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Re: Lawson Jigsaw Project

Posted: Thu Jul 12, 2018 6:54 am
Author: z1000puddin
Can anyone identify the pistons ?
The numbers dont seem to be Wiseco

Re: Lawson Jigsaw Project

Posted: Sun Jul 22, 2018 4:14 pm
Author: paul doran
Stuart
shims are under bucket on unitrack heads so it is correct
unusual to see broken shims
I had a smashed shim on a Z1 engine recently and a badly fitting bucket caused it
it would not compress when cam lobe struck it so something had to give and the shim shattered

Re: Lawson Jigsaw Project

Posted: Mon Jul 23, 2018 11:51 am
Author: Kwackman
paul doran wrote:unusual to see broken shims


I read somewhere (maybe on this forum?) that some people ground old shims down to a smaller size rather than buying new ones, and this was likely to effect their "hardness" and cause them to break.
Could be the cause, or an old wive's tale?!