300's fitted with the kit under a recall ?

Is it possible to tell whether the belt has worn on the side due to a misalignment? do you have the revised sprocket and tensioner?

Cheers

Okay so new belt, new tensioner, new pushrods and HG and see if it works.

The pully is the wrong type, needs a shoulder on it, might have an earlier type kit already on it or the op cheaped out and didnt change it

Jonnyb1990 said:

The pully is the wrong type, needs a shoulder on it, might have an earlier type kit already on it or the op cheaped out and didnt change it

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I thought that this was the later one already fitted