i had my rebuilt engine runing today first time. just a few short runs. the thing seemed to tighten up. then starter woulnt turn it anymore. took the blowercover off. manualy turned it seemed ok put it back together. started it. then tighened up again. and now seems tight. anybody else run into this problem. valves or arc? thanks bill
Posted January 15, 2015 - 05:17 PM
Posted January 15, 2015 - 05:31 PM
The valves may not be adjusted correctly. The compression release to help starting may not be releasing when hot. If it is tight in both directions, I would worry about the piston or rod bearing clearances. Who rebuilt it? Did they record their measurements?
45 years ago my brother and I used to argue about the tolerance on our SBC engines. He would go the the tightest spec to "last longer" on his 327 in his 57 Chevy. I would go in the middle of the spec for my 283 in my 64 Chevelle to have less problems. He had a lot more reliability problems than I did and it turned out the we never kept the cars long enough to wear out the engines. I still prefer to put engines together a little loose. I've seen to many spun bearings, burned bearings, and siezed new engines. Good Luck, Rick
- Alc and superaben have said thanks
Posted January 15, 2015 - 05:57 PM
Posted January 15, 2015 - 06:59 PM
What engine? What was the crankshaft end play, ring gaps, crank journal to rod clearance? Does it turn over hard when hot with the spark plug removed?
Pop the head off to check the bore. Something is wrong and I'd rather find it than do more damage..
Posted January 15, 2015 - 07:21 PM
engine shop guy put most of it back together for me said it should be all set .its a k321 i did the shims for the end play.did have some room. dont remember the number now. hasnt realy run hot yet. very brief starting. i will dig into it tomarro. see whats going on.thanks bill
Posted January 16, 2015 - 05:34 AM
was the rod put in correctly
the rod and cap marks align. and the oil hole is towards the camshaft
when the oil hole is not toward the camshaft almost no oil gets to the rod bearing
Was my thought to !
- boyscout862 and bill3t have said thanks
Posted January 16, 2015 - 01:03 PM
Was my thought to !
thats just what it was. oil hole not towards camshaft. i call the engine shop this afternoon see what he can do for me.
- Alc, lyall and MNGB have said thanks
Posted January 16, 2015 - 01:35 PM
Hi Bill 3t, good thing you caught it when you did I know of an engine that happened on and ended up breaking the rod and the crankcase. Hopefully no damage and you get it going.
- Alc said thank you
Posted January 16, 2015 - 04:53 PM
i got an engine angel looking out for me. his name is jesus. I thought for sure this was going to be the week the little tractor restoration would be all done. crank rod cap was all scouard up. brought it back to the shop today. said he would take care of it. bill
Posted January 16, 2015 - 09:42 PM
have them crank the crank
hope it is okay and it checks out okay
now is the time to double check it