dustym
07-04-2008, 03:31 PM
Newbie needs help.
I am putting back together a 304 for our Jeep. The engine that came out had the rockers that were tied together, the engine that I just had rebuilt had rockers simular to gm. I had installed new push rods from summit, and torqued them down to 25 ft lbs. When I tried turning the engine around, it stopped and with a little more persusion it rotated and I heard a bad sound. One pushrod was broken in 2 places, and checking the rest 2 more were bent. Took the head back off of the side that the push rod was broken, and everything looks fine. No bent valve or messed up piston. Well I pulled a pushrod out of the old engine and compared to the new ones and they were about 1/8 to 3/16 or so difference. The engine I rebuilt is of unkown year but the machine shop did put hardend seats to use with unleaded fuel, so maybe before 73. The engine that is in the jeep is an 80.
Was there a difference in pushrod lengths, and which would be ok to use. Should I just snug the rockers down untill the rod doesnt spin and go 1/4 more turn?
Thanks for any help.
Tim
I am putting back together a 304 for our Jeep. The engine that came out had the rockers that were tied together, the engine that I just had rebuilt had rockers simular to gm. I had installed new push rods from summit, and torqued them down to 25 ft lbs. When I tried turning the engine around, it stopped and with a little more persusion it rotated and I heard a bad sound. One pushrod was broken in 2 places, and checking the rest 2 more were bent. Took the head back off of the side that the push rod was broken, and everything looks fine. No bent valve or messed up piston. Well I pulled a pushrod out of the old engine and compared to the new ones and they were about 1/8 to 3/16 or so difference. The engine I rebuilt is of unkown year but the machine shop did put hardend seats to use with unleaded fuel, so maybe before 73. The engine that is in the jeep is an 80.
Was there a difference in pushrod lengths, and which would be ok to use. Should I just snug the rockers down untill the rod doesnt spin and go 1/4 more turn?
Thanks for any help.
Tim