Over the weedend I yarded out my motor to fix my oil leak, Rear Main Apone yarding it out I got to see thing a bit better. Cam and lifters and chain toast for . Pulled heads for just because pistons felt fine...Flipped it over pulled the pan, pull a few caps checked looked fine Oil pressure has all ways been good.. Next I make a attempt to remove the rear main seal.. Not happening. Start popping the pistons. First four looks good. now the other bank. OMG two pistons shot. Now pull the crank. some bearings were fine others not. Dangit is a shame tossing forged piston. So brought it to the shop Pulled the plugs while the parts were in the washer so got a bunch of clean part Tomorrow block gets washed sonic testing. heads parted. Finger out what we need Then do the 3 b's bore balance blue print...... 400 block has some oil improvements done got the 5/8 pick up tube.. Already Benn bored to a 436ci if my math is right. asked machinist about going 455 if needed for pistons... answer if it checks out good no problem.
Well if those are the factory Rods that the motor started life with then its high time to replace the rod bolts and then check and resize as needed . After 4 torque up / stretch sessions on those bolts your playing with Fire if you don't!!
WHY are the pistons "shot"? WHAT is wrong with the bearings? I'd be trying to figure out how to avoid destroying the new parts by fixing the problem(s) that wrecked the old parts.
The PO distroyed the motor smoking to much pot. running it low on oil & water and what oil he did use did not have zink in it
Lol! Which came first using the water that should have been in the motor to then grow pot , or did you have the pot on hand first?
Honestly. He was a pot grower. he must have put some stop leak stuff in the oil.. Car was a sitter how long I didn't ask no one even tells the truth no tabs on plate.. Got the car in sept Chaged oil. fixed other leaks including intake manifold Maybe got a 100o on motor change oil again . Thats when the pan leak dumped . I guess I flushed out his stop leaks.. Yes the rad sprung a leak right after I fixed the intake and the changed oil.
Bit of a update. yesterday picked up a 73 455 LB. This motor looks like it was well cared for. Calling it a 73 because I see 73 cast onto the heads.
Well the block is striped down most parts have gone thorough the washer. Still need to pop out the cam bearing & oil plugs and it will be going for a hot soak. Then I'll start measuring. At this point this block looks a lot better than the 400 over bored block. Heads choice I got the 1106 430 heads. and the 73 heads forgot the casting #s whats the better choice. I'll get the casting numbers later if that helps..
Pre wash Pic Got it all striped down in the hot tank now. Striped the heads more than likely go with the 73s
Was going to ask what color you had it "striped" but then didn't see any in the pics? Is it vertically striped or horizontally striped? What color? Can't see them in the pic, can only see a stripped down block. Sorry, couldn't resist.
Got weird question.. Older heads had just 2 holes on the intake side for the heat riser. tap and pug them.. the 73 has a huge mammoth cavity that the 2 holes are in. How the heck you plug those. Guessing,,,,,,, Melt the old pistons down and fill the cavity..
Quite the difference. Out of the hot tub and washer. Crank&rods measured to be in very little work needed. polishing, tweak the oil journals & minor honing..
Just plug the holes with cup plugs the same way. But yeah, if you can fill the whole cavity with melted aluminum, that's even better.
