Allis d262 diesel motor help required

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   I am currently restoring a allis dd grader fitted with the d262 diesel motor, i have comprehensively rebuilt the motor and when test running the motor before refitting it i noticed it has a loud heavy knock, i have  dismantled it twice now to locate the problem but no signs of any faults? 

Has had full rebuild kit, pistons, liners, crank grind and matched big end shells, fuel pump and injector rebuild, head overhaul with new valves.

starts easily and has 35 psi oil pressure.

Any help would be much appreciated, thanks.

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rangertown Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 14 Aug 2016 Location: Australia Points: 11	Post Options Post Reply Quote rangertown Report Post Thanks(0) Quote Reply Topic: Allis d262 diesel motor help required Posted: 16 Aug 2016 at 7:43am
	I am currently restoring a allis dd grader fitted with the d262 diesel motor, i have comprehensively rebuilt the motor and when test running the motor before refitting it i noticed it has a loud heavy knock, i have dismantled it twice now to locate the problem but no signs of any faults? Has had full rebuild kit, pistons, liners, crank grind and matched big end shells, fuel pump and injector rebuild, head overhaul with new valves. starts easily and has 35 psi oil pressure. Any help would be much appreciated, thanks.

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TramwayGuy Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 19 Jan 2010 Location: Northern NY Points: 11324	Post Options Post Reply Quote TramwayGuy Report Post Thanks(0) Quote Reply Posted: 16 Aug 2016 at 12:56pm
	Piston hitting head? Or valve?

rangertown Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 14 Aug 2016 Location: Australia Points: 11	Post Options Post Reply Quote rangertown Report Post Thanks(0) Quote Reply Posted: 17 Aug 2016 at 3:32am
	The sound seems to match that noise, but cant see any trace of it after removing the head.