Hi guys,
Reading the Haynes lastnight on re-assembly of the engine and first up it looks like the crankshaft!
Mentions using platigauge to measure tolerances, found the website:
http://www.plastigauge.co.uk/pricelist.html
but my question is, which “kit” do i need?!?!?!
Any help appreciated!
Matt.
Wouldn’t bother, use feeler gauges like any normal person…
The tolerance you’ll need to check on the crank when fitting is the endfloat on the thrust bearings.. ( the 1/2 moon thrusts around the center main cap ), can’t remeber off the top of my head the actual tolerance, but fit the thrusts you have and then run a feeler between the thrust and the crank, remember to check in different places and rotate the crank. You could also use a DTI to measure this endfloat, same with the Primary gear endfloat.
Lol! “Like any normal person”
So as my crankshaft is not having a regrind it’s just a case of new standard size bearings in, torque up and check it rotates freely by hand?
Already got a set of feeler gauges (of course!) so that’s easy done!
Matt.
If you want to assess the crank journals you’d do best with a dial gauge to measure the thickness of the crank in several places as they don’t always wear perfectly round. You should get a fair idea just by looking though.
you need the PL-A size,
assuming the crank journels are all round(they should be cecked with a micrometer) and the crank is straight(checked with a dti) the clearance should be checked with the plastigauge, and you should have 1-2 thou clearance on the main bearings and slightly less on the big ends. the rule of thumb being min clearance .5thou per inch diameter, max clearance 1 thou per inch diameter.
> you need the PL-A size,
assuming the crank journels are all round(they should be cecked with a micrometer) and the crank is straight(checked with a dti) the clearance should be checked with the plastigauge, and you should have 1-2 thou clearance on the main bearings and slightly less on the big ends. the rule of thumb being min clearance .5thou per inch diameter, max clearance 1 thou per inch diameter.
Many thanks for your reply, thats exactly what i was after!
I assume the big end bearings are measured in the same way, but after the crank is installed (as per the Haynes instuctions)?
Cheers,
Matt.
