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Question about measuring crank journals

918 views 3 replies 3 participants last post by  v8hed 
#1 ·
If I mike my crank journals, is it still necessary to check bearing clearances with Plastigauge? Conversely, if I use Plastigauge, is it still necessary to mike the journals?

Thanks.
 
#3 · (Edited)
Yes & Yes

Hey Hed, There are alot of professional engine builders on the forum, but they may be on Holiday. I'll answer as a amateur. Measuring first, then rechecking installed clearances is always a good idea. Sometimes the installed clearance is off due to irregularities in the main caps or rod caps, such as a main cap alignment problem or crud in the main cap registers or egg shaped big end on rods. I generally have the machine shop check all the measurements, do any necessary machine work. When I put the engine together, I recheck installed clearances with plastigage. And yes, I have found problems before they became a problem. Hope this helps. olnolan

I type soooo slow that Daniel beat me to it.
 
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