Marmaduke
Well-Known Member
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
flat
Well-Known Member
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?
Vertical scoring + Oil Glow Plugs....very good possibility
flat
Well-Known Member
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
Marmaduke
Well-Known Member
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
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??
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??
blue beasty
Leaks an prone to bits dropping off
Seized tensioner?
+1 Blimey !!
IIRC weren't most of the 300's fitted with the kit under a recall ?
Jonnyb1990
Well-Known Member
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
