Broke my 390 ,tore it apart, and now to hopefully buy the pieces to put it back together, long story short ,piece of broken pushrod cup got into the cam and distributor gear and broke the oil pump drive .Shut it down pretty much right away but there is some galling on the crank and bearings that I hope will polish out ,will find out this week .Crank is already ground 10/20 .Found a std/std 390 crank that may polish . If I have to use another crank does it mean rebalance the assembly again ?? Also what bearings ,haven't been to the machine shop yet so looking to be informed when I do later this week I hope .
It sheared the roll pin on the distributor as well ,but being standard rolled to a stop tried to start it , didn't know what was up till I pulled the distributor cap off and the rotor wasn't turning ,flatbed home ..
An oem crank will not require a rebalance. There is a good assortment of bearings available and a variety of prices.
Been looking at the sealed power 3/4 groove main bearings Clevite 77 p rod bearings with grooved upper shell.
A call to Don Palmer in Georgina will answer all your questions.(Near Orillia) On of the Best FE men I have ever encountered.
Don't think very highly of Don Palmer !! Wouldn't recommend him to anybody.. not that he doesn't know Fe's !!! Thanks Jeff
Take a look at the flange that the distributor shaft goes down thru to check for breakage. A 390 is a very easy engine to repair/ rebuild, and since you need a crank, you could easily upgrade to a 410/416 while it's apart. I know most of the FE "majors", never heard of Don Palmer. Also, an FE crank can run at a pretty big undersize, if you can find bearings to fit
Just looking to get the motor put back together as cheaply.as possible , ran strong ,actually going to detune it more for the street. Was running a 680 ? Lift solid roller cam , 1961 hp block , not drilled to run hydralic
Sounds like it started life as a 375 Hp 390. Those came stock with a Factory aluminum intake, dual point dist. and a Holley carb. Most also had the shorty cast-iron exhaust manifolds. Those were pretty good for there day.