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Lucky 312 find. A different setup than usual.

Posted By 46yblock 14 Years Ago
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Glen Henderson
Posted 14 Years Ago
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That front mount is also good for putting a y block in a hot rod, just fab up frame mounts and use the donut pads.

Glen Henderson



Freedom is not Free

Letohatchee, AL
46yblock
Posted 14 Years Ago
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Good information Glen, maybe someone will be able to use the low mount fan.

The bore is .040 OS, with a small wear ring at top of the cylinders.  Cant find my calipers.  Cylinders all looked good though pistons arent removed.  The block has been decked.  Edit:  After looking at the cylinder walls again with a flashlight, they will probably need to go another OS.  Hopefully there are some .060 OS pistons on hand. 

Heads look very good so far, havent removed any valves yet.  One looks like it was milled more than the other, but they havent been measured.  Rocker shafts show some wear and need replaced. 

The worst thing found is a broken bolt in one of the side mount engine bosses.  Maybe the broken bolt is from a wreck which resulted in the motor's removal from the original car.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.


46yblock
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Todays teardown revealed a 10/10 crank.  There is a little wear on one of the rod journals.  A 20/20 crank is likely. 

The Pistons looked great.  I will let the machinist say if it needs bored.  I sure hope not, because the other set of 312 pistons on hand are .040 too. 

The cam had a weird wear pattern.  Instead of a nice ovate provile it was definitely stepped.  Too bad since it looked like something exotic, different intake and exhaust profiles and different lifts. 

The piston to deck measurement was all over, from .028 to .038.  Rods had been resized, plus there was a mixed set.  A new set of JM rods may be the ticket. 

So the plan is to take in the block first and have it maged and checked for main bore line.  Also will deck .010 more.  Whoever put together the engine missed the reduction in main bearing bolt specs, because they were 128 ft. lbs.  I am keeping fingers crossed on that one. 

  

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.


pcmenten
Posted 14 Years Ago
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Mike, I'm curious to know if they got the right main cap bolts in the right main caps. The rear main cap should have slightly shorter bolts than the other mains.

Best regards,



Paul Menten

Meridian, Idaho

46yblock
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Paul, thanks for reminding me of a possible diff. in bolt lengths.  I kept bolts and caps together, and will look tomorrow.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.


46yblock
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The shorter bolts were in the back cap.  Head bolts were correct also.  The broken motor mount bolt that has been there for a half century finally came out today! 

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.




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