Snapped pushrod !

right people was driving my 1967 series 2A (300 Tdi conversion) home on tuesday giving it some going up a hill when i had an Ohh s**t moment and bang bang bang bang pulled over and opened the bonnet to see nothing obviously wrong nothing come off so not having any tools nursed it home with the noise still going off (hard to explain just a really load knocking) been busy so only got chance to look at it tonight and removed the rocker lid to find number four exhaust rocker (number 8 pushrod) flapping about pulled out the pushrod to find it considerably shorted than it should be with a magnet removed to rest.



took off the rocker shaft and pulled the rest of the rods and found there are two types? i can only presume its snapped a belt in the past and replaced only four. there seem to be plenty of threads about snapped belts but never the pushrods its slightly bent but nothing compared to the ones shown on here.



so now to my question, will it be ok to presume its only the rod thats damaged nothing further inside the engine, will i be able to just change the rods or could it be something more important inside the engine ? it had always made a puffing sound from that cylinder even after redoing the clearances all the valve caps where in place (apart from 8)

any ideas welcomed Sam

get a torch and look down hole at brass followers

Never seen that happen before . strange one

jamesmartin said:

get a torch and look down hole at brass followers

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ok cheers James any clue on what to look for ? or will it be obvious

5cylindertimebomb said:

Never seen that happen before . strange one

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yeah heard of them bending but never snapping just can't work out why

damaged sockets

Thanks James ill look in the morning and report back

Had a look James through the head the cup looks just like the others used another rod and it's free to slide up and down, pulled off the front cover and timing is all correct not jumped teeth. Safe to leave the head on or is there a risk I've damaged piston driving it ?

Pulled the head will have to order pushrods (full set?) so may aswel get the gaskets piston and valves look ok no severe damage just slight marking under the exhaust valves on all 4 pistons

if it all looked ok, then i think you could have just changed the broken one