Holed Piston - K Series
Discussion
Pulled the head of my latest project ZR at the weekend, all the signs of HG failure but bought as a non runner.
Although the pipes/expansion tank/radiator were full of crud, as the cam cover came off no more signs and when the head off, a hole found in a piston. Right in the centre, no impact damage and looked like it had been burned away. The gasket was a later MLS one so obviously been changed at some point
Never come across this before so interested to hear of ideas out there. No idea of the history and only obvious thing missing was an intake manifold gasket which wouldn't have helped!
Duncan
Although the pipes/expansion tank/radiator were full of crud, as the cam cover came off no more signs and when the head off, a hole found in a piston. Right in the centre, no impact damage and looked like it had been burned away. The gasket was a later MLS one so obviously been changed at some point
Never come across this before so interested to hear of ideas out there. No idea of the history and only obvious thing missing was an intake manifold gasket which wouldn't have helped!
Duncan
Recovered a work colleague's Rover with a partially seized engine.Would not start or run. Yet another car user who is clueless about what goes on under the car's bonnet.
Hot summer's day on the Motorway driver sees steam coming from side of the bonnet. Slows down as temperature gauge needle moves towards the red! Then steam stops and needle moves down towards normal reading so driver presses on ~ obviously everything alright...
... a few miles later on the engine starts to seize and the car slows to a standstill.
He had no idea but obviously the coolant had all steamed away so the sensor no longer had coolant to 'sense' so the needle dropped. Not only was the cylinder head gasket damamged by severe overheating in the engine without coolant, but other parts of the engine were severely damaged too. Including pistons 3 and 4.
Needed a replacement engine.
Hot summer's day on the Motorway driver sees steam coming from side of the bonnet. Slows down as temperature gauge needle moves towards the red! Then steam stops and needle moves down towards normal reading so driver presses on ~ obviously everything alright...
... a few miles later on the engine starts to seize and the car slows to a standstill.He had no idea but obviously the coolant had all steamed away so the sensor no longer had coolant to 'sense' so the needle dropped. Not only was the cylinder head gasket damamged by severe overheating in the engine without coolant, but other parts of the engine were severely damaged too. Including pistons 3 and 4.
Needed a replacement engine.
Amazing what some folk want to ignore, there was only one obvious option with mine.....
An easy enough job once all unplugged and known good engine ready to go in. Took the opportunity to service the replacement whilst on the stand. Hats off to anyone who does the belt/water pump with the motor in place, you must have very special hands...and as for the thermostat!!!
An easy enough job once all unplugged and known good engine ready to go in. Took the opportunity to service the replacement whilst on the stand. Hats off to anyone who does the belt/water pump with the motor in place, you must have very special hands...and as for the thermostat!!!
Gassing Station | Rover | Top of Page | What's New | My Stuff