Jump to content

how do you identify a crank


Recommended Posts

  • Replies 5
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

The L20B has larger main bearings and will not fit the L16 or L18 block unless they are turned down.


The L16/18 crank has five flywheel bolts in the end. An L20B and Z20/22/24 has six. The L20B usually has 'U60' cast on the rear throw.

Link to comment

If you were to turn the L20B mains down to fit the L18 block you could over bore 1 mm to 85mm and fit Z20E (31.75) flat top pistons on L16 (133mm) rods. This would give you a 1950cc motor with an open chamber L20B head compression of 10.2 Basically an L20B in an L18 block. The drawback is the very short deck/rod length which would add side load to the pistons and not be good for high revs. This is why the L20B is 2cm taller than the L16/18.

Link to comment

yea mike. i think thats what he did. i dont rember all the info on the motor .i came in a dime i bought 6years back.it had a holley carb onit. I blew the ring walls out in the#1 piston and never got around to fixing it i do belive that it was a 120 crank with L16 rods and a z piston that was milled to a flat top it revd nice.didnt last long. Iam just thinking of building a L motor and looking at all the stuff i have and going with the craziest i can come up with :lol::lol:

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.