How hard should it be to press out a cylinder liner?

[gggGary]

I have a cylinder with a busted sleeve bottom and I am assembling a light weight "mock up" motor. So thought I would try out my el cheapo harbor fright bottle jack press. I was surprised how easy the liners pressed out, is that normal? I thought it might tax the light duty press they were a "press fit" but came out smoothly. With cold liners and heated cylinders new ones might drop right in. I am guessing new liners would need to be bored after installing? Just wondering.

 

[grizld1]

When the cylinders are heated the liners will usually drop right out, and the liners should be removed with the cylinders hot, to avoid moving any aluminum with them. Re. new liners, yeah, they need to be sized to the pistons.

 

[gggGary]

Well I at least I started with a "pre-ruined" part....

How hot is "hot"?

 

[Punkskalar]

Well I at least I started with a "pre-ruined" part....

How hot is "hot"?

200 degrees has worked for me...

 

[Sundie]

Trick:

put jugs in oven upside down, on a cookie sheet, supported on just the fins (only need like 3 cm of support) so the liners can fall free

crank oven up. listen for falling liner noises. When you hear the second one, turn off oven, open oven door, leave sit for 45 mins to cool

(yes, you *could* take them out of the oven, but the chances of you f'ing up and dropping a liner or the empty jugs on the floor at high temps is relatively high, and this will piss off the missus more than a: using her favourite cookie sheet, or b: heating up greasy parts in her oven)

 

[Sundie]

I was surprised how easy the liners pressed out, is that normal? I thought it might tax the light duty press they were a "press fit" but came out smoothly.

They are only "pressed" in there enough to prevent them from rattling around. When the head is on, it locks them in place.

 

[sreimer]

It does help to do this when the wife will be gone awhile! It does stink up the house

 

[angus67]

i had my oven at 250. took 20 minutes after preheat