Cylinder Liner
Thread Starter
|
Advanced
Joined: Sep 2017
Posts: 50
Likes: 4
From: Ontario
Cylinder Liner
Anyone know how critical cylinder liner protrusion is? Is it acceptable to file the face flat with a finishing stone or did I just ruin my jug? It's a 120 ultima.
New head gasket thickness is .085" so I'm thinking this is enough squish.....
New head gasket thickness is .085" so I'm thinking this is enough squish.....
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
I would not run a cylinder that protrudes above the deck; it is defective and bad juju waiting to happen. .085" squish? Are you kidding or am I missing something.?
Last edited by djl; Dec 31, 2023 at 05:14 PM.
Thread Starter
|
Advanced
Joined: Sep 2017
Posts: 50
Likes: 4
From: Ontario
There is a spec on some engines for the height of the cylinder liner. It protrudes in order to add clamping pressure on the head gasket. Im talking a few thou higher than the jug, nothing major. Just curious if evo has a spec on that. Its a 120 ultima bored 30 over.
Yes the gasket thickness on inner rib measures .085", this is the area that creates the actual seal.
I'm just looking for some literature on the liner dimension. I'm guessing based on these responses it'd not critical.
Yes the gasket thickness on inner rib measures .085", this is the area that creates the actual seal.
I'm just looking for some literature on the liner dimension. I'm guessing based on these responses it'd not critical.
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
OK, not familar with the Ultima so my thinking may not be applicable and I am no help at all. I have had cylinder liner protusion on a set of sleeved OEM TC cylinders; made a nice paper weight. TC OEM head gasket is .045" but .030" is the typical target for squish\ different animal I guess.
Road Master
Joined: Mar 2012
Posts: 1,020
Likes: 983
From: Ohio
If the piston is protruding from the cylinder with a thick head gasket like 0.085", it may be fine in that regard. It just depends on what the amount of piston protrusion is. As mentioned above, you want the squish in the 0.030" to 0.040" range.
As far as the liner protruding, how much are you talking about? To my knowledge, there shouldn't be any. I've never seen that on any HD cylinder.
As far as the liner protruding, how much are you talking about? To my knowledge, there shouldn't be any. I've never seen that on any HD cylinder.
Thread
Thread Starter
Forum
Replies
Last Post
jmd897
Engine Mechanical Topics
6
Sep 26, 2019 11:56 AM
