where did this bolt come from ? !!

[pionte]

The engine is a 2.1 MV , I bought it as a non runner ( believe it or not it actually did run... admittedly a tad lumpy ! ) The previous owner had just rebuilt the engine with donor heads to replace the original ones with snapped exhaust studs, It ran sweetly for a few hours until it misfired then pumped coolant out the exhaust...


Obviously the cylinder is now toast, and Im undecided whether to bother to rebuild it , but where has the bolt come from that did the damage ? ! Its a very fine thread so maybe a 8mm bolt, Im guessing that it must have gotten dropped down into the inlet tract then sucked into the cylinder .

[Dazco]

No idea where the bolt came from but love the pic

[CovKid]

If the shape is anything to go by its about the size of a tinware screw. It may have been languishing in the linlet pipe for years. It just needs extreme camber or to go round a roundabout too quick and in it goes. Could well have dropped in when the engine was partly stripped down in the past.

[pionte]

If the shape is anything to go by its about the size of a tinware screw. It may have been languishing in the linlet pipe for years. It just needs extreme camber or to go round a roundabout too quick and in it goes. Could well have dropped in when the engine was partly stripped down in the past.

I hadnt thought about a tinware screw... but you could be spot on. What amazes me is the lack of damage to the bores, they must be pretty tough .

[Oldiebut goodie]

That'll polish out!

[CovKid]

With an angle grinder

[pionte]

This is what the head looked like




I would love to borrow your polishing cloth OBG ,



fortunately I have some spares that look slightly better condition.. A working 2.1 MV must be worth something , so maybe in the coming cold dark evenings it may be worth bolting it back together .