Jim Yergin Posted March 30, 2015 Share Posted March 30, 2015 I am in the process of tearing down the engine out of my 1956 Ford Thunderbird. It is a 312. The connecting rods are stamped with numbers 1 through 8 however several of them don't match the number of the cylinder it came out of. For example the rod marked number 3 came out of cylinder number 2. On reassembly should they go back in the cylinders they came out of or in the cylinder with the corresponding cylinder number? It appears someone has been in the engine before.Jim Yergin Link to comment Share on other sites More sharing options...
keiser31 Posted March 30, 2015 Share Posted March 30, 2015 Numbers on the rods and innards should match the cylinder number. Link to comment Share on other sites More sharing options...
JACK M Posted March 30, 2015 Share Posted March 30, 2015 They should have #s stamped on the rod and cap. They should match and be next to each other.They should be assembled with odd numbers on one side and even numbers on the other side. Usually so that they can be seen when the engine is upside down and you are looking down at it. (assembling)It is not good practice to put an odd numbered rod on an even numbered side as it could lead to a spun bearing. However it probably wont hurt to mix the on the same side, although it might confuse someone in the future. OH WAIT, it just did....LOL Link to comment Share on other sites More sharing options...
LI_BENTLEY Posted March 31, 2015 Share Posted March 31, 2015 If you are not going to rebuild put back as you found them, if rebuilding put in proper place with new bearings etc. Link to comment Share on other sites More sharing options...
cahartley Posted March 31, 2015 Share Posted March 31, 2015 Another thing to consider is if there is a tiny hole on one side of the rod it is there for oil to escape. The hole side faces the camshaft. Link to comment Share on other sites More sharing options...
Jim Yergin Posted March 31, 2015 Author Share Posted March 31, 2015 Thank you all for your comments and guidance.Jim Yergin Link to comment Share on other sites More sharing options...
edhd58 Posted April 6, 2015 Share Posted April 6, 2015 I disagree. Well not completely. If the rod journals have been reconditioned,new bearings installed and the engine is being given a major overhaul, isn't the only real important factor that the rod caps be kept as they were when reconditioned? And shouldn't they have been marked so the halves would stay together, 1/1 -- 2/2 etc? What I am saying is, if the engine had a major overhaul and all the parts reconditioned the only thing not putting the rod marked 1 back in cylinder 1 will do is give us reason to ask why ??? Link to comment Share on other sites More sharing options...
JACK M Posted April 6, 2015 Share Posted April 6, 2015 Yup. Link to comment Share on other sites More sharing options...
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