Liner Removal

[PJGD]

I am building a cylinder head air flow test rig at the moment (more on that later), and for the fixturing I needed a couple of cylinder liners. The only spare liners that I had were in a spare crankcase that had been sitting under the bench for years (decades actually), so I needed to extract them. In the past I had attempted to remove the liners, but they defeated me when they jammed tight after partial removal, and this is how they had remained.

Now with more time available, I had another go. I built up a liner extraction tool as seen in the first photo, but even using a long handled spanner [wrench] on the ½" threaded rod and using as much force as I felt prudent reacting against the crankcase they still would not move. Even after a good soaking immersed in my cleaning bath and heated up to 60°C, there was no movement. Eventually, I was successful after applying WD40 and taking the heated bath up to 75°C where I assume that the differential expansion of the aluminium vs the cast iron liner was enough to break the bond. Without a doubt, these were the hardest liners to remove that I have come across so far.

Liner Pulling Tool-2.JPG

Liners After Removal.JPG

Crankcase After Liner Removal.JPG

[Keith Clements]

I have dozens of liners so could have saved you the trouble!!
Interesting project.