Sheepy Posted April 26, 2015 Share Posted April 26, 2015 piman wrote:Hello Mike, "1-3/4" thick Meehanite Cast Iron or Aluminum Tooling Plate give maximum rigidity and resistance to permanent distortion and most closely simulate the stresses induced on the cylinder wall by the cylinder head when it is torqued in place. In addition, these materials have essentially the same coefficient of expansion as cylinder heads, important to those honing at operating temperature."AlecWe have some 40mm thick ally plate (military grade) at work if any one fancies making one ;)The mill is down at work so I can't do it until it's up and running again (no idea when they will get it done)! Quote Link to comment Share on other sites More sharing options...
piman Posted April 26, 2015 Share Posted April 26, 2015 Hello Don, no it is not the same situation. With the block when the head is torqued down there is some block distortion caused by the pull of the head studs, the torque plate simulates that distortion. There is not the same thing with a crank.Alec Quote Link to comment Share on other sites More sharing options...
RobPearce Posted April 27, 2015 Share Posted April 27, 2015 piman wrote: There is not the same thing with a crank. No, but there are related effects. The Rover K-series engine with the huge long head bolts was line-bored with bolts under torque, because the distortion of the bearing cage meant the crank didn't rotate properly otherwise. However, this won't usually affect people like us because it's always the crank itself, not the block, that gets machined when rebuilding. Quote Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.