cyl liner won't budge

E

Evan

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Location
Texas
This morning I put the cylinder in the oven & set the heat @ 300f. Cooked for 10 minutes. Got it out on the back porch set it up side down. Gave it a moderate kaiyay w. / wood several times. Pretty good grooves in the wood but the liner won't budge! Should I try 400f? For 20 minutes. Used Penetrating oil. Didn't stink up the kitchen like I thought it would. Liner I want in says TIP CCs Trattato. Measures the same. Inside on both will be bored.
Then I put the voltage regulator back on w/ rubber bushings. There is some tight play. I guess its Ok...or should it be loose?
 

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Evan said:
This morning I put the cylinder in the oven & set the heat @ 300f. Cooked for 10 minutes. Got it out on the back porch set it up side down. Gave it a moderate kaiyay w. / wood several times. Pretty good grooves in the wood but the liner won't budge! Should I try 400f? For 20 minutes. Used Penetrating oil. Didn't stink up the kitchen like I thought it would. Liner I want in says TIP CCs Trattato. Measures the same. Inside on both will be bored.
Then I put the voltage regulator back on w/ rubber bushings. There is some tight play. I guess its Ok...or should it be loose?
Click to expand...
Fahrenheit is a shit temperature scale, and 300 of them is not enough! 350 - 400 should do it. The penetrating oil is hindering not helping you.
J
 
Could try this: After heating the cylinder head to say 350+ wipe the liner with a cold water spunge and try it FAST !
 
300°F isn't too far off, close to the 150°C I usually use. You can up this to 400°F, but not too much more... Do not use penetrating oil.

If it won't budge at 400°, have a couple of wooden blocks ready outdoors on which you can support the barrel, with the top surface facing down and enough room underneath to allow the liner/s to drop out. Also, have a garden hose ready and the sprinkler nozzle set to a fan pattern. Place the hot barrel upside down on the blocks and spray a good amount of water on the inside of the liner you want to remove, should simply fall out.

You may find a fair amount of carbon built up on both the liner and in the barrrel bore, this often prevents easy removal. This carbon needs to be completely removed before a new liner is inserted, a Scotchbrite pad is fine.

Really stubborn liners can be removed with a hydraulic press, fiddly and potentially hazardous. An alloy plug that fits snugly to the bottom of the liner is recommended.

piet
 
I've never done a liner removal so could be talking complete bollocks, but I'm wondering if 10 minutes in the oven is long enough for a good heat soak. It's a big chunk of metal. I reckon I'd have left it in for half an hour.
 
The normal 750 operation Cylinder Head Temperature is around 315 to 320 F.


4704799160_4aea0ac303_o.jpg
A Stewart Warner Mechanical Cyl-Head Temp Gauge in Fh on a 70 Breganzie 750 SF after shut down.

Just saying if the Cylinder reaches 330F in normal operation - It's going to take around 400F to pop the liner. Considering most engine Cylinder bore liners are locked in place with LocTite Blue.
 
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When I did my 2/s barrel I wrapped the fins in aluminum foil, thinking it would hold the heat a bit longer and give me a few more seconds to work.
 
Dellortoman said:
I've never done a liner removal so could be talking complete bollocks, but I'm wondering if 10 minutes in the oven is long enough for a good heat soak. It's a big chunk of metal. I reckon I'd have left it in for half an hour.
Click to expand...
More like 45 min. An IR thermometer helps determine if the sucker is hot enough.

piet
 
Basting with oil is not recommended!

I've done probably three or four set of barrels - always dropped out nicely. never thought of the fine mist inside the cylinders - makes sense tho.
 
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