289 Build Problems

R

RatRod65

New Member

Oct 2, 2014

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Jan 14, 2015

#1

• Jan 14, 2015

• #1

Hey everyone, I'm building a 289 I got as a short block with the crank out. Guy thought he spun a bearing so he took it apart. I had the crank polished and ordered the same rod and main bearings he had in the motor. He had the rod caps on the rods but the bearings were out. I kept everything in order when putting new bearings in. Now the crank won't spin, at all. I loosened all the mains and rods, still stuck. I've concluded that rod caps must have gotten mixed up because with the nuts off them they are stuck in between the crank weights. So any idea on how to get the caps on the right rods?

 

horse sence

15 Year Member

Nov 29, 1999

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Wile Coyote's stunt double

Jan 15, 2015

#2

• Jan 15, 2015

• #2

The rods and caps are usually stamped on the sides where the come together with the cylinder number ,some times they are hard to read . Numbers always point to the out side of the block on each side . Getting the caps back off with out ruining something may be tough if they are wedged .Maybe a large pair of channel locks and gently rock and pull at the same time on the caps. Inside the rod and cap you will see a notch, the bearing locks into ,they must line up when the cap is on the rod .the closest cylinder to the front is number one and that same side will be 1 through 4 .The other side starting from the front will be 5 through 8 .

 

tos

Founding Member

Apr 27, 2001

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Cincinnati Ohio

Jan 15, 2015

#3

• Jan 15, 2015

• #3

If they are not marked then youll have to take them out and check them with a bore gauge individually till you can match them up. one thing to check though, there is a chamfer on your rods and caps that need to face the weights (or radius on the crank), if not it will lock everything up when you tighten everything down.

 

tos

Founding Member

Apr 27, 2001

896

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59

Cincinnati Ohio

Jan 15, 2015

#4

• Jan 15, 2015

• #4

Horse can you rotate that 90 deg and show the chamfer?

 

horse sence

15 Year Member

Nov 29, 1999

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Wile Coyote's stunt double

Jan 15, 2015

#5

• Jan 15, 2015

• #5

The notches in side have to be on the same side

This is the chamfer tos was talking about .One side has it more than the other .If the numbers are pointing to the outside of the block when installed it is usually correct .

 

R

RatRod65

New Member

Oct 2, 2014

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Jan 15, 2015

#6

• Jan 15, 2015

• #6

Thanks for the help guys, took it apart today and found that some of the caps were on backwards. I ordered a new set of rod bearings from summit since they aren't too expensive. Going to hopefully put it together tomorrow and see what happens.

 

R

RatRod65

New Member

Oct 2, 2014

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Jan 16, 2015

#7

• Jan 16, 2015

• #7

Ok so started putting it together again, made it to the last 2 cylinders. Number 4's rod cap got screwed up at some point either going on or coming off. There's a lump next to the threaded hole on the cap. So I'm assuming I have to replace the rod, is this correct? And if so can I just get a replacement and mill it to the same thickness at the crank end as the old one?

 

horse sence

15 Year Member

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Wile Coyote's stunt double

Jan 16, 2015

#8

• Jan 16, 2015

• #8

Do you have a pic? You can file it away if it isn't some major dent .

 

R

RatRod65

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Oct 2, 2014

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Jan 16, 2015

#9

• Jan 16, 2015

• #9

I'll take a pic tomorrow, it's more of a bulge than a dent, I think it's from going on or coming off cocked because the hole is out of round.

 

R

RatRod65

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Oct 2, 2014

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Jan 17, 2015

#10

• Jan 17, 2015

• #10

Ok so here it is, had already tried to file it but I'm sure if I kept going I would break through into the hole. So where should I go from here?

 

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horse sence

15 Year Member

Nov 29, 1999

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Wile Coyote's stunt double

Jan 17, 2015

#11

• Jan 17, 2015

• #11

I think you could have that rod and cap resized .

 

R

RatRod65

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Oct 2, 2014

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Jan 17, 2015

#12

• Jan 17, 2015

• #12

Another pic

 

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horse sence

15 Year Member

Nov 29, 1999

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Wile Coyote's stunt double

Jan 17, 2015

#13

• Jan 17, 2015

• #13

If you could file just the bulge it would be ok .Resizing the rod and cap would remove it .

 

R

RatRod65

New Member

Oct 2, 2014

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Jan 23, 2015

#14

• Jan 23, 2015

• #14

Well this is what I got. Not the square at part I've ever done. What do you think?
Thanks for the help.

 

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Realmongo

I prefer to be called "Evil Genius"

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Oct 10, 2001

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Western Mass

Feb 4, 2015

#15

• Feb 4, 2015

• #15

So are we at the point of replacing the rod?