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Replacing cil head thornycroft T90 Why , last year the engine had bad cold starts , i found that 2 glowplugtips had broken tips and 1 a broken heater element , time for replacement.! thornycroft ID plate rockerarms and pushrods ready for lift off head removed , a test of the valves with petrol after cleaning says that 7 valves where leaking one broken tip off the glowplugs removed with this 4 mm diam. tool , i tick it 10 mm. into the burning chamber then give a few ticks with a hammer to put the tip down via the fuelinjector hole (i think the length off the broken tip was too long for the burning chamber) there he is ... A local revise workshop did the job, valves where ok,. and valve guide where in good condition they told me new headgasket after cleaning the top off the block repainted in thornycroft blue , also after testing the fuel injectors there opening pressure was stil 135 bar after 10 years , in 2004 i changed the nozzles for new bosch ones . back on the engine , got some unf nuts from a local motorbikedealer , the nuts off the exhaust manifold where not so good anymore , its really difficiult to find nuts and bolts with this thread,here in Nl .also the exhaust manifold was repainted , new gaskets for the pipe from the exhaust cooler too the cil.head are made by myself from oldseacharttpaper, rockersarms back on the head but before i got also the 3 headnut problem , i had no crowfoot i did it on an alternative way i turn the rockerarms and shaft 180deg, and mount it only with the 4 headnuts (the exhaust cooler was not mounted ) , on this way it was possible too torque all the nuts on the right way after torque it at 10 kgf. , after this i remove the 4 nuts off the rockerarms and shaft and remove it and put it back, turn this one 180 deg. and mount and torque again the 4 headnuts . check and made the right valve clearences , fill up antifreeze and water and check all hoses for leakages then bleeding the DPA fuel pump and injectors . and give it a try too start with a full big battery after 30 seconds glowing ,it came back to live , after a minute it was really running as a young lady a testtrip was good for bleeding the coolwatersystem and i found two little leakages one at a coolwater hose and a fuelinjector pipe nut , after retorque this the problem was over . i start the engine after a week after a very cold night it starts after 10 sec. glowing real quickly and is running very nice without any smoke , i,m happy all the best and Merry X mas too all from Vincent from the netherlands PS. after how many hours i need retorque the headnuts ? (the local workshop told me that i can pick up a crowfoot for the famous three nuts under the rockershaft)