[greg etts]

i finished the top of my 489 blower motor yesterday. measured for pushrods. all that is left is to get the right ones. as i am collecting my paperwork to store i read the piston sheet fron Ross and notice something i missed. it says that the pistons are machined for double spiral locks ( 4 each piston ) I put them togethere with only one per side. ack... Do i have to strip it back down to the block and redo them. what would happen if I dont ?

 

[EMcIllece]

This is from JE pistons: I would think if you don't install all the locks the wrist pin will move around too much.​

INSTALLING SPIRO LOCKS
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For installing Spiro locks, grip each end of the lock and pull apart (approx.

​

3/8"-7/16"). The lock will resemble a small coil (fig. 5). The lock can then be


spiraled into place almost as if you were screwing them into a groove (fig. 6).

When the locks are properly seated, only half of the lock will be visible above

the groove. Most JE Pistons that require spiral locks will need 4 locks per

piston, two at each end of the pin. WARNING: It is important that the correct

numbers of locks are installed in each piston or severe engine damage may

occur. WARNING: Do not over stretch spiro locks and do not reuse spiro locks!


INSTALLING WIRE LOCKS

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Install the end of one lock at 90 degrees from the pick lock groove.

Carefully rotate the lock into the groove without kinking or deforming

the lock. Firm pressure will be needed to install wire locks into

piston wire lock groove. After the first lock is in place, seat the lock

by solidly hitting the wrist pin with a brass drift pin into the wire

lock. Now install the wrist pin and connecting rod into the piston,

install the second wire lock the same as the first. Just as a precaution,

after final assembly of both locks we recommend hitting each

side of the wrist pin with the brass drift pin back and forth an additional

time. Perform these functions on a cloth towel or soft rubber

pad to prevent damage to the piston occurs.

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[greg etts]

ooohhhhhh, that hurts.

 

[1badss396]

Ouch. Have a BEER and get-er-done!:beers:

 

[BillK]

If you dont mind the thought of a piston pin coming throught the side of the cylinder, then leave them alone. Otherwise, take it apart and fix it. Why did you think they put 32 locks in the package ?????

 

[EMcIllece]

SPARE PARTS??
This on is on me :beers:

 

[greg etts]

oh well, so it goes. gives me a chance to recheck all my work.

 

[Bomber '67]

I did the same exact thing on my first engine build - and yes I did disassemble everything and do it right. Other than the extra work and a few assembly parts, this is the time to make sure it is correctly done.

Thomas