Installing Rockers

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comnoz said:
Actually cooling the spindles is counterproductive. [counter to most claims]

Since the steel is higher density than the aluminum it will absorb heat from the aluminum faster when it is cold. So a cold spindle will make the hole in the head shrink faster than a warm spindle will.

The same applies to bearings in an aluminum bore. The bearing will stay loose in a hot bore longer if the bearing is installed at 100 degrees F than it will if the bearing is cooled in the freezer first.

Try it some time, I have.
Click to expand...
Good information Jim. I, like many others, have for a long time put the bearings in the freezer while heating the aluminum, never considering the heat sink effect of cold steel.
 
Hortons Norton said:
I cannot see any difference between 77 and out of the freezer, gotta go into town so i'll leave it in a little longer.
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comnoz said:
Actually cooling the spindles is counterproductive. [counter to most claims]

Since the steel is higher density than the aluminum it will absorb heat from the aluminum faster when it is cold. So a cold spindle will make the hole in the head shrink faster than a warm spindle will.

The same applies to bearings in an aluminum bore. The bearing will stay loose in a hot bore longer if the bearing is installed at 100 degrees F than it will if the bearing is cooled in the freezer first.

Try it some time, I have.
Click to expand...

But you chill your wrist pins?
 
swooshdave said:
You beat yourself to it!



I watched this a bunch of times. Not sure why I thought you chilled them.

You don't. I won't the next time either.
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I was thinking more of the flack I have received over the years about not cooling main bearings.
The parts are in the oven for a video.
 
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